Formula: Pb2Mg2Si2O7(OH)2
Origin of name: From Greek for lead and leaf
Crystal system: Hexagonal
Crystal class: 622
Twinning:
Unit cell:
Colour: Colourless, pale green
Diaphaneity: Transparent
Luster: Vitreous
Habit: Crystals platy, foliated aggregates
Hardness: 3 to 4
Specific gravity: 4.72
Cleavage: 1; {0001} perfect
Tenacity:
Streak:
Synonyms/varieties:
Comments:
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