helvite
noun
hel·vite
| \ ˈhelˌvīt\
variants:
or less commonly helvin \ -və̇n \
or helvine \ " , -ˌvēn \
plural -s
Definition of helvite
: a silicate mineral (Mn,Fe,Zn)8Be6O24S2 consisting of sulfide of manganese and beryllium and usually containing also iron and zinc that is isomorphous with danalite and genthelvite
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