Formula: Ca(C2O4).2H2O
Origin of name: for locality Weddell Sea, Antarctica
Crystal system: Tetragonal
Crystal class: 4/m
Twinning:
Unit cell: a = 12.33, c = 7.353
Colour: Colourless, tan, white or yellowish brown to brown from organic inclusions
Diaphaneity: Transparent
Luster: Vitreous
Habit: crystals pyramidal, minute, uncommon in small aggregates, or crystals to 4 cm
Hardness: about 4
Specific gravity: 2.02
Cleavage: 1; {010} good
Tenacity:
Streak: White
Synonyms/varieties:
Comments:
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