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BERYLLONITE

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Originally appearing in Volume V03, Page 818 of the 1911 Encyclopedia Britannica.
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BERYLLONITE , a See also:

mineral phosphate of See also:beryllium and See also:sodium, NaBePO4, found as highly complex orthorhombic crystals and as broken fragments in the disintegrated material of a granitic vein at See also:Stoneham, See also:Maine, where it is associated with See also:felspar, smoky See also:quartz, See also:beryl and See also:columbite. It was discovered by Prof. E. S. See also:Dana in 1888, and named beryllonite because it contains beryllium in large amount. The crystals vary from colourless to See also:white or See also:pale yellowish, and are trans-See also:parent with a vitreous lustre; there is a perfect cleavage in one direction. Hardness 51-6; specific gravity 2.845. A few crystals have been cut and faceted, but, as the refractive See also:index is no higher than that of quartz, they do not make very brilliant See also:gem-stones.

End of Article: BERYLLONITE

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