amblygonite

noun
am·​blyg·​o·​nite | \amˈbligəˌnīt\
plural -s

Definition of amblygonite 

: a mineral (Li, Na)AlPO4(F, OH) consisting of basic lithium aluminum phosphate commonly containing sodium and fluorine and occurring in white cleavable masses

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First Known Use of amblygonite

1820, in the meaning defined above

History and Etymology for amblygonite

German amblygonit, from Greek amblygōnios obtuse-angled (from ambly- + -gōnios, from gōnia angle) + German -it -ite

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The first known use of amblygonite was in 1820

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