Formula: (Cu,Ag)14HgS8
Origin of name: For John L. Daniels, Australian geologist who collected the material in which the mineral was found
Crystal system: Orthorhombic
Crystal class: Unknown
Twinning:
Unit cell: a = 9.644 Å, b = 9.180 Å, c = 18.156 Å
Colour: Gray in polished section
Diaphaneity: Opaque
Luster:
Habit: Grains to about 20 µm in ragged polycrystalline masses in anglesite
Hardness: 2 to 2.5
Specific gravity: 6
Cleavage: None
Tenacity:
Streak:
Synonyms/varieties:
Comments: Observed only in polished section. Found in gossan pod in a quartz vein, as a weathering product from other sulphides
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