Lechatelierite
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Lechatelierite is silica glass, amorphous SiO₂, non-crystalline mineraloid. It is named for Henry Louis Le Chatelier. Wikipedia
Crystal habit: Porcelainous
Crystal system: Amorphous
Dana classification: 75.0.0.0
Formula mass: 60.08 gm
Formula (repeating unit): SiO2
Mohs scale hardness: 6.5
Strunz classification: 4/D.01-10