Formula: (Mn,Ca)(Mn,Fe,Mg)Fe(PO4)2(OH) . 4H2O
Origin of name: From manganese and segelerite
Crystal system: Orthorhombic
Crystal class: 2/m 2/m 2/m
Twinning:
Unit cell:
Colour: Yellow, yellow-green
Diaphaneity: Transparent
Luster: Vitreous
Habit: Prismatic subhedral to 0.05 mm, fine-grained aggregates to 2 mm
Hardness: 3 to 4
Specific gravity: 2.76
Cleavage: 1; {001} imperfect
Tenacity:
Streak: Yellow
Synonyms/varieties:
Comments: Mn analogue of segelerite
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