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 ?
The ROM's giant cerussite gem will be on permanent display in the new Teck Cominco Suite of Earth Sciences Galleries when it opens on Level 3.
The cerussite embodies all the key elements of a truly great gemstone: a historic locality, no inclusions, world-class cutting, large carat weight, and fantastic fire.
4 a - Pale gray cerussite (lead carbonate) in heavy-mineral concentrates taken from 2.
5 mm) yellow-green distorted octahedrons and cuboctahedrons of bromargyrite have been found on white micro-crystalline drusy quartz, cerussite and plattnerite in a localized area near the portal of the Brown Monster mine.
Late-stage colorless, transparent calcite crystals (to 6 mm), as simple rhombs to tapered tablets, can also be found growing in some of the cavities associated with cerussite and other secondary lead minerals.
At the Reward mine cyclic twins of cerussite were one of the earliest secondary minerals.
Chrysocolla also forms thin coatings on quartz pseudomorphs after cerussite.
Fourier transform infrared (FTIR) spectroscopy was used to distinguish between leadhillite, anglesite and cerussite.
The principal ore minerals at Roughton Gill were argentiferous galena and chalcopyrite with lesser, though occasionally valuable, amounts of pyromorphite, cerussite and malachite.
Pseudomorphs of pyromorphite after cerussite have been found, and plumbogummite forms epimorphs after small prisms of pyromorphite.
The Gobins' new cerussite specimens are reticulated "snowflakes" from the Nakhlak mine, clearly from the same occurrence as those marketed around 2001.
There were very extensive representations from the Broken Hill collections of Milton Lavers and Rod Sielecki, and I still cherish images of certain specimens of copper, rhodonite, pyromorphite,anglesite, smithsonite, cerussite .