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Ferberite (Photo)

Year of discovery: 1863 (Niña mine, Spain), 1902 (Japan)

Locality list: 40 localities of ferberite

• FeWO₄
• (Fe,Mn)WO₄
• [Fe²⁺][WO₄]^2-

• Class: Tungstate (As there are no WO₄ tetrahedra, it may be classified as Oxide from structural point of view.)
• Soluble in: HCl (Decompose), Aqua regia (Decompose)
• Magnetism: Paramagnetic (Weak)
• Substitution pseudomorph: Replace Scheelite. (Reinite)

• Fe => Mn: Hübnerite (Hubnerite)
• Fe => Ca: Scheelite
• Fe => Zn: Sanmartinite
• Fe => Pb: Stolzite, Raspite
• Fe => (BiO)₂: Russellite

• Color: Black
• Streak: Black
• Luster: Adamantine
• Diaphaneity: Opaque

• Habit: Thin Platy

• Cleavage: Perfect on {010} (1 plane), Parting on {100} and {102} (2 planes)
• Hardness: 4-4.5
• Density: 7.6

• System: Monoclinic
• Group: 2/m, P2/b
• Lattice: a=4.7, b=5.7, c=5.0, β=90.0