Mineralpedia Details for Natrolemoynite

Named in reference to the dominance of sodium (Na) in the composition and for the relationship to lemoynite. Found only at the type locality at the Poudrette quarry at Mont Saint-Hilaire in Quebec, Canada where is occurs with microcline, lemoynite, and sulfides in altered pegmatites that cut nepheline syenite, as well as in unaltered pegmatites. Appears as colorless to white to pink, bladed to prismatic crystals.

Ref. Minerals and their Localities, Bernard, J.H. and Hyršl, J. (2004)

IMA/CNMNC List of Mineral Names (2009) and Candian Mineralogist 39 (2001), 1295

Formula

Na₄Zr₂Si₁₀O₂₆·9H₂O 

Crystal System

Monoclinic 

Crystal Habit

Radial, Aggregates, Bladed 

Cleavage

Perfect, Perfect, Poor 

Luster

Vitreous (Glassy) 

Color

colorless, white 

Streak

white 

Class

Monoclinic - Prismatic 

Fracture

Brittle - Uneven 

Hardness

3 

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Special Info

Type Locality

Three very nice radial groups to 3mm.