pharmacoliten.
/ˈfɑːməkəlʌɪt/, U.S. /ˈfɑrməkəˌlaɪt/ Mineralogy.
A mineral of the monoclinic crystal system consisting of a hydrated calcium arsenate, CaHAsO4.2H2O, and usually occurring as white or greyish silky fibres.† magnesian pharmacolite n. Obsolete = berzeliite n. at berzelianite n. Derivatives.
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pharmacolite1804
haidingerite1827
vladimirite1954
1804 tr. M. H. Klaproth Analyt. Ess. Chem. Knowl. Mineral Substances II. cvi. 221 Mr. Karsten thought the name Pharmacolite, suiting this fossil, because of the considerable quantity of arsenical, or poisonous acid which it contains.
1815 W. Phillips Outl. Mineral. & Geol. (1818) 27 Lime combined with the arsenic acid, forms a mineral called Pharmacolite.
1844 J. D. Dana Syst. Mineral. (ed. 2) 239 Magnesian pharmacolite... This mineral was called Berzelite by Kühn..; but this name is already appropriated to another mineral.
1888 Amer. Naturalist 22 1113 Dufet prepared pharmacolite by allowing solutions of calcium nitrate and di-sodium arsenate to diffuse slowly into each other.
1951 C. Palache et al. Dana's Syst. Mineral. (ed. 7) II. 709 Haidingerite... Found with pharmacolite and other arsenates as an oxidation product of arsenical ores.
1999 Austral. Jrnl. Earth Sci. 46 861 Weathering of waste material..leads to the formation of water soluble, As-bearing mineral salts (pharmacolite, arsenolite, krautite) and sulfates.
This entry has been updated (OED Third Edition, December 2005; most recently modified version published online March 2022).
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