Hureaulite is a

manganese Manganese is a chemical element with the symbol Mn and atomic number 25. It is a hard, brittle, silvery metal, often found in minerals in combination with iron. Manganese is a transition metal with a multifaceted array of industrial alloy use ...

phosphate In chemistry, a phosphate is an anion, salt, functional group or ester derived from a phosphoric acid. It most commonly means orthophosphate, a derivative of orthophosphoric acid . The phosphate or orthophosphate ion is derived from phospho ...

with the formula . It was discovered in 1825 and named in 1826 for the type locality, Les Hureaux,

Saint-Sylvestre, Haute-Vienne Saint-Sylvestre (; oc, Sint Sauvestre) is a Communes of France, commune in the Haute-Vienne Departments of France, department in the Nouvelle-Aquitaine Regions of France, region in west-central France. See also * Grandmontines * Communes of the ...

Limousin Limousin (; oc, Lemosin ) is a former administrative region of southwest-central France. On 1 January 2016, it became part of the new administrative region of Nouvelle-Aquitaine. It comprised three departments: Corrèze, Creuse, and Haute-Vienn ...

France France (), officially the French Republic ( ), is a country primarily located in Western Europe. It also comprises of Overseas France, overseas regions and territories in the Americas and the Atlantic Ocean, Atlantic, Pacific Ocean, Pac ...

. It is sometimes written as huréaulite, but the IMA does not recommend this for English language text.Burke, E. A. J. (2008): Tidying up Mineral Names: An IMA scheme for Suffixes, Hyphens and Diacritical Marks. Mineralogical Record, 39, 134 A complete series exists from

lithiophilite Lithiophilite is a mineral containing the element lithium. It is lithium manganese(II) phosphate with chemical formula . It occurs in pegmatites often associated with triphylite, the iron end member in a solid solution series. The mineral with in ...

, to

triphylite Triphylite is a lithium iron(II) phosphate mineral with the chemical formula LiFePO4.IMA-CNMNC List of Miner ...

, , including hureaulite, strengite, , stewartite, , and sicklerite, .Murdoch, Joseph (1943) Crystallography of Hureaulite. American Mineralogist 28: 19-24

Environment

Hureaulite is a

secondary Secondary may refer to: Science and nature * Secondary emission, of particles ** Secondary electrons, electrons generated as ionization products * The secondary winding, or the electrical or electronic circuit connected to the secondary winding i ...

mineral In geology and mineralogy, a mineral or mineral species is, broadly speaking, a solid chemical compound with a fairly well-defined chemical composition and a specific crystal structure that occurs naturally in pure form.John P. Rafferty, ed. ( ...

occurring in

granite Granite () is a coarse-grained (phaneritic) intrusive igneous rock composed mostly of quartz, alkali feldspar, and plagioclase. It forms from magma with a high content of silica and alkali metal oxides that slowly cools and solidifies undergro ...

pegmatites A pegmatite is an igneous rock showing a very coarse texture, with large interlocking crystals usually greater in size than and sometimes greater than . Most pegmatites are composed of quartz, feldspar, and mica, having a similar silicic comp ...

. At the type locality it occurs in a zone of altered

triphylite Triphylite is a lithium iron(II) phosphate mineral with the chemical formula LiFePO4.IMA-CNMNC List of Miner ...

, , in pegmatite. Typically occurs very late in the sequence of formation of secondary phosphate minerals.Moore, P B, and Araki, T (1973) Hureaulite: its atomic arrangement. American Mineralogist 58: 302-307. Associated at the type locality with

vivianite Vivianite () is a hydrated iron phosphate mineral found in a number of geological environments. Small amounts of manganese Mn2+, magnesium Mg and calcium Ca may substitute for iron Fe2+ in the structure.Gaines et al (1997) Dana’s New Mineral ...

, ; rockbridgeite, ; heterosite, and

cacoxenite Cacoxenite is an iron aluminium phosphate mineral with formula: Fe3+24Al(PO4)17O6(OH)12·17(H2O). Cacoxenite is associated with iron ores. The name comes from the Greek κăκός for "bad" or "evil" and ξένος for "guest" because the phosphor ...

, . It can be synthesised;Gerault, Y, Riou, A, and Cudennec, Y (1987) Acta Crystallographica (C) 43:1829 most natural hureaulites are Mn-rich compounds but extensive () solution is known for synthetic material.

Localities

The type locality is Les Hureaux, Saint-Sylvestre, Haute-Vienne,

. Hureaulite is also found in a granite pegmatite known for its phosphates in the Aimorés pegmatite district, at the Cigana claim in

Galiléia Galiléia is a municipality in the state of Minas Gerais in the Southeast region of Brazil. See also *List of municipalities in Minas Gerais This is a list of the municipalities in the state of Minas Gerais (MG), located in the Southeast Regi ...

, Doce valley,

Minas Gerais Minas Gerais () is a state in Southeastern Brazil. It ranks as the second most populous, the third by gross domestic product (GDP), and the fourth largest by area in the country. The state's capital and largest city, Belo Horizonte (literally ...

Brazil Brazil ( pt, Brasil; ), officially the Federative Republic of Brazil (Portuguese: ), is the largest country in both South America and Latin America. At and with over 217 million people, Brazil is the world's fifth-largest country by area ...

, formerly known as the Jocão Mine.

References

{{Commons Manganese(II) minerals Phosphate minerals Monoclinic minerals Minerals in space group 15