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CLINOCLASITE

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Originally appearing in Volume V06, Page 528 of the 1911 Encyclopedia Britannica.
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CLINOCLASITE , a rare See also:

mineral consisting of the basic See also:copper arsenate (CuOH)3AsO4. It crystallizes in the See also:monoclinic 1 The word " climb " (O.E. climban), meaning strictly to ascend (or similarly descend) by progressive self-impulsion, with some apparent degree of laborious effort and by means of contact with the See also:surface traversed, is connected with the same See also:root as in " cleave " and " cling." For Alpine climbing, &c., see See also:MOUNTAINEERING. See also:system and possesses a perfect cleavage parallel to the basal See also:plane; this cleavage is obliquely placed with respect to the See also:prism faces of the crystal, hence the name clinoclase or clinoclasite, from Gr. KAivew, to incline, and Khav, to break. The crystals are deep See also:blue in See also:colour, and are usually radially arranged in hemispherical See also:groups. Hardness 22-3; specific gravity 4.36. The mineral was formerly found with other copper arsenates in the mines of the St See also:Day See also:district of See also:Cornwall. It has also been found near See also:Tavistock in See also:Devonshire, near Sayda (or Saida) in See also:Saxony, and in the Tintic district of See also:Utah. It is a mineral of secondary origin, having resulted by the decomposition of copper ores and See also:mispickel in the upper See also:part of mineral See also:veins. The corresponding basic copper phosphate, (CuOH)3PO4, is the mineral pseudomalachite, which occurs as See also:green botryoidal masses resembling See also:malachite in See also:appearance.

End of Article: CLINOCLASITE

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