pharmacolite
noun
phar·mac·o·lite
färˈmakəˌlīt,
fȧˈm-;
plural -s
: a monoclinic mineral CaH(AsO4).2H2O that is a hydrous acid calcium arsenate occurring in silky fibers of a white or grayish color (hardness 2–2.5, specific gravity 2.64–2.73)
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Merriam-Webster unabridged
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