Formula: Hg5CrO6
Origin of name: for Lu Watters (1911-1989), a well known California mineral collector, jazz trumpeter, chef and environmentalist.
Crystal system: Monoclinic
Crystal class: 2/m
Twinning: on {100}
Unit cell: a = 11.25, b = 11.63, c = 6.595, β = 98.15°
Colour: Dark reddish brown, bronze, black
Diaphaneity: Opaque to translucent
Luster: Submetallic
Habit: Thin shell-like aggregates in cavities, crystals smaller than 0.l1 mm, crystal aggregates, encrustations
Hardness: 4.5
Specific gravity: 8.91
Cleavage: None
Tenacity: Brittle
Streak: Dark brick red
Synonyms/varieties:
Comments:
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