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n.1.(Min.) A hydrous arsenate of lime, usually occurring in silky fibers of a white or grayish color.
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
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Specimens in this exceptional lot consist of picropharmacolite in tiny, white, spiky spheres of acicular crystals to several millimeters, well scattered on matrix, typically over a pale orange-red druse of realgar and occasionally with transparent and colorless gypsum, yellow sulfur and/or white globular pharmacolite. The specimens have been SEM/EDS verified and come in matrix sizes from 3 to 10 cm in diameter.
(1982), as vivid blue spherules composed of crystals measuring less than 0.01 mm, associated with erythrite, pharmacolite, lollingite, bluish green mcguinessite, talc and hematite on coarsely cleavable dolomite.
Pharmacolite seems to be the most widespread white arsenate in the district after picropharmacolite.
(1996), small crystals of pharmacolite were found in the Umbria de Ramonete prospect, associated with chenevixite, but analytical data have not been provided, and the presence of pharmacolite seems very doubtful.
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