Formula: Pb14(AsO4)2O9Cl4
Origin of name: for Carl Sahlin, Swedish iron works manager
Crystal system: monoclinic
Crystal class: m or 2/m
Twinning:
Unit cell:
Colour: yellow
Diaphaneity:
Luster:
Habit: thin plates to 2 mm, in aggregates
Hardness: 2 to 3
Specific gravity: 8.0
Cleavage: 1; {010} perfect
Tenacity:
Streak:
Synonyms/varieties:
Comments:
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