Sample of cerussite-bearing quartzite

Cerussite (also known as lead carbonate or 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 F. S. 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. ... Minerals are natural compounds formed through geological processes. ... For PB or pb as an abbreviation, see PB. General Name, Symbol, Number lead, Pb, 82 Chemical series poor metals Group, Period, Block 14, 6, p Appearance bluish gray Atomic mass 207. ... In organic chemistry, a carbonate is a salt of carbonic acid. ... Iron ore (Banded iron formation) Manganese ore Lead ore Gold ore An ore is a volume of rock containing components or minerals in a mode of occurrence which renders it valuable for mining. ... Latin is an ancient Indo-European language originally spoken in Latium, the region immediately surrounding Rome. ... 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. The mineral 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 Copper(II) sulfate and iodine crystal Synthetic bismuth crystal Insulin crystals Gallium, a metal that easily forms large single crystals A huge monocrystal of potassium dihydrogen phosphate grown from solution by Saint-Gobain for the megajoule laser of CEA. In chemistry and mineralogy, a crystal is a solid... 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 (pronounced ; Italian: Sardegna; Sardinian: Sardigna or Sardinna) is the second-largest island in the Mediterranean Sea (after Sicily). ...

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. A blowpipe test will cause it to fuse very readily, and gives inidications for lead. The chemical compound nitric acid (HNO3), also known as aqua fortis and spirit of nitre, is an aqueous solution of hydrogen nitrate (anhydrous nitric acid). ...

As crystaline ore

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. Image File history File linksMetadata Download high-resolution version (1600x1200, 647 KB) A sample of Cerussite on display in Yale Universitys Kline Geology building. ... Image File history File linksMetadata Download high-resolution version (1600x1200, 647 KB) A sample of Cerussite on display in Yale Universitys Kline Geology building. ... // For the river in Hampshire, see River Ems. ... Nassau, Germany ... Johanngeorgenstadt is a town in the Aue-Schwarzenberg district, in the Free State of Saxony, Germany. ... The Free State of Saxony (German: Freistaat Sachsen; Sorbian: Swobodny Stat Sakska) is the easternmost federal state of Germany. ... Village center Mies is a village in the Vaud canton of Switzerland, on the border with the canton of Geneva. ... Flag of Bohemia Bohemia (Czech: ; German: ) is a historical region in central Europe, occupying the western and middle thirds of the Czech Republic. ... Official language(s) English, Pennsylvania Dutch Capital Harrisburg Largest city Philadelphia Area  Ranked 33rd  - Total 46,055 sq mi (119,283 km²)  - Width 280 miles (455 km)  - Length 160 miles (255 km)  - % water 2. ... This article or section is not written in the formal tone expected of an encyclopedia article. ... St Minver is a small village in North Cornwall, United Kingdom. ... Cornwall (Cornish: Kernow) is a county in South West England, United Kingdom, on the peninsula that lies to the west of the River Tamar. ...

Lead(II) Carbonate is insoluble in water.

Commerical uses

"White lead" is the key ingredient in the (now discontinued) lead paints. Ingestion of lead-based paint chips is the most common cause of lead poisoning in children.^[1] This article or section does not cite its references or sources. ... Lead poisoning is a medical condition, also known as saturnism, plumbism or painters colic, caused by increased blood lead levels. ...

Both "white lead" and lead acetate have been used in cosmetics throughout history, though this practice has ceased in Western Countries.^[2] Lead acetate (Trihydrate Pb(CH3COO)2·3H2O) is a white crystalline substance made by dissolving lead in acetic acid. ...

Crystals of cerussite, a secondary lead ore

Image File history File links Download high-resolution version (770x630, 156 KB) Source: Chris Ralph. ... Image File history File links Download high-resolution version (770x630, 156 KB) Source: Chris Ralph. ...

External links

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References

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

1. ^ Lightening the Lead Load in Children as cited in Lead Poisoning in Children, and California Poison Control System: Lead Poisoning
2. ^ Gunn, Fenja. (1973). The Artificial Face: A History of Cosmetics. — as cited in Leisure Activities of an 18th Century Lady and Reading Our Lips: The History of Lipstick Regulation in Western Seats of Power