Formula: FeWO4
Origin of name: For Rudolph Ferber, Germany
Crystal system: Monoclinic
Crystal class: 2/m
Twinning: Common on {100}, contact, penetration, or rarely lamellar; common on {023}, contact or penetration
Unit cell: a = 4.73 Ǻ, b = 5.70 Ǻ, c = 4.95 Ǻ, β = 90.0°
Colour: Black
Diaphaneity:
Luster: Submetallic
Habit: Crystals wedge-shaped or short prismatic, flattened; massive; groups of bladed crystals
Hardness: 4 to 4.5
Specific gravity: 7.51
Cleavage: 1; {010} perfect
Tenacity: Uneven; brittle
Streak: Brownish black to black
Synonyms/varieties:
Comments: Series with hübnerite, member of what used to be known as the wolframite series
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