beryllonite

noun

be·​ryl·​lo·​nite

bə-ˈri-lə-ˌnīt

plural -s

: a mineral NaBePO₄ consisting of sodium beryllium phosphate occurring in light-colored topazlike orthorhombic crystals (hardness 5.5–6, specific gravity 2.85)

Word History

Etymology

New Latin beryllium + English -on + -ite

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