Formula: H6Pb10Al20(PO4)12(SO4)5(OH)40.11H2O
Origin of name: from Greek Orpheus, mythological musician of Greece
Crystal system: hexagonal
Crystal class: -3
Twinning:
Unit cell:
Colour: colourless, gray, pale green to bluish, yellow green
Diaphaneity:
Luster:
Habit:
Hardness: 3.5
Specific gravity: 3.75
Cleavage: none
Tenacity:
Streak:
Synonyms/varieties:
Comments:
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