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devillite

noun
de·​vil·​lite | \dəˈvēˌlīt, -viˌ-\
plural -s

Definition of devillite 

: a mineral Cu4Ca(SO4)2(OH)6.3H2O consisting of a hydrous basic sulfate of copper and calcium found in Cornwall and elsewhere in dark green 6-sided platy crystals

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History and Etymology for devillite

French devilline devillite (from Henri Étienne Sainte-Claire Deville †1881 French chemist + French -ine) + English -ite

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