plural -s
: a mineral Y2Si2O7 or 2Y2Si2O7.H2O consisting of an yttrium silicate and occurring in flesh-red monoclinic crystals possibly isomorphous with thortveitite (hardness 6.5, specific gravity 4.2)

Word History


French thalénite, from T. R. Thalén †1905 Swedish physicist + French -ite

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Dictionary Entries Near thalenite

Cite this Entry

“Thalenite.” Dictionary, Merriam-Webster, Accessed 19 May. 2024.

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