Nosean

Formula: Na₈Al₆Si₆O₂₄(SO₄).H₂O

Origin of name: for Karl Nose, German mineralogist

Crystal system: cubic

Crystal class: -43m

Twinning: on {111}

Unit cell: a = 9.08 Å

Colour: colourless, white, gray, bluish, brown, reddish black

Diaphaneity: 

Luster: vitreous

Habit: crystals dodecahedral, massive, granular

Hardness: 5.5

Specific gravity: 2.30 to 2.40

Cleavage: 1; {110} indistinct

Tenacity: brittle

Streak: 

Synonyms/varieties: noselite

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