Formula: MnSn(OH)6
Origin of name: From tetragonal and wickmanite
Crystal system: Tetragonal
Crystal class: 4/m
Twinning:
Unit cell: a = 7.870 Å, c = 7.797 Å
Colour: Honey-yellow, brownish orange
Diaphaneity: Transparent to translucent
Luster: Vitreous
Habit: Crystals resemble wulfenite, globular masses, rough, rounded, minute, pseudo-cubic
Hardness: 3.5-4.5
Specific gravity: 3.65
Cleavage: None
Tenacity:
Streak: White
Synonyms/varieties:
Comments: dimorphous with wickmanite
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