Formula: Hg3(CO3)(OH).2H2O
Origin of name: for Peter Bayliss, Canadian mineralogist
Crystal system: orthorhombic, pseudotetragonal
Crystal class: 2/m 2/m 2/m
Twinning:
Unit cell:
Colour: black to red-brown
Diaphaneity: opaque
Luster: submetalllic to adamantine
Habit: subhedral to euhedral wedge-shaped crystals, slightly elongated, rarely platy, to 0.2 mm
Hardness: less then 5
Specific gravity: 7.14
Cleavage: none
Tenacity:
Streak: dark brown to black
Synonyms/varieties:
Comments: becomes transparent and effervesces in concentrated HCl
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