Hureaulite is a manganesephosphate with the formula Mn2+5(PO3OH)2(PO4)2·4H2O. It was discovered in 1825 and named in 1826 for the type locality, Les Hureaux, Saint-Sylvestre, Haute-Vienne, Limousin, France. It is sometimes written as huréaulite, but the IMA does not recommend this for English language text.[7]
Hureaulite
Hureaulite from the Cigana Claim, Conselheiro Pena, Minas Gerais, Brazil. Specimen size 2.8 cm.
A complete series exists from lithiophilite, LiMn2+PO4 to triphylite, LiFe2+PO4, including hureaulite, strengite, FePO4·2H2O, stewartite, Mn2+Fe3+2(OH,PO4)2·8H2O, and sicklerite, (LiMn2+,Fe3+)PO4.[8]
Environmentedit
Hureaulite is a secondarymineral occurring in granitepegmatites.[6] At the type locality it occurs in a zone of altered triphylite, LiMn2+PO4, in pegmatite. Typically occurs very late in the sequence of formation of secondary phosphate minerals.[9] Associated at the type locality with vivianite, Fe2+3(PO4)2·8H2O; rockbridgeite, Fe2+Fe3+4(PO4)3(OH)5; heterosite, (Fe3+,Mn3+)PO4 and cacoxenite, Fe3+24AlO6(PO4)17(OH)12·17H2O. It can be synthesised;[10] most natural hureaulites are Mn-rich compounds but extensive (Mn,Fe) solution is known for synthetic material.[9]
Localitiesedit
The type locality is Les Hureaux, Saint-Sylvestre, Haute-Vienne, Limousin, France. Hureaulite is also found in a granite pegmatite known for its phosphates in the Aimorés pegmatite district, at the Cigana claim in Galiléia, Doce valley, Minas Gerais, Brazil, formerly known as the Jocão Mine.[4]
^Shigley and Brown (1985) American Mineralogist 70:395
^ abRoberts, Campbell and Rapp (1990) Encyclopedia of Minerals, 2nd edition
^Burke, E. A. J. (2008): Tidying up Mineral Names: An IMA scheme for Suffixes, Hyphens and Diacritical Marks. Mineralogical Record, 39, 134
^Murdoch, Joseph (1943) Crystallography of Hureaulite. American Mineralogist 28: 19-24
^ abMoore, P B, and Araki, T (1973) Hureaulite: its atomic arrangement. American Mineralogist 58: 302-307.
^Gerault, Y, Riou, A, and Cudennec, Y (1987) Acta Crystallographica (C) 43:1829
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March 17, 2024
hureaulite, manganese, phosphate, with, formula, po3oh, 4h2o, discovered, 1825, named, 1826, type, locality, hureaux, saint, sylvestre, haute, vienne, limousin, france, sometimes, written, huréaulite, does, recommend, this, english, language, text, from, cigan. Hureaulite is a manganese phosphate with the formula Mn2 5 PO3OH 2 PO4 2 4H2O It was discovered in 1825 and named in 1826 for the type locality Les Hureaux Saint Sylvestre Haute Vienne Limousin France It is sometimes written as hureaulite but the IMA does not recommend this for English language text 7 HureauliteHureaulite from the Cigana Claim Conselheiro Pena Minas Gerais Brazil Specimen size 2 8 cm GeneralCategoryPhosphate mineralsFormula repeating unit Mn2 5 PO3OH 2 PO4 2 4H2OIMA symbolHur 1 Strunz classification8 CB 10 10 ed 7 C 04 10 8 ed Dana classification39 2 1 1Crystal systemMonoclinicCrystal classPrismatic 2 m same H M symbol Space groupC2 cUnit cella 17 594 10 A b 9 086 5 A c 9 404 5 A b 96 67 8 Z 4IdentificationFormula mass728 65 g molColourOrange red yellow brown grey or nearly colourlessCrystal habitCrystals are short prismatic parallel to 100 or equant sometimes thick tabular also massive or imperfectly fibrous 2 Cleavage 100 goodFractureUnevenTenacityBrittleMohs scale hardness3 5LustreVitreous to greasyStreakNearly whiteDiaphaneityTransparent to translucentSpecific gravity3 18 3 2 measured 3 23 calculated Optical propertiesBiaxial Refractive indexna 1 640 1 654 nb 1 649 1 659 ng 1 655 1 662Birefringenced 0 012PleochroismX colourless Y yellow to pale rose Z reddish yellow to reddish brown2V anglegreater than 60 Dispersionr lt v very strong 3 SolubilityEasily soluble in acids References 3 4 5 6 A complete series exists from lithiophilite LiMn2 PO4 to triphylite LiFe2 PO4 including hureaulite strengite FePO4 2H2O stewartite Mn2 Fe3 2 OH PO4 2 8H2O and sicklerite LiMn2 Fe3 PO4 8 Environment editHureaulite is a secondary mineral occurring in granite pegmatites 6 At the type locality it occurs in a zone of altered triphylite LiMn2 PO4 in pegmatite Typically occurs very late in the sequence of formation of secondary phosphate minerals 9 Associated at the type locality with vivianite Fe2 3 PO4 2 8H2O rockbridgeite Fe2 Fe3 4 PO4 3 OH 5 heterosite Fe3 Mn3 PO4 and cacoxenite Fe3 24AlO6 PO4 17 OH 12 17H2O It can be synthesised 10 most natural hureaulites are Mn rich compounds but extensive Mn Fe solution is known for synthetic material 9 Localities editThe type locality is Les Hureaux Saint Sylvestre Haute Vienne Limousin France Hureaulite is also found in a granite pegmatite known for its phosphates in the Aimores pegmatite district at the Cigana claim in Galileia Doce valley Minas Gerais Brazil formerly known as the Jocao Mine 4 References edit Warr L N 2021 IMA CNMNC approved mineral symbols Mineralogical Magazine 85 3 291 320 Bibcode 2021MinM 85 291W doi 10 1180 mgm 2021 43 S2CID 235729616 Murdoch Joseph 1942 Contributions to the Crystallography of Hureaulite American Mineralogist 27 228 a b Gaines et al 1997 Dana s New Mineralogy Eighth Edition a b http www mindat org min 1952 html Mindat org Shigley and Brown 1985 American Mineralogist 70 395 a b Roberts Campbell and Rapp 1990 Encyclopedia of Minerals 2nd edition Burke E A J 2008 Tidying up Mineral Names An IMA scheme for Suffixes Hyphens and Diacritical Marks Mineralogical Record 39 134 Murdoch Joseph 1943 Crystallography of Hureaulite American Mineralogist 28 19 24 a b Moore P B and Araki T 1973 Hureaulite its atomic arrangement American Mineralogist 58 302 307 Gerault Y Riou A and Cudennec Y 1987 Acta Crystallographica C 43 1829 nbsp Wikimedia Commons has media related to Hureaulite Retrieved from https en wikipedia org w index php title Hureaulite amp oldid 1208772632, wikipedia, wiki, book, books, library,
