Formula: K(Ca,Na)6(Si,Al)10O22(SO4,CO3,(OH)2).H2O
Origin of name: after locality Tuscany region, Italy
Crystal system: monoclinic
Crystal class: 2/m
Twinning:
Unit cell:
Colour: colourless
Diaphaneity: transparent
Luster:
Habit: cleavage fragments to 1 cm
Hardness: 5.5 to 6
Specific gravity: 2.83
Cleavage: 1; {100} distinct
Tenacity:
Streak:
Synonyms/varieties:
Comments:
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