Sample of cerussite-bearing quartzite

Cerussite (also known as Horn silver, Lead carbonate, White lead ore) is a mineral consisting of lead carbonate (PbCO₃), and an important ore of lead. The name is from the Latin cerussa, white lead. Cerussa nativa was mentioned by K Gesner in 1565, and in 1832 FS Beudant applied the name cruse to the mineral, whilst the present form, cerussite, is due to W. Haidinger (1845). Miners' names in early use were lead-spar and white-lead-ore. Sample of cerussite-bearing quartzite [1] File history Legend: (cur) = this is the current file, (del) = delete this old version, (rev) = revert to this old version. ... Sample of cerussite-bearing quartzite [1] File history Legend: (cur) = this is the current file, (del) = delete this old version, (rev) = revert to this old version. ... Quartzite Quartzite is a hard, metamorphic rock which was originally sandstone. ... This article is about minerals in the geologic sense; for nutrient minerals see dietary mineral; for the band see Mineral (band). ... This article is about the chemical element. ... Carbonate is an anion with a charge of -2 and an empirical formula of CO32-. For an aqueous solution, carbonate exists in three forms. ... Iron ore (Banded iron formation) Manganese ore Lead ore Gold ore An ore is a mineral deposit containing a metal or other valuable resource in economically viable concentrations. ... Latin is an ancient Indo-European language originally spoken in the region around Rome called Latium. ... François Sulpice Beudant (September 5, 1787 - December 10, 1850), French mineralogist and geologist, was born in Paris. ... Wilhelm Karl, Ritter von Haidinger (February 5, 1795 - March 19, 1871), was an Austrian mineralogist, geologist and physicist. ...

Cerussite crystallizes in the orthorhombic system and is isomorphous with aragonite. Like aragonite it is very frequently twinned, the compound crystals being pseudo-hexagonal in form. Three crystals are usually twinned together on two faces of the prism, producing six-rayed stellate groups with the individual crystals intercrossing at angles of nearly 60°. Crystals are of frequent occurrence and they usually have very bright and smooth faces. The mineral also occurs in compact granular masses, and sometimes in fibrous forms. It is usually colorless or white, sometimes grey or greenish in tint and varies from transparent to translucent with an adamantine lustre. It is very brittle, and has a conchoidal fracture. It has a Mohs hardness of 3 to 3.75 and a specific gravity of 6.5. A variety containing 7 % of zinc carbonate, replacing lead carbonate, is known as iglesiasite, from Iglesias in Sardinia, where it is found. Quartz crystal A crystal is a solid in which the constituent atoms, molecules, or ions are packed in a regularly ordered, repeating pattern extending in all three spatial dimensions. ... In crystallography, the orthorhombic crystal system is one of the 7 lattice point groups. ... Aragonite Aragonite is a polymorph of the mineral calcite, both having the chemical composition CaCO3. ... It has been suggested that twin boundary be merged into this article or section. ... Conchoid can refer to: Conchoid curve, an equation discovered by the Greek mathematician Nicomedes Conchoidal fracture, a breakage pattern characteristic to certain minerals and glasses. ... Mohs scale of mineral hardness characterizes the scratch resistance of various minerals through the ability of a harder material to scratch a softer. ... Relative density (also known as specific gravity) is a measure of the density of a material. ... Sardinia (Sardegna in Italian, Sardigna, Sardinna or Sardinnia in the Sardinian language, Sardenya in Catalan), is the second largest island in the Mediterranean Sea (Sicily is the largest), between Italy, Spain and Tunisia, south of Corsica. ...

The mineral may be readily recognized by its characteristic twinning, in conjunction with the adamantine lustre and high specific gravity. It dissolves with effervescence in dilute nitric acid. Before the blowpipe it fuses very readily, and gives reactions for lead. R-phrases , S-phrases , , , , Flash point not applicable RTECS number QU5775000 Supplementary data page Structure and properties n, εr, etc. ...

Finely crystallized specimens have been obtained from the Friedrichssegen mine near Ems in Nassau, Johanngeorgenstadt in Saxony, Mies in Bohemia, Phenixville in Pennsylvania, Broken Hill, New South Wales; and several other localities. Delicate acicular crystals of considerable length were found long ago in the Pentire Glaze mine near St Minver in Cornwall. It is often found in considerable quantities, and contains as much as 77.5% of lead. The Ems (German; Dutch: Eems) is a river in northwestern Germany and northeastern Netherlands. ... Nassau, Germany ... The Free State of Saxony (German: Freistaat Sachsen; Sorbian: Swobodny Stata Sakska) is at a land area of 18,413 km² and a population of 4. ... Village center Mies is a village in the Vaud canton of Switzerland, on the border with the canton of Geneva. ... Bohemia This article is about the historical region in central Europe; for other uses, see Bohemia (disambiguation). ... Official language(s) None Capital Harrisburg Largest city Philadelphia Area  - Total  - Width  - Length  - % water  - Latitude  - Longitude Ranked 33rd 119,283 km² 255 km 455 km 2. ... Broken Hill Post Office Royal Exchange Hotel, Broken Hill Broken Hill street, with the Indian Pacific and the actual broken hill visible in the background Broken Hill Broken Hill (31°57′S 141°27′E) is an isolated mining city and Local Government Area in the far west of outback... A small village in North Cornwall, England See Also Wadebridge Categories: | ... Motto: Onen hag oll (Cornish: One and all) Geography Status Ceremonial and (smaller) Non-metropolitan county Region South West England Population - Total (2004 est. ...

"White lead" is the key ingredient in lead paint. Lead paint is paint containing lead, which was used until the 1970s as a white pigment. ...

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References

• This article incorporates text from the 1911 Encyclopædia Britannica, a publication in the public domain.