Formula: Na2Mn9(Mg,Mn)7(AsO4)2(SiO17)2(OH)8
Origin of name: For John Innes, Namibian mineralogist
Crystal system: Triclinic
Crystal class: -1
Twinning:
Unit cell:
Colour: Light yellow-brown
Diaphaneity:
Luster: Vitreous
Habit: Bladed to fibrous aggregates to 4.5 cm long
Hardness:
Specific gravity: 3.48
Cleavage: 2; {100} good, {010} poor
Tenacity:
Streak: Light brownish yellow
Synonyms/varieties:
Comments:
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