Natrolemoynite

Formula: Na₄Zr₂Si₁₀O₂₆·9(H₂O)

Origin of name: The name alludes to the Na dominance and polymorphic relationship to lemoynite

Crystal system: Monoclinic

Crystal class: 2/m

Twinning: 

Unit cell: a = 10.515, b = 16.2534, c = 9.1029, β = 105°

Colour: Colourless, white

Diaphaneity: Transparent to translucent

Luster: Vitreous

Habit: Radial, aggregates

Hardness: 3

Specific gravity: 2.47

Cleavage: [100] perfect, [001] poor

Tenacity: Brittle, uneven

Streak: White

Synonyms/varieties:

Comments: