Davanite

Formula:  K₂TiSi₆O₁₅

Origin of name:  After locality; Davan Spring, Yakutiya, Russia

Crystal system:  Monoclinic

Crystal class:  -1

Twinning:

Unit cell:

Colour:  Colourless

Diaphaneity:

Luster:  Vitreous

Habit:  Small grains, pseudohexagonal; euhedral crystals to 40 x 130 µm at Smoky Butte, Montana

Hardness:  5

Specific gravity:  2.76

Cleavage:  None

Tenacity:

Streak:

Synonyms/varieties:

Comments:  Ti analogue of dalyite