Natural pyrite in mineralized Melones Fault zone Harvard Mine, CA

Acid rock drainage from pyrite,
Harvard Mine, CA

Acid mine drainage from abandoned pyritic ore hopper, Ductown, TN

Ist step in pyrite synthesis: Iron and sulfur to be sealed in evacuated quartz tube yielding troilite

Sealing quartz tubes under vacuum

Three zone tube furnace.

The center is set to 700C while the ends are 550 - 650C

Pyrite crystals grow in the cool ends

Ni-doped pyrite

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