Formula: NaCaBeSi2O6F
Sorosilicate (Si2O7 groups), beryllium-bearing mineral
Crystal System: Orthorhombic
Specific gravity: 2.96 to 3.07 measured, 2.961 calculated
Hardness: 3 to 4
Streak: White
Colour: Colourless, pale yellow, light green
Common impurities: Al,Fe,Mg,K,H2O
Environments:
Leucophanite is a beryllium mineral occuring in
nepheline-syenite pegmatites
associated with pyrochlore,
nepheline, mosandrite-(Ce), albite,
aegirine (Mindat),
orthoclase,
natrolite, analcime,
serandite,
polylithionite,
ancylite, astrophyllite,
catapleiite,
epididymite,
rhodochrosite and
fluorite
(HOM).
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