Formula: (K,Ba)NaCa2(Si,Ti)4O11(F,OH).H2O
Origin of name: after locality Mount Yukspor, Khibiny massif, Kola Peninsula, Russia
Crystal system: Orthorhombic
Crystal class: Unknown
Twinning:
Unit cell: a = 24.869, b = 16.756, c = 7.057
Colour: Brown pink, pink to red
Diaphaneity: Semitransparent
Luster: Silky
Habit: massive, fibrous or lamellar, concretionary, nodular
Hardness: 4.5-5
Specific gravity: 3.05
Cleavage: 1, perfect
Tenacity:
Streak: White, nearly white
Synonyms/varieties:
Comments:
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