Leucophanite

sorosilicate

pegmatite

Formula: NaCaBeSi2O6F
Sorosilicate
Specific gravity: 2.96
Hardness: 3 to 4
Streak: White
Colour: Colourless, pale yellow, light green
Environments:

Pegmatites

Leucophanite occurs in nepheline-syenite pegmatites associated with pyrochlore, nepheline, mosandrite-(Ce), albite, aegirine, orthoclase, natrolite, analcime, serandite, polylithionite, ancylite, astrophyllite, catapleiite, epididymite, rhodochrosite and fluorite (HOM).

Common impurities: Al,Fe,Mg,K,H2O

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