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Ilsemannite

Year of discovery: 1871 (Bad Bleiberg, Austria), 1915 (Japan)

Locality list: 6 localities of ilsemannite

• Mo₃O₈,nH₂O
• [Mo⁴⁺][(Mo⁶⁺O₄)₂]^4-,nH₂O

• Class: Molybdate - Hydrate
• Soluble in: Water
• Lightfastness: Turn blue by Light exposure

• [] => Fe: Kamiokite
• [] => Mn: Iseite

• Color: Black
• Tarnish: Blue (by light exposure)
• Streak: Dark brown

• Cleavage: Good
• Hardness: 5.5-6

• System: Amorphous