Formula: (K,Ba,Na)8(Ti,Nb)9(SiO3)16(O,OH)10 . nH2O
Origin of name: For A. and El Labuntsov, Russian mineralogists
Crystal system: Monoclinic
Crystal class: 2/m
Twinning:
Unit cell: a = 14.18 Ǻ, b = 15.48 Ǻ, c = 13.70 Ǻ, β = 117°
Colour: Rose to brownish yellow
Diaphaneity:
Luster: Greasy
Habit: Crystals prismatic
Hardness: ~ 6
Specific gravity: 2.90 to 2.96
Cleavage: 1; {-102}
Tenacity: Brittle
Streak: White
Synonyms/varieties: Titanoelpidite
Comments:
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