Formula: NaCaFe(Fe,Mn,Fe)2(PO4)3
Origin of name: From ferrous iron (Fe2+) and alluaudite
Crystal system: Monoclinic
Crystal class: 2/m
Twinning:
Unit cell:
Colour: Greenish black
Diaphaneity:
Luster:
Habit:
Hardness: 5
Specific gravity: 3.79
Cleavage:
Tenacity:
Streak:
Synonyms/varieties:
Comments: Series with alluaudite
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