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Butlerite
noun
But·ler·ite
\ˈbətləˌrīt\
Definition of Butlerite
-s
: a mineral Fe(SO4)(OH).2H2O consisting of hydrous basic sulfate of iron
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Origin and Etymology of butlerite
Dean G.M. Butler, born 1881 American geologist and mineralogist + English -ite
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