Formula: (U,Ca,Ce)2(PO4)2.1-2H2O
Origin of name: after locality Ninyo-toge mine, Tottori Prefecture, Japan
Crystal system: orthorhombic, pseudohexagonal
Crystal class: 222
Twinning:
Unit cell: a = 6.78, b = 12.1, c = 6.38
Colour: brownish green to brown in transmitted light
Diaphaneity: Translucent
Luster: Greasy
Habit: crystals columnar, acicular or elongated lozenges, to 0.1 mm, coatings
Hardness: 3-4
Specific gravity: 4.75
Cleavage: none
Tenacity:
Streak:
Synonyms/varieties:
Comments:
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