pharmacolite


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pharmacolite

[fär′mak·ə‚līt]
(mineralogy)
CaH(AsO4)·2H2O A white to grayish monoclinic mineral composed of hydrous acid arsenate of calcium, occurring in fibrous form.
References in periodicals archive ?
Guilbert and Schubnel (1969) identified pharmacolite as typical colorless crystals from Vein 7, Bou Azzer: flat, elongated crystals shaped like little boats to 2 mm which form sheaf-like aggregates on quartz, associated with picropharmacolite, erythrite in two generations, and more rarely lavendulan.
A few years ago, on the 40-meter level in Bou Azzer-East, excellent "little boat"-shaped pharmacolite crystals were discovered: colorless to white sheaves and fans to 2 mm are associated with reddish-pink erythrite spherules which reach 1 mm.
At Mechoui and Ightem, dense gray-white balls of pharmacolite have been found intergrown with soapy-lustered picropharmacolite sprays and matte-black spherules of heterogenite.
When the old tunnels here were re-opened in 2000, similar specimens were collected, showing newly formed erythrite and white arsenates including sainfeldite, pharmacolite and picropharmacolite.