Zektzerite

Formula: NaLiZrSi₆O₁₅

Origin of name: for J. Zektzerite, American collector

Crystal system: Orthorhombic

Crystal class: 2/m 2/m 2/m

Twinning:

Unit cell: a = 14.33, b = 17.354, c = 10.164

Colour: Colourless to white to pink

Diaphaneity: Transparent to translucent

Luster: Pearly, vitreous in cleavage or fracture

Habit: Crystals pseudohexagonal, tabular, to 38 mm

Hardness: 6

Specific gravity: 2.79

Cleavage: 2; {100} and {010} perfect

Tenacity:

Streak: White

Synonyms/varieties:

Comments: Fluoresces yellowish white