Formula: Na(CaNa)(Mg,Fe)5Si8O22(F,OH)2
Origin of name: From fluorine and richterite
Crystal system: Monoclinic
Crystal class: 2/m
Twinning:
Unit cell:
Colour: Light green to blue green
Diaphaneity:
Luster: Vitreous
Habit: Elongate to 10 cm
Hardness: 5 to 6
Specific gravity:
Cleavage: 1; {110} perfect
Tenacity:
Streak: White
Synonyms/varieties:
Comments:
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