Formula: Y2(CO3)3.3H2O
Origin of name: for C. Tenger, Swedish chemist
Crystal system: orthorhombic
Crystal class: mm2
Twinning:
Unit cell: a = 6.078, b = 9.157, c = 15.114
Colour: white
Diaphaneity: Transparent to translucent
Luster: dull, vitreous
Habit: coatings, thin crystalline to powdery, crusts, thin fibrous, mammilary
Hardness:
Specific gravity: 3.12
Cleavage:
Tenacity:
Streak: White
Synonyms/varieties:
Comments: Alteration product of gadolinite
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