Formula: Na3H3(Mn,Ca,Fe)TiSi6(O,OH)18.2H2O
Origin of name: From elements in composition (Ti, Si, Na)
Crystal system: Hexagonal
Crystal class: 3 2/m
Twinning:
Unit cell: a = 10.14, c = 13.08
Colour: Yellow-orange
Diaphaneity: Transparent to translucent
Luster: Vitreous
Habit: Crystals rough, subhedral, to 1 mm, granular aggregates
Hardness: 5
Specific gravity: 2.66-2.69
Cleavage: None
Tenacity: Conchoidal to uneven fracture
Streak:
Synonyms/varieties:
Comments: Found as hydrothermal alteration of lomonosovite and barytolamprophyllite in alkalic pegmatites in a differentiated alkalic massif.
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