cerussite


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cerussite

(sēr`əsīt), colorless to white or gray mineral, sometimes yellowish or greenish, transparent to opaque, very brittle, crystallizing in the orthorhombic system and occurring also in granular and massive form. It is a carbonate of lead, PbCO3, formed by the action of carbonate and bicarbonate solutions on galenagalena
or lead glance,
lustrous, blue-gray mineral crystallizing usually in cubes, sometimes in octahedrons. It is the most important ore and the principal source of lead.
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. It is an important ore of lead widely distributed throughout the world and found associated with galena and other lead minerals.

Cerussite

 

a mineral; lead carbonate, PbCO3. Cerussite contains minute amounts of Ca, Zn, Sr, and Mg. It crystallizes in the orthorhombic system, forming columnar, dipyramidal, or tabular crystals. It often occurs in the form of stellate clusters of twinned or triplet crystals. It is usually found in the form of granular or sinter aggregates. A white, yellowish, or brownish gray mineral, it has a density of 6,400–6,600 kg/m3 and a hardness of 3.0–3.5 on Mohs’ scale. Cerussite is brittle. Under an electron beam it often gives off a greenish blue light.

Cerussite is a common secondary mineral in the zone of oxidation of lead deposits and occurs in association with anglesite, vanadinite, limonite, and other minerals. It is used mainly as an ore of lead and in the production of white mineral pigments. Deposits in the USSR have been found in Eastern Transbaikalia, the Altai, and Kazakhstan. There are also deposits of cerussite in the United States and Australia.

cerussite

[sə′rəs‚īt]
(mineralogy)
PbCO3 A yellow or white member of the aragonite group occurring in orthorhombic crystals; produced by the action of carbon dioxide on lead ore.
References in periodicals archive ?
He also had a few small specimens of cerussite on drusy velvet malachite from Bou Beker, Morocco--also new, and very cute.
A gallery highlight is the famed 900-carat Light of the Desert, the largest faceted cerussite gem in the world.
Mostly cerussite, he says, with lots of silver in it.
The pigments, they found, were bone white, lead white, cerussite, quartz, cinnabar, malachite, charcoal black, copper salts, Chinese purple and azurite.
Dam a triple winner at 2-3 years, successful at Listed level, and a half-sister to Gr1 winner Al Hareb, Gr3 winner Dr Somerville, and Listed winners Rising and Cerussite.
Within the oxidized zones, the primary sulfide minerals were commonly converted to limonite, pyrolusite, cerussite, anglesite, argentojarosite and plumbojarosite (basic sulfates of Fe), and native silver, with traces of malachite and azurite.
Only a few of the phases are stoichiometric minerals (anglesite = Pb sulfate, cerussite = Pb carbonate, galena = Pb sulfide, native Pb = Pb), whereas the others are nonstoichiometric associations of various metals and other elements.
These were derived from galena and cerussite, minerals mined around the Red Sea.
Examples of these are synthetic cerussite or lead carbonite ([PbCO.
Separately, rare cerussite crystals, with attached native silver wire were found recently in the old Bunker Hill lead/zinc/silver mine at Kellogg.
Ore minerals include gold, silver, chalcopyrite (CuFeS2), galena (PbS), bornite (CuFeS4), covellite (CuS), chalcocite (Cu2S), anglesite (PbSO4), sphalerite (ZnS), argentite (Ag2S), cerussite (PbCO3) and smithsonite (ZnCO3).
Generally speaking, the Leichts were offering exceptional Tsumeb specimens from the Grosch and Moller collections and cerussite from the Eileen Kokinos collection, both of these collections dating back to the 1960s.