FA70
Frame ID: FA 70
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
Mullite in glass with spinel from power plant burning high-sulfur, high volatile C bituminous Western Kentucky coal.