Formula: (Na,K)6(Mn,Fe)3Si9O24.6H2O
Origin of name: for Ilarionovich Shafranovskii, Russian mineralogist
Crystal system: hexagonal
Crystal class: 3m
Twinning:
Unit cell:
Colour: olive-green to yellow-green
Diaphaneity:
Luster: vitreous
Habit: aggregates, fine-grained, 3 to 5 mm across
Hardness: 2 to 3
Specific gravity: 2.78
Cleavage: none
Tenacity:
Streak:
Synonyms/varieties:
Comments:
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