Chkalovite

Formula:  Na₂BeSi₂O₆

Origin of name:  For V. Chkalov, Russian aviator

Crystal system:  Orthorhombic

Crystal class:  mm2

Twinning:

Unit cell:

Colour:  White

Diaphaneity:  Transparent to translucent

Luster:  Vitreous to somewhat greasy

Habit:  Crystals subhedral; massive

Hardness:  ~ 6

Specific gravity:  2.66

Cleavage:  1; {100} imperfect

Tenacity:

Streak:

Synonyms/varieties:

Comments: