Anglesite

ANGLESITE (according to the place of the first find on the Anglesey island, within the United Kingdom * EN: anglesite; DE: Anglesit; FR: anglesite; ES: anglesita; RU: англезит) is the mineral of the class of the sulfates, Pb[SO4].

It contains 68.3% of Pb, and approximately 8.5% of BaO in barite-anglesite. It crystallizes into the orthorhombic crystal systems. The crystal structure is similar to the structure of barite; anglesite forms crystals of various habit, sometimes large, but more common are solid clusters, grainy and dense aggregates, crusts, porous masses. Anglesite is usually colourless or white, also gray, yellow, brown, and other colours; anglesite with tiny inclusions of galena is black. The lustre is of the diamond type. The hardness is 3-3.5; it is brittle. The density is approximately 6400 kilograms per cubic metre.

Anglesite is mainly supergene, develops together with cerussite on the account of galena within the zone of oxidation of the lead ores. Anglesite is beneficiated by flotation; the collectors are xanthates after sulfidation (pH is 9.5-11), fatty acids, heavy hydrocarbons; the controller of the environment is soda; the activators are the acidic sodium phosphate, sodium sulfide, NaHS; the depressors are the potassium dichromate, Na2S, Ca2+ and Mg2+ cations.