Fly Ash

	Frame ID: F01 Sample ID: C1 III DC5/+100 (slide 312-10) Magnification: 330 microns on long side Illuminator: Vertical Objective: 32x oil Polarizer: In Analyzer: Out Retarder Plate: Out Filter: Important Features: Isotropic coke High Resolution Image (300 dpi)
Description: Isotropic coke, with small amounts of inertinite, from combustion of high volatile bituminous Eastern Kentucky coal.

	Frame ID: F02 Sample ID: 92214 (slide 314-14) Magnification: 330 microns on long side Illuminator: Vertical Objective: 32x oil Polarizer: In Analyzer: Out Retarder Plate: Out Filter: Important Features: Isotropic coke High Resolution Image (300 dpi)
Description: Isotropic coke from combustion of high volatile Illinois Basin coal.

	Frame ID: F03 Sample ID: slide 334-35 Magnification: 330 microns on long side Illuminator: Vertical Objective: 32x oil Polarizer: In Analyzer: Out Retarder Plate: Out Filter: Important Features: Isotropic coke High Resolution Image (300 dpi)
Description: Isotropic coke surrounding glass spheres. From combustion of Appalachian coal.

	Frame ID: F04 Sample ID: 46004 (slide 375-33) Magnification: 270 microns on long axis Illuminator: Vertical Objective: 50x oil Polarizer: In Analyzer: Out Retarder Plate: Out Filter: Important Features: Isotropic coke High Resolution Image (300 dpi)
Description: Isotropic coke surrounding glass spheres.

	Frame ID: F05 Sample ID: 92537 (slide 378-11 Magnification: 270 microns on long axis Illuminator: Vertical Objective: 50x oil Polarizer: In Analyzer: Out Retarder Plate: Out Filter: Important Features: Isotropic coke High Resolution Image (300 dpi)
Description: Isotropic coke, with inertinite at bottom of frame, from combustion of high volatile A bituminous central Eastern Kentucky coal.

	Frame ID: F06 Sample ID: 92587/+100 (slide 403-2) Magnification: 200 microns on long axis Illuminator: Vertical Objective: 50x oil Polarizer: In Analyzer: Out Retarder Plate: Out Filter: Important Features: Isotropic coke High Resolution Image (300 dpi)
Description: Isotropic coke from the combustion of high volatile B bituminous western US coal.

	Frame ID: F07 Sample ID: 92584/+30 (slide 406-22) Magnification: 200 microns on long axis Illuminator: Vertical Objective: 50x oil Polarizer: In Analyzer: Out Retarder Plate: Out Filter: Important Features: Isotropic coke High Resolution Image (300 dpi)
Description: Isotropic coke from the combustion of high volatile B bituminous western US coal.

	Frame ID: F08 Sample ID: 91972 (slide 287-35) Magnification: 330 microns on long axis Illuminator: Vertical Objective: 32x oil Polarizer: In Analyzer: Out Retarder Plate: Out Filter: Important Features: Anisotropic coke High Resolution Image (300 dpi)
Description: Anisotropic coke from a power plant burning high volatile A Central Appalachian coal. This carbon may be from petroleum.

	Frame ID: F09 Sample ID: 91972 (slide 287-36) Magnification: 330 microns on long axis Illuminator: Vertical Objective: 32x oil Polarizer: In Analyzer: In Retarder Plate: In Filter: Important Features: Anisotropic coke High Resolution Image (300 dpi)
Description: Anisotropic coke from a power plant burning high volatile A Central Appalachian coal. This carbon may be from petroleum.

	Frame ID: F10 Sample ID: 91978 (slide 288-14) Magnification: 330 microns on long axis Illuminator: Vertical Objective: 32x oil Polarizer: In Analyzer: In Retarder Plate: In Filter: Important Features: Anisotropic coke High Resolution Image (300 dpi)
Description: Anisotropic coke from a power plant burning high volatile A Central Appalachian coal. This carbon may be from petroleum coke.

	Frame ID: F11 Sample ID: 3-8 +100 (slide 290-22) Magnification: 330 microns on long axis Illuminator: Vertical Objective: 32x oil Polarizer: In Analyzer: Out Retarder Plate: Out Filter: Important Features: Anisotropic coke High Resolution Image (300 dpi)
Description: Anisotropic coke from the combustion of high volatile A bituminous Central Appalachian coal.

	Frame ID: F12 Sample ID: 91992 Magnification: 200 microns on long axis Illuminator: Vertical Objective: 32x oil Polarizer: In Analyzer: In Retarder Plate: In Filter: Important Features: Anisotropic coke High Resolution Image (300 dpi)
Description: Anisotropic coke (through middle of frame) from power plant burning a blend of high volatile bituminous Illinois Basin coals.

	Frame ID: F13 Sample ID: 92053 (slide 314-29) Magnification: 330 microns on ling axis Illuminator: Vertical Objective: 32x oil Polarizer: In Analyzer: Out Retarder Plate: Out Filter: Important Features: Anisotropic coke High Resolution Image (300 dpi)
Description: Variety of textures of anisotropic coke from power plant burning a blend of Illinois Basin coals.

	Frame ID: F14 Sample ID: 92053 (slide 314-29) Magnification: 330 microns on ling axis Illuminator: Vertical Objective: 32x oil Polarizer: In Analyzer: In Retarder Plate: In Filter: Important Features: Anisotropic coke High Resolution Image (300 dpi)
Description: Variety of textures of anisotropic coke from power plant burning a blend of Illinois Basin coals.

	Frame ID: F15 Sample ID: slide 325-28 Magnification: 330 microns on ling axis Illuminator: Vertical Objective: 32x oil Polarizer: In Analyzer: In Retarder Plate: In Filter: Important Features: Anisotropic coke High Resolution Image (300 dpi)
Description: Anisotropic coke from bottom ash from combustion of Central Appalachian high volatile A bituminous coal.

	Frame ID: F16 Sample ID: HMPL 4/26 left (slide 332-9) Magnification: 330 microns on long axis Illuminator: Vertical Objective: 32x oil Polarizer: In Analyzer: Out Retarder Plate: Out Filter: Important Features: Anisotropic coke High Resolution Image (300 dpi)
Description: Variety of textures of anisotropic coke from power plant burning a blend high volatile bituminous of Illinois Basin coals. The sample is from a split of 92053 (FA13 and FA14). FA12 is from a later collection at the same power plant.

	Frame ID: F17 Sample ID: HMPL 4/26 left (slide 332-10) Magnification: 330 microns on long axis Illuminator: Vertical Objective: 32x oil Polarizer: In Analyzer: In Retarder Plate: In Filter: Important Features: Anisotropic coke High Resolution Image (300 dpi)
Description: Variety of textures of anisotropic coke from power plant burning a blend high volatile bituminous of Illinois Basin coals. The sample is from a split of 92053 (FA13 and FA14). FA12 is from a later collection at the same power plant.

	Frame ID: F18 Sample ID: HMPL 4/27 center (slide 333-21) Magnification: 330 microns on long axis Illuminator: Vertical Objective: 32 x oil Polarizer: In Analyzer: Out Retarder Plate: Out Filter: Important Features: Anisotropic coke High Resolution Image (300 dpi)
Description: Variety of textures of anisotropic coke from power plant burning a blend high volatile bituminous of Illinois Basin coals. The sample is from a split of 92053 (FA13 and FA14, FA16 and FA17). FA12 is from a later collection at the same power plant.

	Frame ID: F19 Sample ID: HMPL 4/27 center (slide 333-22) Magnification: 330 microns on long axis Illuminator: Vertical Objective: 32 x oil Polarizer: In Analyzer: In Retarder Plate: In Filter: Important Features: Anisotropic coke High Resolution Image (300 dpi)
Description: Variety of textures of anisotropic coke from power plant burning a blend high volatile bituminous of Illinois Basin coals. The sample is from a split of 92053 (FA13 and FA14, FA16 and FA17). FA12 is from a later collection at the same power plant.

	Frame ID: F20 Sample ID: slide 341-14 Magnification: 330 microns on long axis Illuminator: Vertical Objective: 32x oil Polarizer: In Analyzer: In Retarder Plate: In Filter: Important Features: Anisotropic coke High Resolution Image (300 dpi)
Description: Petroleum coke from a power plant burning Powder River Basin subbituminous coal with the addition of petroleum coke.

	Frame ID: F21 Sample ID: slide 351-37 Magnification: 200 microns on long axis Illuminator: Vertical Objective: 32x oil Polarizer: In Analyzer: In Retarder Plate: In Filter: Important Features: Anisotropic coke High Resolution Image (300 dpi)
Description: Variety of textures in anisotropic coke.

	Frame ID: F22 Sample ID: 91933 (slide 303-15) Magnification: 330 microns on long axis Illuminator: Vertical Objective: 32x oil Polarizer: In Analyzer: Out Retarder Plate: Out Filter: Important Features: Inertinite High Resolution Image (300 dpi)
Description: Inertinite from power plant burning high volatile A bituminous southeastern Kentucky coal.

	Frame ID: F23 Sample ID: slide 312-36 Magnification: 330 microns on long axis Illuminator: Vertical Objective: 32x oil Polarizer: In Analyzer: Out Retarder Plate: Out Filter: Important Features: Inertinite High Resolution Image (300 dpi)
Description: Inertinite, with minor isotropic coke, from power plant burning high volatile b and A bituminous Eastern Kentucky coal.

	Frame ID: F24 Sample ID: 92289 (slide 331-30) Magnification: 330 microns on ong axis Illuminator: Vertical Objective: 32x oil Polarizer: In Analyzer: Out Retarder Plate: Out Filter: Important Features: Inertinite High Resolution Image (300 dpi)
Description: Inertinite from a power plant burning high volatile A bituminous Eastern Kentucky coal.

	Frame ID: F25 Sample ID: slide 347-31 Magnification: 330 microns on ong axis Illuminator: Vertical Objective: 32x oil Polarizer: In Analyzer: Out Retarder Plate: Out Filter: Important Features: Inertinite High Resolution Image (300 dpi)
Description: Variety of inertinite forms from power plant burning high volatile A bituminous Central Appalachian coal.

	Frame ID: F26 Sample ID: 92412 (slide 371-1) Magnification: 330 microns on long axis) Illuminator: Vertical Objective: 32x oil Polarizer: In Analyzer: Out Retarder Plate: Out Filter: Important Features: Inertinite High Resolution Image (300 dpi)
Description: Inertinite from a power plant burning a high volatile A to low volatile bituminous Northern Appalachian coal blend.

	Frame ID: F27 Sample ID: slide 384-21 Magnification: 270 microns on long axis Illuminator: Vertical Objective: 50x oil Polarizer: In Analyzer: In Retarder Plate: In Filter: Important Features: Inertinite High Resolution Image (300 dpi)
Description: Inertinite (top and bottom) with anisotropic coke connecting the two forms.

	Frame ID: F28 Sample ID: PR2-20 (slide 385-6) Magnification: 270 microns on long axis Illuminator: Vertical Objective: 50x oil Polarizer: In Analyzer: Out Retarder Plate: Out Filter: Important Features: Inertinite High Resolution Image (300 dpi)
Description: Inertinite from a power plant burning high volatile A bituminous central Eastern Kentucky coal. Note incipient breakdown of inertinite cell walls.

	Frame ID: F29 Sample ID: LS-2 (slide 396-2) Magnification: 200 microns on long axis Illuminator: Vertical Objective: 50x oil Polarizer: In Analyzer: Out Retarder Plate: Out Filter: Important Features: Inertinite High Resolution Image (300 dpi)
Description: Inertinite from a power plant burning high volatile A bituminous central Eastern Kentucky coal. Note incipient breakdown of inertinite cell walls.

	Frame ID: F30 Sample ID: LS-2 (slide 396-6) Magnification: 200 microns on long axis Illuminator: Vertical Objective: 50x oil Polarizer: In Analyzer: Out Retarder Plate: Out Filter: Important Features: Inertinite High Resolution Image (300 dpi)
Description: Inertinite from a power plant burning high volatile A bituminous central Eastern Kentucky coal.

	Frame ID: F31 Sample ID: LS-2 (slide 396-8) Magnification: 200 microns on long axis Illuminator: Vertical Objective: 50x oil Polarizer: In Analyzer: Out Retarder Plate: Out Filter: Important Features: Inertinite High Resolution Image (300 dpi)
Description: Inertinite from a power plant burning high volatile A bituminous central Eastern Kentucky coal. Note incipient breakdown of inertinite cell walls.

	Frame ID: F32 Sample ID: DD-4 (slide 397-13) Magnification: 200 microns on long axis Illuminator: Vertical Objective: 50x oil Polarizer: In Analyzer: In Retarder Plate: In Filter: Important Features: Inertinite High Resolution Image (300 dpi)
Description: Inertinite from a power plant burning high volatile A bituminous central Eastern Kentucky coal. Note incipient breakdown of inertinite cell walls.

	Frame ID: F33 Sample ID: slide 290-4 Magnification: 330 microns on long axis Illuminator: Vertical Objective: 32x oil Polarizer: In Analyzer: Out Retarder Plate: Out Filter: Important Features: Mixed field High Resolution Image (300 dpi)
Description: Inertinite (center) with vitrinite-derived isotropic coke from power plant burning high volatile B and A bituminous Eastern Kentucky coal.

	Frame ID: F34 Sample ID: slide 290-7 Magnification: 330 microns on long axis Illuminator: Vertical Objective: 32x oil Polarizer: In Analyzer: In Retarder Plate: In Filter: Important Features: Mixed field High Resolution Image (300 dpi)
Description: Anisotropic coke with isotropic coke (along upper right boundary of particle) from power plant burning high volatile B and A bituminous Eastern Kentucky coal.

	Frame ID: F35 Sample ID: 91938 (slide 303-31) Magnification: 330 microns on long axis Illuminator: Vertical Objective: 32x oil Polarizer: In Analyzer: Out Retarder Plate: Out Filter: Important Features: Mixed field High Resolution Image (300 dpi)
Description: Inertinite/partially combusted coal (top) with isotropic coke from power plant burning high volatile A bituminous Eastern Kentucky coal.

	Frame ID: F36 Sample ID: 92051 (slide 320-35) Magnification: 330 microns on long axis Illuminator: Vertical Objective: 32x oil Polarizer: In Analyzer: In Retarder Plate: In Filter: Important Features: Mixed field High Resolution Image (300 dpi)
Description: Anisotropic coke to left and right of inertinite. From power plant burning high volatile A bituminous Eastern Kentucky coal.

	Frame ID: F37 Sample ID: slide 322-25 Magnification: 330 microns on long axis Illuminator: Vertical Objective: 32x oil Polarizer: In Analyzer: Out Retarder Plate: Out Filter: Important Features: Mixed field High Resolution Image (300 dpi)
Description: Inertinite (lower left), anisotropic coke (upper center), and isotropic coke (center right) from power plant burning bituminous Appalachian coal.

	Frame ID: F38 Sample ID: 92289 (slide 332-2) Magnification: 330 microns on long axis Illuminator: Vertical Objective: 32x oil Polarizer: In Analyzer: Out Retarder Plate: Out Filter: Important Features: Mixed field High Resolution Image (300 dpi)
Description: Isotropic coke (top) with inertinite from power plant burning high volatile A bituminous Central Appalachian coal.

	Frame ID: F39 Sample ID: slide 360-19 Magnification: 330 microns on long axis Illuminator: Vertical Objective: 32x oil Polarizer: In Analyzer: Out Retarder Plate: Out Filter: Important Features: Mixed field High Resolution Image (300 dpi)
Description: Inertinite with anisotropic coke from power plant burning South African bituminous coal.

	Frame ID: F40 Sample ID: 92421 (slide 369-20) Magnification: 330 microns on long axis Illuminator: Vertical Objective: 32x oil Polarizer: In Analyzer: Out Retarder Plate: Out Filter: Important Features: Mixed field High Resolution Image (300 dpi)
Description: Inertinite with minor coke from power plant burning a high volatile A to low volatile bituminous Northern Appalachian coal blend.

	Frame ID: F41 Sample ID: PR-2-13 (slide 387-7) Magnification: 270 microns on long axis Illuminator: Vertical Objective: 50x oil Polarizer: In Analyzer: In Retarder Plate: In Filter: Important Features: Mixed field High Resolution Image (300 dpi)
Description: Inertinite (bottom) with anisotropic coke from combustion of high volatile A bituminous central Eastern Kentucky coal.

	Frame ID: F42 Sample ID: slide 288-26 Magnification: 330 microns on long axis Illuminator: Vertical Objective: 32x oil Polarizer: In Analyzer: Out Retarder Plate: Out Filter: Important Features: Partially burned coal High Resolution Image (300 dpi)
Description: Partially burned coal (center), with isotropic coke particles to left and right, from combustion of high volatile A and B Eastern Kentucky coal.

	Frame ID: F43 Sample ID: 91908 (slide 303-5) Magnification: 330 microns on long axis Illuminator: Vertical Objective: 32x oil Polarizer: In Analyzer: Out Retarder Plate: Out Filter: Important Features: Partially burned coal High Resolution Image (300 dpi)
Description: Partially burned vitrinite (right center) showing devolatilization features. Note lower reflectance than surrounding coke particles.

	Frame ID: F44 Sample ID: slide 325-19 Magnification: 330 microns on long axis Illuminator: Vertical Objective: 32x oil Polarizer: In Analyzer: Out Retarder Plate: Out Filter: Important Features: Partially burned coal High Resolution Image (300 dpi)
Description: Partially burned coal with devolatilization features and remnant liptinite.

	Frame ID: F45 Sample ID: slide 351-33 Magnification: 330 microns on long axis Illuminator: Vertical Objective: 32x oil Polarizer: In Analyzer: Out Retarder Plate: Out Filter: Important Features: Partially burned coal High Resolution Image (300 dpi)
Description: Partially burned coal with devolatilization features, remnant liptinite, and oxidation rims along particle edges and along fractures.

	Frame ID: F46 Sample ID: 92019 (slide 387-22) Magnification: 270 microns on long axis Illuminator: Vertical Objective: 50x oil Polarizer: In Analyzer: Out Retarder Plate: Out Filter: Important Features: Partially burned coal High Resolution Image (300 dpi)
Description: Partially burned coal from the combustion of high volatile C/B bituminous Illinois Basin coal.

	Frame ID: F47 Sample ID: 92584/100x200 (slide 406-23) Magnification: 200 microns on long axis Illuminator: Vertical Objective: 50x oil Polarizer: In Analyzer: Out Retarder Plate: Out Filter: Important Features: Partially burned coal High Resolution Image (300 dpi)
Description: Partially burned vitrinite from the combustion of high volatile bituminous western US coal.

	Frame ID: F48 Sample ID: slides 282-1 Magnification: 330 microns on long side Illuminator: Vertical Objective: 32x oil Polarizer: Out Analyzer: Out Retarder Plate: Out Filter: Important Features: glass High Resolution Image (300 dpi)
Description: Slides emphasizing glass in a series of size fractions at +100 mesh (+150 5m).

	Frame ID: F49 Sample ID: slides 282-5 Magnification: 330 microns on long side Illuminator: Vertical Objective: 32x oil Polarizer: Out Analyzer: Out Retarder Plate: Out Filter: Important Features: glass High Resolution Image (300 dpi)
Description: Slides emphasizing glass in a series of size fractions at 100 x 200 mesh (150 x 75 5m).

	Frame ID: F50 Sample ID: slides 282-10 Magnification: 330 microns on long side Illuminator: Vertical Objective: 32x oil Polarizer: Out Analyzer: Out Retarder Plate: Out Filter: Important Features: glass High Resolution Image (300 dpi)
Description: Slides emphasizing glass in a series of size fractions at 200 x 325 mesh (75 x 38 5m).

	Frame ID: F51 Sample ID: slides 282-13 Magnification: 330 microns on long side Illuminator: Vertical Objective: 32x oil Polarizer: Out Analyzer: Out Retarder Plate: Out Filter: Important Features: glass High Resolution Image (300 dpi)
Description: Slides emphasizing glass in a series of size fractions at 325 x 500 mesh (38 x 25 5m).

	Frame ID: F52 Sample ID: slides 282-19 Magnification: 330 microns on long side Illuminator: Vertical Objective: 32x oil Polarizer: Out Analyzer: Out Retarder Plate: Out Filter: Important Features: glass High Resolution Image (300 dpi)
Description: Slides emphasizing glass in a series of size fractions at -500 mesh (-25 5m).

	Frame ID: F53 Sample ID: 91981(slide 320-15) Magnification: 330 microns on long side Illuminator: Vertical Objective: 32x oil Polarizer: Out Analyzer: Out Retarder Plate: Out Filter: Important Features: glass High Resolution Image (300 dpi)
Description: Large solid glass spheres, probably containing included sub-micron crystals. From a power plant burning high-sulfur, high volatile bituminous Western Kentucky coal.

	Frame ID: F54 Sample ID: 92271 (slide 323-25) Magnification: 330 microns on long side Illuminator: Vertical Objective: 32x oil Polarizer: Out Analyzer: Out Retarder Plate: Out Filter: Important Features: glass cenosphere High Resolution Image (300 dpi)
Description: Glass cenosphere (upper left). Cenospheres are hollow glassy spheres. From South Carolina power plant burning Eastern Kentucky low-sulfur, high volatile A bituminous coal.

	Frame ID: F55 Sample ID: 92293 (slide 334-33) Magnification: 330 microns on long side Illuminator: Vertical Objective: 32x oil Polarizer: Out Analyzer: Out Retarder Plate: Out Filter: Important Features: Glassy edge of particle High Resolution Image (300 dpi)
Description: Vitrified outer boundary of particle. The interior has been thermally altered, note high reflectance carbons. From Tennessee power plant burning medium-sulfur, high volatile A bituminous Central Appalachian coal.

	Frame ID: F56 Sample ID: 92235 (slide 372-2) Magnification: 330 microns on long side Illuminator: Vertical Objective: 32x oil Polarizer: Out Analyzer: Out Retarder Plate: Out Filter: Important Features: Glass spheres High Resolution Image (300 dpi)
Description: Chambered glass spheres from Kentucky power plant burning low-sulfur, high volatile A bituminous Central Appalachian coal.

	Frame ID: F57 Sample ID: 92537 (slide 378-21) Magnification: 270 microns on long side Illuminator: Vertical Objective: 50x oil Polarizer: Out Analyzer: Out Retarder Plate: Out Filter: Important Features: Glassy edge of particle High Resolution Image (300 dpi)
Description: Vitrified outer boundary of particle. The interior has been thermally altered, note high reflectance carbons. From Kentucky power plant burning medium-sulfur, high volatile A bituminous Eastern Kentucky coal.

	Frame ID: F58 Sample ID: 92371 (slide 386-13) Magnification: 270 microns on long side Illuminator: Vertical Objective: 50x oil Polarizer: Out Analyzer: Out Retarder Plate: Out Filter: Important Features: Large glass sphere High Resolution Image (300 dpi)
Description: Portion of wall of large glassy sphere. Note spinel (to be illustrated in slides ) included in glass. Unspecified coal source.

	Frame ID: F59 Sample ID: 92375 (slide 387-5) Magnification: 270 microns on long side Illuminator: Vertical Objective: 50x oil Polarizer: Out Analyzer: Out Retarder Plate: Out Filter: Important Features: Chambered glass sphere High Resolution Image (300 dpi)
Description: Chambered glass sphere. Unspecified coal source.

	Frame ID: F60 Sample ID: slide 397-37 Magnification: 200 microns on long side Illuminator: Vertical Objective: 50x oil Polarizer: Out Analyzer: Out Retarder Plate: Out Filter: Important Features: glass sphere High Resolution Image (300 dpi)
Description: Glass sphere with inclusions. From power plant burning blend of high-sulfur high volatile bituminous Pennsylvanian coal and low-sulfur high volatile B bituminous Tertiary coal.

	Frame ID: F61 Sample ID: slide 407-20 Magnification: 200 microns on long side Illuminator: Vertical Objective: 50x oil Polarizer: Out Analyzer: Out Retarder Plate: Out Filter: Important Features: Glass with included crystals High Resolution Image (300 dpi)
Description: Glass with unidentified crystals, possibly mullite, from power plant burning Powder River Basin low-sulfur subbituminous coal.

	Frame ID: F62 Sample ID: 92571 (slide 412-1) Magnification: 200 microns on long side Illuminator: Vertical Objective: 50x oil Polarizer: Out Analyzer: Out Retarder Plate: Out Filter: Important Features: Glass with included crystals High Resolution Image (300 dpi)
Description: Glass with included crystals, possibly mullite, from power plant burning high-sulfur, high volatile bituminous Western Kentucky coal.

	Frame ID: F63 Sample ID: 92305 (slide 342-5) Magnification: 330 microns on long side Illuminator: Vertical Objective: 32x oil Polarizer: Out Analyzer: Out Retarder Plate: Out Filter: Important Features: Quartz High Resolution Image (300 dpi)
Description: Quartz with unidentified, high-relief crystal. From Tennessee power plant burning medium-sulfur, high volatile A bituminous Central Appalachian coal.

	Frame ID: F64 Sample ID: 92007 (slide 385-25) Magnification: 270 microns on long side Illuminator: Vertical Objective: 50x oil Polarizer: Out Analyzer: Out Retarder Plate: Out Filter: Important Features: Quartz High Resolution Image (300 dpi)
Description: Quartz from power plant burning Eastern Kentucky high volatile bituminous coal.

	Frame ID: F65 Sample ID: slide 397-36 Magnification: 200 microns on long side Illuminator: Vertical Objective: 50x oil Polarizer: Out Analyzer: Out Retarder Plate: Out Filter: Important Features: Quartz High Resolution Image (300 dpi)
Description: Quartz. From power plant burning blend of high-sulfur high volatile bituminous Pennsylvanian coal and low-sulfur high volatile B bituminous Tertiary coal.

	Frame ID: F66 Sample ID: 92033 (slide 320-25) Magnification: 330 microns on long side Illuminator: Vertical Objective: 32x oil Polarizer: Out Analyzer: Out Retarder Plate: Out Filter: Important Features: Mullite High Resolution Image (300 dpi)
Description: Mullite blades (dark brown) in glass and spinel matrix. From power plant burning high-sulfur, high volatile bituminous Western Kentucky coal.

	Frame ID: F67 Sample ID: 92033 (slide 387-31) Magnification: 270 microns on long side Illuminator: Vertical Objective: 50x oil Polarizer: Out Analyzer: Out Retarder Plate: Out Filter: Important Features: Mullite High Resolution Image (300 dpi)
Description: Mullite in glass. From power plant burning high-sulfur, high volatile bituminous Western Kentucky coal.

	Frame ID: F68 Sample ID: 91964 (slide 387-36) Magnification: 270 microns on long side Illuminator: Vertical Objective: 50x oil Polarizer: Out Analyzer: Out Retarder Plate: Out Filter: Important Features: Mullite High Resolution Image (300 dpi)
Description: Mullite blades in glass with microcrystalline spinel. From power plant burning high-sulfur, high volatile bituminous Western Kentucky coal.

	Frame ID: F69 Sample ID: slide 388-16 Magnification: 270 microns on long side Illuminator: Vertical Objective: 50x oil Polarizer: Out Analyzer: Out Retarder Plate: Out Filter: Important Features: Mullite High Resolution Image (300 dpi)
Description: Mullite from bottom ash from power plant burning high volatile bituminous Central Appalachian coal.

	Frame ID: F70 Sample ID: 92506 (slide 389-10) Magnification: 330 microns on long side Illuminator: Vertical Objective: 32x oil Polarizer: Out Analyzer: Out Retarder Plate: Out Filter: Important Features: Mullite High Resolution Image (300 dpi)
Description: Mullite in glass with spinel from power plant burning high-sulfur, high volatile C bituminous Western Kentucky coal.

	Frame ID: F71 Sample ID: slide 284-33 Magnification: 330 microns on long side Illuminator: Vertical Objective: 32x oil Polarizer: Out Analyzer: Out Retarder Plate: Out Filter: Important Features: Spinel High Resolution Image (300 dpi)
Description: Spinel. Three spinel-rich spheres showing contrasting textures. Interstitial space within spinel-rich spheres is generally glass. From power plant burning low- to medium-sulfur, high volatile bituminous Central Appalachian coal.

	Frame ID: F72 Sample ID: 92103 (slide 285-36) Magnification: 330 microns on long side Illuminator: Vertical Objective: 32x oil Polarizer: Out Analyzer: Out Retarder Plate: Out Filter: Important Features: Spinel High Resolution Image (300 dpi)
Description: Fine spinel dendrites in glass. Bottom ash from power plant burning high-sulfur, high volatile C Illinois Basin coal.

	Frame ID: F73 Sample ID: 92140 (slide 290-11) Magnification: 330 microns on long side Illuminator: Vertical Objective: 32x oil Polarizer: Out Analyzer: Out Retarder Plate: Out Filter: Important Features: Spinel High Resolution Image (300 dpi)
Description: Coarse spinel crystals in glass. Bottom ash from power plant burning high-sulfur, high volatile C Illinois Basin coal.

	Frame ID: F74 Sample ID: 92176 (slide 290-27) Magnification: 330 microns on long side Illuminator: Vertical Objective: 32x oil Polarizer: Out Analyzer: Out Retarder Plate: Out Filter: Important Features: Spinel High Resolution Image (300 dpi)
Description: Spinel in glass with included mullite. Bottom ash from power plant burning high-sulfur, high volatile C Illinois Basin coal.

	Frame ID: F75 Sample ID: 92135 (slide 285-18) Magnification: 330 microns on long side Illuminator: Vertical Objective: 32x oil Polarizer: Out Analyzer: Out Retarder Plate: Out Filter: Important Features: Spinel High Resolution Image (300 dpi)
Description: Two spinel-rich spheres showing contrasts in crystal textures. Fly ash from power plant burning high-sulfur, high volatile C Illinois Basin coal.

	Frame ID: F76 Sample ID: 92054 (slide 316-6) Magnification: 330 microns on long side Illuminator: Vertical Objective: 32x oil Polarizer: Out Analyzer: Out Retarder Plate: Out Filter: Important Features: Spinel High Resolution Image (300 dpi)
Description: Spinel. Bottom ash from power plant burning high-sulfur, high volatile C Illinois Basin coal.

	Frame ID: F77 Sample ID: 92054 (slide 316-7) Magnification: 330 microns on long side Illuminator: Vertical Objective: 32x oil Polarizer: Out Analyzer: Out Retarder Plate: Out Filter: Important Features: Spinel High Resolution Image (300 dpi)
Description: Coarse spinel with finer spinel dendrites in glass. Bottom ash from power plant burning high-sulfur, high volatile C Illinois Basin coal.

	Frame ID: F78 Sample ID: 92029 (slide 319-28) Magnification: 330 microns on long side Illuminator: Vertical Objective: 32x oil Polarizer: Out Analyzer: Out Retarder Plate: Out Filter: Important Features: Spinel High Resolution Image (300 dpi)
Description: Spinel sphere with included spinel and glass spheres. Power plant burning medium-sulfur, high volatile A bituminous Eastern Kentucky coal.

	Frame ID: F79 Sample ID: slide 332-12 Magnification: 190 microns on long side Illuminator: Vertical Objective: 32x oil Polarizer: Out Analyzer: Out Retarder Plate: Out Filter: Important Features: Spinel High Resolution Image (300 dpi)
Description: Spinel from power plant burning high-sulfur, high volatile C bituminous Illinois Basin coal.

	Frame ID: F80 Sample ID: 92306 Magnification: 330 microns on long side Illuminator: Vertical Objective: 32x oil Polarizer: Out Analyzer: Out Retarder Plate: Out Filter: Important Features: Spinel High Resolution Image (300 dpi)
Description: Layered spinels from power plant burning medium-sulfur, high volatile A bituminous Central Appalachian coal.

	Frame ID: F81 Sample ID: slide 346-26 Magnification: 330 microns on long side Illuminator: Vertical Objective: 32x oil Polarizer: Out Analyzer: Out Retarder Plate: Out Filter: Important Features: Spinel High Resolution Image (300 dpi)
Description: Fine spinel dendrites in glass. Bottom ash from power plant burning high-sulfur, high volatile C Illinois Basin coal.

	Frame ID: F82 Sample ID: slide 346-31 Magnification: 330 microns on long side Illuminator: Vertical Objective: 32x oil Polarizer: Out Analyzer: Out Retarder Plate: Out Filter: Important Features: Spinel High Resolution Image (300 dpi)
Description: Web-like spinel dendrites in glass. Bottom ash from power plant burning high-sulfur, high volatile C Illinois Basin coal.

	Frame ID: F83 Sample ID: 92317 (slide 348-27) Magnification: 330 microns on long side Illuminator: Vertical Objective: 32x oil Polarizer: Out Analyzer: Out Retarder Plate: Out Filter: Important Features: Spinel High Resolution Image (300 dpi)
Description: Multiple spinel spheres in 200 x 325 mesh size fraction of fly ash from power plant burning high-sulfur, high volatile C Illinois Basin coal.

	Frame ID: F84 Sample ID: slide 363-16 Magnification: 330 microns on long side Illuminator: Vertical Objective: 32x oil Polarizer: Out Analyzer: Out Retarder Plate: Out Filter: Important Features: Spinel High Resolution Image (300 dpi)
Description: Spinel from Israeli-produced fly ash from a mixed blend of coals.

	Frame ID: F85 Sample ID: slide 385-1 Magnification: 270 microns on long side Illuminator: Vertical Objective: 50x oil Polarizer: Out Analyzer: Out Retarder Plate: Out Filter: Important Features: Spinel High Resolution Image (300 dpi)
Description: Row of five spinel spheres showing contrasts in texture.

	Frame ID: F86 Sample ID: 92032 (slide 386-1) Magnification: 270 microns on long side Illuminator: Vertical Objective: 50x oil Polarizer: Out Analyzer: Out Retarder Plate: Out Filter: Important Features: Spinel High Resolution Image (300 dpi)
Description: Spinel sphere with internal contrast in texture. Fly ash from power plant burning high-sulfur, high volatile C Western Kentucky coal.

	Frame ID: F87 Sample ID: 92075 (slide 387-16) Magnification: 300 microns on long side Illuminator: Vertical Objective: 50x oil Polarizer: Out Analyzer: Out Retarder Plate: Out Filter: Important Features: Spinel High Resolution Image (300 dpi)
Description: Spinel texture. Fly ash from power plant burning high-sulfur, high volatile C Western Kentucky coal.

	Frame ID: F88 Sample ID: slide 388-9 Magnification: 270 microns on long side Illuminator: Vertical Objective: 50x oil Polarizer: Out Analyzer: Out Retarder Plate: Out Filter: Important Features: Spinel High Resolution Image (300 dpi)
Description: Spinel in glass from bottom ash from power plant burning high volatile bituminous Central Appalachian coal.

	Frame ID: F89 Sample ID: 91950 (slide 388-25) Magnification: 270 microns on long side Illuminator: Vertical Objective: 50x oil Polarizer: Out Analyzer: Out Retarder Plate: Out Filter: Important Features: Spinel High Resolution Image (300 dpi)
Description: Spinel sphere with contrasting textures. Fly ash from power plant burning high-sulfur, high volatile C Western Kentucky coal.

	Frame ID: F90 Sample ID: 92506 (slide 389-6) Magnification: 270 microns on long side Illuminator: Vertical Objective: 50x oil Polarizer: Out Analyzer: Out Retarder Plate: Out Filter: Important Features: Spinel High Resolution Image (300 dpi)
Description: Fine spinel dendrites in glass.

	Frame ID: F91 Sample ID: 92591 (slide 397-20) Magnification: 200 microns on long side Illuminator: Vertical Objective: 50x oil Polarizer: Out Analyzer: Out Retarder Plate: Out Filter: Important Features: Spinel High Resolution Image (300 dpi)
Description: Spinel spheres flanking highly-reflecting metal shard. Fly ash from power plant burning low-sulfur, high volatile B bituminous western US coal.