hydroboracite

noun

hy·​dro·​boracite

: a mineral CaMgB₆O₁₁.6H₂O consisting of a white hydrous calcium magnesium borate and occurring in fibrous and foliated masses

Word History

Etymology

obsolete German hydroboracit (now hydroborazit), from German hydr- + Medieval Latin borac-, borax borax + German -it -ite

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