helviten.
/ˈhɛlvʌɪt/ Mineralogy.
= helvin n.
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the world > the earth > minerals > types of mineral > silicates > miscellaneous silicates > [noun] > of glucinum and manganese
helvin1818
helvite1868
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1868 J. D. Dana Syst. Mineral. (ed. 5) 264 Helvite.
1868 H. B. Jones & H. Watts Fownes's Man. Elem. Chem. (ed. 10) 380 This somewhat rare metal [sc. beryllium] occurs as a silicate..in beryl, emerald, euclase, leucophane, helvite, and several varieties of gadolinite.
This entry has not yet been fully updated (first published 1898; most recently modified version published online March 2022).
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n.1868