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malladrite
noun
mal·la·drite
\məˈläˌdrīt, ˈmaləˌd-\
Definition of malladrite
-s
: a sodium fluosilicate Na2SiF6 occurring in minute hexagonal crystals in fumaroles in the crater of Vesuvius near Naples in Italy
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Origin and Etymology of malladrite
Italian, from Alessandro Malladra †1944 Italian geologist + Italian -ite
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