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Ferrimolybdite (Photo)

Year of discovery: 1913 (Alekseevskii mine, Russia), 1914 (Japan)

Locality list: 29 localities of ferrimolybdite

• Fe₂(MoO₄)₃,7H₂O
• Fe₂(MoO₄)₃,7-8H₂O
• [Fe³⁺₂][(MoO₄)₃]^6-,7H₂O

• Class: Molybdate - Hydrate
• Soluble in: HCl, NH₃aq (Slowly)
• Formed by alteration of Powellite.

• Color: Yellow
• Streak: Pale yellow
• Luster: Adamantine
• Diaphaneity: Transparent-Translucent

• Habit: Earthy, Acicular

• Hardness: 1-2
• Density: 3.0

• System: Orthorhombic
• Group: mmm, Pmmn
• Lattice: a=6.7, b=15.4, c=30.0