Definition of dickinsonite
: a green mineral H2Na6(Mn,Fe,Ca,Mg)14(PO4)12.H2O consisting of foliated hydrous acid phosphate chiefly of manganese, iron, and sodium (specific gravity 3.34)
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Origin and Etymology of dickinsonite
William Dickinson, 19th century American clergyman and mineralogist + English -ite
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