Formula: Ca(Y,REE)(CO3)2OH·H2O
Origin of name: Named for Erling Kamphaug (1931-), Norwegian mineral collector.
Crystal system: Tetragonal
Crystal class: 4 2 2
Twinning:
Unit cell: a = 7.434, c = 21.793
Colour: Colourless, white, light yellow, brown
Diaphaneity: Transparent
Luster: Vitreous
Habit:
Hardness: 2-3
Specific gravity: 3.19
Cleavage: None
Tenacity:
Streak: White
Synonyms/varieties:
Comments:
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