Formula: (Mn,Fe)Fe2(PO4)2(OH)2 . 4H2O
Origin of name: For Earl V. Shannon, American mineralogist
Crystal system: Monoclinic
Crystal class: 2/m
Twinning:
Unit cell:
Colour: Reddish-brown, bright yellow
Diaphaneity:
Luster: Vitreous
Habit: Prismatic crystals to 0.5 mm in radial aggregates
Hardness: 3 to 4
Specific gravity: 2.90
Cleavage: 2; poor
Tenacity:
Streak:
Synonyms/varieties:
Comments:
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