Formula: Ca2(Mn,Fe)FeSi5O14(OH)
Origin of name: From manganese and babingtonite
Crystal system: Triclinic
Crystal class: -1
Twinning:
Unit cell: a = 6.91 Å, b = 11.72 Å, c = 6.78 Å, α = 90.4°, β = 93.8°, γ = 104.8°
Colour: Greenish-black to yellow green
Diaphaneity:
Luster:
Habit:
Hardness: 5.5 to 6
Specific gravity: 3.45
Cleavage: 2; {001} perfect, {1-10} imperfect
Tenacity: Brittle
Streak:
Synonyms/varieties:
Comments: Series with babingtonite
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