Formula: Pb2(Fe,Mn)(VO4)2OH
Origin of name:
Crystal system: Monoclinic
Crystal class: 2/m
Twinning:
Unit cell: a = 7.66 Å, b = 6.12 Å, c = 8.93 Å, β = 112°
Colour: Reddish orange, Reddish brown
Diaphaneity: Translucent to transparent
Luster: Vitreous to adamanite
Habit:
Hardness:
Specific gravity: 6.14 (calculated)
Cleavage:
Tenacity:
Streak:
Synonyms/varieties: Ferribrackebushite
Comments: Proposed IMA 2001
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