Formula: Ca3GdY4Si8O20(CO3)6(OH) . 2H2O
Origin of name: Combination of symbols of elements
Crystal class: mm2
Unit cell: a = 13.3, b = 13.95, c = 9.74
Colour: Colourless, white, pale yellow, greenish
Diaphaneity: Transparent
Habit: Crystal prismatic, rare; coatings, incrustations, stalactites, pulverulent, reniform
Hardness: 4.5
Specific gravity: 3.03
Cleavage: 1; {010} maybe
Streak: White
Synonyms/varieties:
Comments:
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