Formula: Na2SiF6
Origin of name: For A. Malladra, Italian volcanologist
Crystal system: Hexagonal
Crystal class: 32
Twinning:
Unit cell:
Colour: Pale rose
Diaphaneity:
Luster:
Habit: Crusts
Hardness:
Specific gravity: 2.714
Cleavage: None
Tenacity:
Streak:
Synonyms/varieties:
Comments:
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