Stanfieldite

A valid IMA mineral species

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Photos of Stanfieldite (2)

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Stanfieldite, etc.

Finmarken meteorite, Porsanger, Troms og Finnmark, Norway

Stanfieldite, etc.

Estherville meteorite, Emmet County, Iowa, USA

Stanfieldite, etc.

Finmarken meteorite, Porsanger, Troms og Finnmark, Norway

Stanfieldite, etc.

Estherville meteorite, Emmet County, Iowa, USA

Stanfieldite, etc.

Finmarken meteorite, Porsanger, Troms og Finnmark, Norway

Stanfieldite, etc.

Estherville meteorite, Emmet County, Iowa, USA

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About StanfielditeHide

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Stanley Fields 1934

Formula:

Ca₄Mg₅(PO₄)₆

formula likely to be modified (Britvin et al 2020) to: Ca₇M₂Mg₉(PO₄)₁₂ (where M denotes Ca, Mg and Fe); see below for details

Colour:

Amber to pale red

Hardness:

4½ - 5

Specific Gravity:

3.15

Crystal System:

Monoclinic

Name:

Named after Stanley Field, Chairman, Board of Trustees, Field Museum of Natural History, USA (born May 13, 1875, Manchester England; died Chicago Oct. 28, 1964)

Type Locality:

ⓘ Estherville meteorite, Emmet County, Iowa, USA

Possibly represents more than a single species:

- "~Ca₇(CaMg)Mg₉(PO₄)₁₂ ≡ Ca₄Mg₅(PO₄)₆", that is, the "Mindat Formula" (Brahin and lots of other meteorites)
- Ca₇Mg₂Mg₉(PO₄)₁₂ for material from Lunar "rusty rock" 66095 (Britvin et al. 2020).

Unique IdentifiersHide

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Mindat ID:

3745

Long-form identifier:

mindat:1:1:3745:3

GUID
(UUID V4):

192ec3bc-b86d-457c-8ce3-f426faa06f95

Classification of StanfielditeHide

Mineral SymbolsHide

Physical Properties of StanfielditeHide

Optical Data of StanfielditeHide

Type:

Biaxial (+)

RI values:

n_α = 1.594 - 1.619 n_β = 1.596 - 1.622 n_γ = 1.604 - 1.631

2V:

Measured: 50° to 60°, Calculated: 54° to 62°

Max Birefringence:

δ = 0.010 - 0.012

Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.

Surface Relief:

Moderate

Dispersion:

r < v

Chemical Properties of StanfielditeHide

Crystallography of StanfielditeHide

Crystal StructureHide

X-Ray Powder DiffractionHide

Geological EnvironmentHide

Type Occurrence of StanfielditeHide

Synonyms of StanfielditeHide

Other Language Names for StanfielditeHide

Common AssociatesHide

Related Minerals - Strunz-mindat GroupingHide

Other InformationHide

Internet Links for StanfielditeHide

References for StanfielditeHide

Reference List:

Year ⬇Author Title Publisher

http://forum.amiminerals.it/viewtopic.php?f=5&t=16291

Fuchs, L.H. (1967) Stanfieldite, a new phosphate mineral from stony iron meteorites. Science: 158: 910-911.

Fuchs, L.H. (1967) Stanfieldite, a new phosphate mineral from stony iron meteorites. Science: 158: 910-911.

Fleischer, M. (1968) New mineral names. American Mineralogist: 53: 507-511 (508).

Dickens, B., Brown, W.E. (1971) The crystal structure of Ca7Mg9(Ca,Mg)2(PO4)12. Tschermaks Mineralogische und Petrographische Mitteilungen: 16: 79-104.

Britvin, S.N., Krzhizhanovskaya, M.G., Bocharov, V.N., Obolonskaya, E.V. (2020) Crystal Chemistry of Stanfieldite, Ca₇M₂Mg₉(PO4)₁₂ (M = Ca, Mg, Fe²⁺), a Structural Base of Ca3Mg3(PO4)4 Phosphors. Crystals: 10: 464.

Localities for StanfielditeHide

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This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

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- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for references and further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.

Austria
Tyrol Innsbruck Igls ⓘ Goldbichl prehistoric ritual immolation site slag locality	Philipp Schneider, Peter Tropper, Reinhard Kaindl (2013): The formation of phosphoran olivine and stanfieldite from the pyrometamorphic breakdown of apatite in slags from a prehistoric ritual immolation site (Goldbichl, Igls, Tyrol, Austria). Mineralogy and Petrology 107, 327-340.
Belarus
Gomel Region ⓘ Brahin meteorite	Dymkin, A.M., Vilisov, V.A., Emelianov, G.I., Iudin, I.A., Loginov, V.N. [Дымкин, A.M., Вилисов, В.А., Емельянов, Г.И., Юдин, И.А., Логинов, Б.Н.] (1984) New data on the Bragin pallasite [Новые данные о палласите Брагин]. Doklady Akademii Nauk BSSR [Академии наук БССР], 28 (5), 445-447 (in Russian) Sonzogni, Y., Devouard, B., Provost, A., Devidal, J.-L. (2009) Olivine-hosted melt inclusions in the Brahin pallasite. 72nd Annual Meteoritical Society Meeting, 5070.pdf
Canada
Saskatchewan Springwater ⓘ Springwater meteorite	http://miac.uqac.ca/MIAC/iron.htm Davis, A. M., & Olsen, E. J. (1989, March). The origin of phosphate minerals in the Eagle Station and Springwater pallasites. In Lunar and Planetary Science Conference (Vol. 20, p. 220).
Chile
Antofagasta Antofagasta Province Augusta Victoria Imilac ⓘ Imilac meteorite	Fuchs, L.H. (1967) Stanfieldite, a new phosphate mineral from stony iron meteorites. Science: 158: 910-911. Fleischer, M. (1968) New mineral names. American Mineralogist: 53: 507-511 (508).
China
Inner Mongolia Xilingol League (Xilinguole Prefecture) East Ujimqin Banner (Dongwuzhumuqin Co.; Dongwu Qi) ⓘ Dong Ujimqin Qi meteorite	Grossman, J. N. [Ed.] (1997). The Meteoritical Bulletin, No. 81, 1997 July. Meteoritics & Planetary Science, 32, #4, Supplemental, A159-166. (July 1997). Kong, P., Su, W., Li, X., Spettel, B., Palme, H. & Tao, K. (2008) Geochemistry and origin of metal, olivine clasts, and matrix in the Dong Ujimqin Qi mesosiderite: Meteoritics & Planetary Science 43(3): 451-460. (March 2008)
Germany
Bavaria Upper Bavaria Traunstein District ⓘ Chiemsee crater	Neumair, A., Waitzinger, M. & Finger, F. (2016) Interesting glass coatings on cobbles and rock fragments from the Alpine Foreland, SE-Bavaria, Germany, and their possible origin. Poster-Neumair-GeoTirol-2016
Israel
Southern District (HaDarom District) Tamar Regional Council Hatrurim Basin ⓘ Aravaite type locality	Sergey N. Britvin, Irina O. Galuskina, Natalia S. Vlasenko, Oleg S. Vereshchagin, Vladimir N. Bocharov, Maria G. Krzhizhanovskaya, Vladimir V. Shilovskikh, Evgeny V. Galuskin, Yevgeny Vapnik, and Edita V. Obolonskaya (xxxx) Keplerite, Ca9(Ca0.5□0.5)Mg(PO4)7, a new meteoritic and terrestrial phosphate isomorphous with merrillite, Ca9NaMg(PO4)7. American Mineralogist 10.2138/am-2021-7834 Britvin, S.N., Galuskina, I.O., Vlasenko, N.S., Vereshchagin, O.S., Bocharov, V.N., Krzhizhanovskaya, M.G., Shilovskikh, V.V., Galuskin, E.V., Vapnik, Y., Obolonskaya, E.V. (2021) Keplerite, Ca9(Ca0.5□0.5)Mg(PO4)7, a new meteoritic and terrestrial phosphate isomorphous with merrillite, Ca9NaMg(PO4)7. American Mineralogist: ??: ??.
Japan
Kochi Prefecture Kami City ⓘ Zaisho meteorite	Buseck, P. R. & Clark, J. (1982) The Zaisho Pallasite, a Bearer of Pyroxene and Phosphoran Olivine (abstract): Meteoritics 17 (4):189-190. (Dec 1982)
Mexico
Baja California Sur Mulegé Municipality Santa Rosalía ⓘ Santa Rosalía meteorite	Fuchs, L.H. (1967) Stanfieldite, a new phosphate mineral from stony iron meteorites. Science: 158: 910-911. Fleischer, M. (1968) New mineral names. American Mineralogist: 53: 507-511 (508).
Norway
Troms og Finnmark Porsanger ⓘ Finmarken meteorite (Alta meteorites)	Fuchs, L.H. (1967) Stanfieldite, a new phosphate mineral from stony iron meteorites. Science, 158, 910-911 Fleischer, M. (1968) New mineral names. American Mineralogist, 53 507-511 (508).
Russia
Chukotka Autonomous Okrug Chaunskii District (Chaun) ⓘ Chaunskij meteorite (Chaunskiy meteorite)	Zaslavskaya, N. I., Petaev, M. I., Kononkova, N. N., & Barsukova, L. D. (1991, March). Mineralogy of Phosphate-Silicate Inclusions in the Chaunskij Iron. In Lunar and Planetary Science Conference (Vol. 22). p418
Magadan Oblast Severo-Evensky District ⓘ Omolon meteorite	Sharygin, V. V., Kovyazin, S. V. & Podgornykh, N. M. (2006) Mineralogy of Olivine-hosted Inclusions from the Omolon Pallasite (abstract). Lunar and Planetary Science Conference, XXXVII, abstract no.1235. (Mar 2006) Lavrentjeva, Z. A. & Lyul, A. Yu. (2013) REE and Some Other Trace Elements Distribution in the Minerals of the Pallasites: Lunar and Planetary Science Conference XLIV, LPI Contribution No. 1719, pdf#114. (Mar 2013)
USA
Arkansas Jackson County ⓘ Newport meteorite	Fuchs, L.H. (1967) Stanfieldite, a new phosphate mineral from stony iron meteorites. Science: 158: 910-911. Fleischer, M. (1968) New mineral names. American Mineralogist: 53: 507-511 (508). Buseck, P.R., Holdsworth, E. (1977) Phosphate minerals in pallasite meteorites. Mineralogical Magazine: 41(317): 91-102.
Iowa Emmet County ⓘ Estherville meteorite (TL)	Fuchs, L.H. (1967) Stanfieldite, a new phosphate mineral from stony iron meteorites. Science: 158: 910-911. Fuchs, L.H. (1967) Abstract of paper presented at the twelfth annual meeting: Stanfieldite, a new phosphate mineral in stony-iron meteorites. The Canadian Mineralogist: 9: 289-290. Fleischer, M. (1968) New mineral names. American Mineralogist: 53: 507-511 (508). Witzke, T. (2011): Stanfieldit-Kristalle aus dem Meteoriten Estherville (Mesosiderit A 3/4). Aufschluss 62, 119-123.
Kentucky Carroll County ⓘ Eagle Station meteorite	www.lpi.usra.edu/meetings/metsoc2003/pdf/5007.pdf. Davis, A. M., & Olsen, E. J. (1989, March). The origin of phosphate minerals in the Eagle Station and Springwater pallasites. In Lunar and Planetary Science Conference (Vol. 20, p. 220).
Christian County ⓘ Mount Vernon meteorite	Fuchs, L.H. (1967) Stanfieldite, a new phosphate mineral from stony iron meteorites. Science: 158: 910-911. Fleischer, M. (1968) New mineral names. American Mineralogist: 53: 507-511 (508). Buseck, P.R., Holdsworth, E. (1977) Phosphate minerals in pallasite meteorites. Mineralogical Magazine: 41(317): 91-102.
Wyoming Laramie County ⓘ Albin (pallasite) meteorite	Fuchs, L.H. (1967) Stanfieldite, a new phosphate mineral from stony-iron meteorites. Science, 158, 910-911 Fleischer, M. (1968) New mineral names. American Mineralogist, 53, 507-511 (508) Buseck, P.R. (1977) Pallasite meteorites - Mineralogy, petrology and geochemistry. Geochimica et Cosmochimica Acta, 41, 711-740.