FA66

Frame ID: FA66
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

Description: Mullite blades (dark brown) in glass and spinel matrix. From power plant burning high-sulfur, high volatile bituminous Western Kentucky coal.