FA68

Frame ID: FA68
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

Description: Mullite blades in glass with microcrystalline spinel. From power plant burning high-sulfur, high volatile bituminous Western Kentucky coal.