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amblygonite

[am-blig-uh-nahyt] /æmˈblɪg əˌnaɪt/
noun
1.
a mineral, a lithium aluminum fluorophosphate, Li(AlF)PO 4 : an ore of lithium.
Origin
1840-1850
1840-50; < Greek amblygṓn(ios) (amblý(s) blunt, obtuse + gōní(a) angle + -os adj. suffix) + -ite1
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British Dictionary definitions for amblygonite

amblygonite

/æmˈblɪɡəˌnaɪt/
noun
1.
a white or greyish mineral consisting of lithium aluminium fluorophosphate in triclinic crystalline form. It is a source of lithium. Formula: (Li,Na)Al(PO4)(F,OH)
Word Origin
C16: from Greek amblugōnios, from amblus blunt + gōnia angle; referring to the obtuse angles in its crystals
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Encyclopedia Article for amblygonite

phosphate mineral composed of lithium, sodium, and aluminum phosphate [(Li,Na)AlPO4(F,OH)], that is an ore of lithium. It occurs in lithium- and phosphate-rich granitic pegmatites, often in very large, white, translucent masses. It has been mined at Keystone, S.D., and in South Africa, Zimbabwe, and several other countries. Clear material from Hebron, Maine, has been faceted as a gemstone. For detailed physical properties, see phosphate mineral (table)

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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