stillwellite.
A trigonal-pyramidal rare earth borosilicate mineral.
Meaning & usage
A trigonal-pyramidal rare earth borosilicate mineral.
Where this word comes from
Named after Australian mineralogist Frank Leslie Stillwell (1888–1963), + -ite. As a rare earth mineral ore, it usually requires a suffix of the element (i.e. Stillwellite-(Ce)).
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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.
Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.