Formula: Pb2(SeO4)(SO4)
Origin of name: for Juan Olsacher, Argentine mineralogist
Crystal system: orthorhombic
Crystal class: 222
Twinning:
Unit cell:
Colour: colourless
Diaphaneity: transparent
Luster: vitreous
Habit: crystals elongated, 0.1 to 0.5 mm
Hardness: 3 to 3.5
Specific gravity: 6.55
Cleavage: 2; {101} good, {010} fair
Tenacity:
Streak: colourless
Synonyms/varieties:
Comments:
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