larderellite

noun
lar·​de·​rel·​lite | \ˌlärdəˈreˌlīt\
plural -s

Definition of larderellite 

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

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History and Etymology for larderellite

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

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