larderellite

noun

lar·​de·​rel·​lite

ˌlärdəˈreˌlīt

plural -s

: a mineral (NH₄)₂B₁₀O₁₆.5H₂O(?) consisting of a hydrous ammonium borate and occurring as a white crystalline powder

Word History

Etymology

F. de Larderel †1925 Italian mineowner + English -ite

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