variants or less commonly hielmite
plural -s
: a black mineral that contains yttrium, iron, manganese, uranium, calcium, columbium, tantalum, tin, and tungsten oxide, is often metamict, and has uncertain affinities compare samarskite, tapiolite

Word History


Swedish hjelmit, from P. J. Hjelm †1813 Swedish chemist + Swedish -it -ite

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Dictionary Entries Near hjelmite

Cite this Entry

“Hjelmite.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/hjelmite. Accessed 10 Jun. 2023.

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