Formula: CaHAsO4
Origin of name: or Rene Weil (1901-), French mineralogist of Strasbourg, known for his study of Alsatian minerals.
Crystal system: Triclinic
Crystal class: 1
Twinning:
Unit cell: a = 7.11, b = 6.94, c = 7.15, α = 94.32°, β = 101.6°, γ = 87.37°
Colour: White
Diaphaneity: Porcelanous
Luster: Greasy to slightly pearly
Habit: pseudomorphs of pharmacolite and haidingerite, powdery incrustations
Hardness:
Specific gravity: 3.48
Cleavage: None
Tenacity:
Streak: White
Synonyms/varieties:
Comments:
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