Formula: S
Origin of name: for V. Rosicky, Czech mineralogist
Crystal system: monoclinic
Crystal class: 2/m
Twinning:
Unit cell:
Colour: colourless to pale yellow, with greenish tinge
Diaphaneity:
Luster: adamantine
Habit: crystals eqant to platy, acicular, smaller than 0.5 mm, may be skeletal
Hardness: 1
Specific gravity: 2.075 to 2.08
Cleavage: none
Tenacity:
Streak:
Synonyms/varieties:
Comments: dimorphous with sulfur, inverts to sulfur at room temperature
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