Minium (mineral)

Minium
Minium druse on cerussite from the Old Yuma Mine, Tucson Mountains, Arizona
General
Category	Oxide mineral
Chemical formula	Pb2+2Pb4+O4
Strunz classification	04.BD.05
Dana classification	07.02.08.01
Crystal symmetry	Tetragonal (4/m 2/m 2/m) ditetragonal dipyramidal
Unit cell	a = 8.811(5) Å, c = 6.563(3) Å; Z = 4
Identification
Color	Scarlet to brownish red, may have a yellowish tint
Crystal habit	Scaly; commonly as earthy, pulverulent masses
Crystal system	Tetragonal
Cleavage	Perfect on {110} and {010}
Mohs scale hardness	2.5
Luster	Dull to slightly greasy
Streak	Yellow-orange
Diaphaneity	Semitransparent
Specific gravity	8.9 - 9.2
Optical properties	Uniaxial
Refractive index	n = 2.42
References	[1][2][3]

Minium produced in the mine fire at Broken Hill

Minium is the naturally occurring form of lead tetroxide, Pb²⁺₂Pb⁴⁺O₄. It is a light to vivid red and may have brown to yellow tints. It typically occurs as scaly to earthy masses. It crystallizes in the tetragonal crystal system.^[1]

Minium is rare and occurs in lead mineral deposits that have been subjected to severe oxidizing conditions. It also occurs as a result of mine fires. It occurs associated with galena, cerussite, massicot, litharge, native lead, wulfenite and mimetite.^[1]

It occurs in a variety of worldwide areas in relatively small amounts. It occurs at Langhecke, Hesse; Badenweiler, Baden-Wurttemberg; Bleialf, Eifel district; Horhausen, Rhineland-Palatinate in Germany. It occurs at Mies, Slovenia; Leadhills, Lanarkshire, Scotland; Castelberg St. Avold, Moselle, France; from Langban, Varmland, Sweden; Sarrabus, Sardinia, Italy; near Anarak, Iran; and Tsumeb, Namibia. In the USA it is reported from the Jay Gould mine, Alturas County, Idaho; the Leadville district, Lake County, Colorado; in the Tonopah-Belmont mine, Maricopa County, Arizona. It also occurs in Eschuchapa and Guerrero, Mexico.^[1] Good specimens were produced by a mine fire at the Broken Hill mine in New South Wales, Australia.^[4]

It was named for the Minius River in northwest Spain. The name was originally applied to cinnabar, but after the material was determined to be a coating on the cinnabar, the name minium was applied to the red lead contaminant.^[2]

References

1. ^ ^{a b c d} Handbook of Mineralogy
2. ^ ^{a b} Mindat.org
3. ^ Webmineral data
4. ^ Mineral Galleries

This article about a specific oxide mineral is a stub. You can help Wikipedia by expanding it.v · Categories: Spinel group Lead minerals Pigments Inorganic pigments Tetragonal minerals Oxide mineral stubs Wikimedia Foundation. 2010. Игры ⚽ Поможем сделать НИР Minium Miniussi Look at other dictionaries: Minium — For the mineral, see Minium (mineral). Minium Scientific classification Domain: Eukaryota Kingdom: Archaeplastida Division …   Wikipedia Minium — aus Arizona, USA Chemische Formel Pb22+Pb4+O4 Mineralklasse Oxide 4.BD.05 (8. Aufl. 4/B.06 50) (nach Strunz) 07.02.08.01 (nach Dana) …   Deutsch Wikipedia Minium — Poudre de minium Général Nom IUPAC plomb(II,IV) oxyde Synonyme …   Wikipédia en Français minium — min i*um (?; 277), n. [L. minium, an Iberian word, the Romans getting all their cinnabar from Spain; cf. Basque armine[ a].] (Chem.) A heavy, brilliant red pigment, consisting of an oxide of lead, {Pb3O4}, obtained by exposing lead or massicot to …   The Collaborative International Dictionary of English mineral orange — minium min i*um (?; 277), n. [L. minium, an Iberian word, the Romans getting all their cinnabar from Spain; cf. Basque armine[ a].] (Chem.) A heavy, brilliant red pigment, consisting of an oxide of lead, {Pb3O4}, obtained by exposing lead or… …   The Collaborative International Dictionary of English mineral red — minium min i*um (?; 277), n. [L. minium, an Iberian word, the Romans getting all their cinnabar from Spain; cf. Basque armine[ a].] (Chem.) A heavy, brilliant red pigment, consisting of an oxide of lead, {Pb3O4}, obtained by exposing lead or… …   The Collaborative International Dictionary of English Lead tetroxide — Chembox new ImageFile = Red lead.jpg ImageSize = 250px ImageName = Red lead powder IUPACName = dilead(II) lead(IV) oxide OtherNames = Section1 = Chembox Identifiers CASNo = 1314 41 6 PubChem = SMILES = Section2 = Chembox Properties Formula =… …   Wikipedia 1314-41-6 — Minium Minium Poudre de minium Général Nom IUPAC plomb(II,IV) oxyde …   Wikipédia en Français Pb3O4 — Minium Minium Poudre de minium Général Nom IUPAC plomb(II,IV) oxyde …   Wikipédia en Français lead orthoplumbate — minium min i*um (?; 277), n. [L. minium, an Iberian word, the Romans getting all their cinnabar from Spain; cf. Basque armine[ a].] (Chem.) A heavy, brilliant red pigment, consisting of an oxide of lead, {Pb3O4}, obtained by exposing lead or… …   The Collaborative International Dictionary of English 18+ © Academic, 2000-2024 Contact us: Technical Support, Advertising Dictionaries export, created on PHP, Joomla, Drupal, WordPress, MODx. Mark and share Search through all dictionaries Translate… Search Internet Share the article and excerpts Direct link … Do a right-click on the link above and select “Copy Link”