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Iddingsite

Formula:
MgO·Fe
 
2
O
 
3
·3SiO
 
2
·4H
 
2
O
System:OrthorhombicHardness:3
Name:
Named by Andrew Cowper Lawson in 1893 for one of the great American petrologists Joseph Paxson Iddings [January 21, 1857 Baltimore, Maryland - September 8, 1920]. He was with the United States Geological Survey and later professor at the University of Chicago. He was one of the great petrologists of his era.


A common alteration product of Olivine, often observed in thin sections.

A mixture of clay minerals (chlorite group, smectite group), iron oxides and ferrihydrides.

Classification of Iddingsite

IMA status:Not Approved
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Physical Properties of Iddingsite

Hardness (Mohs):3

Crystallography of Iddingsite

Crystal System:Orthorhombic

Optical Data of Iddingsite

Type:Biaxial (-)
RI values: nα = 1.670 - 1.730 nβ = 1.700 - 1.760 nγ = 1.720 - 1.770
Maximum Birefringence:δ = 0.050

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:High
Dispersion:relatively strong

Chemical Properties of Iddingsite

Formula:
MgO·Fe
 
2
O
 
3
·3SiO
 
2
·4H
 
2
O
Essential elements:Fe, H, Mg, O, Si
All elements listed in formula:Fe, H, Mg, O, Si

Other Names for Iddingsite

Synonyms:
Oroseite
Other Languages:
German:Iddingsit
Oroseit
Spanish:Iddingsita
Oroseita

Other Information

Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

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    Localities for Iddingsite

    Hide Locality List
    The 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.
    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Antarctica
    AmMin 36:361-367
    AmMin 36:361-367
    Austria
     
    • Burgenland
      • Oberpullendorf
        • Kobersdorf
          • Pauliberg Mt.
    		R. Exel: Die Mineralien und Erzlagerstätten Österreichs (1993)
    • Styria
      • Bad Gleichenberg
        • Kapfenstein
    		R. Exel: Die Mineralien und Erzlagerstätten Österreichs (1993)
    Brazil
     
    • South Region
      • Paraná
        • Foz do Iguaçu
    		Geological Survey Professional Paper 327 (U.S. Department of the Interior, 1959)
    Canada
     
    • Yukon Territory
      • Whitehorse Mining District
        • Carcross
          • Tagish Lake
    		Lunar and Planetary Science XXXII (2001)
    China
     
    • Heilongjiang Province (Manchuria; Dongbei Region)
      • Yichun Prefecture
        • Hongxing District
    		http://wrgis.wr.usgs.gov/open-file/of03-220/DATABASE/lode_deposits.txt
    Czech Republic
     
    • Bohemia (Böhmen; Boehmen)
      • Liberec Region
    		Pauliš, P.: Nejzajímavější mineralogická naleziště Čech. Kutná Hora: Kuttna, 2000, s. 57-58.
    Egypt
     
    • Al Iskandanyah (Alexandria) Governorate
      • Abu Hommos
        • Nakhla
    Finland
     
    • Etelä-Suomen Lääni
      • Southern Karelia
        • Wiborg
    		C. Lemanski, Jr. (re-entry of lost Mindat data).
    France
     
    • Midi-Pyrénées
      • Aveyron
        • Pont-de-Salars
    		G. Trolliard et al. , Bull. Minéral; , 1987, 110, pp. 439-448.
    • Rhône-Alpes
      • Ardèche
        • Plateau des Coirons
          • Alissas
    		Bull. Soc. Franç. Minéralo. Cristallo. , 1974, 97, pp. 450-464.
    Greenland
     
    • Kitaa (West Greenland) Province
      • Arsuk
        • Arsuk Firth
    		Hodson, M.E., and Finch, A.A. (1997): Contributions to Mineralogy and Petrology 127, 46-56.
    Italy
     
    • Campania
      • Naples Province
        • Somma-Vesuvius Complex
          • Monte Somma
            • Pollena - Trocchia area
    		Carati M., 1982. Guida alla mineralogia vesuviana. Guide Calderini, Bologna.
    M. Carati - Guida alla mineralogia vesuviana - Calderini, Bologna, 1982
    • Liguria
      • Genova Province
        • Rossiglione
    		Antofilli, Borgo, Palenzona, 1985. I nostri minerali. Geologia e mineralogia in Liguria. Edizioni Melita, La Spezia.
    Norway
     
    • Finnmark
      • Loppa
        • Øksfjord
    		S. Elvevold and H. Reginiussen, Eur. Journ. Mineral. , 1996, 8, pp. 777-789.
    • Vest-Agder
      • Flekkefjord
    		Barton, M. & Van Bergen, M. J. (1984): Secondary Ilvaite in a dolerite dyke from Rogaland SW Norway. Mineralogical Magazine 48: 449-456
    Papua New Guinea
     
    • West New Britain Province
    		Lowder, G.G. (1970): Contributions to Mineralogy and Petrology 26, 324-340.
    Poland
     
    • Lower Silesia (Dolnośląskie)
      • Strzegom-Sobótka Massif
        • Wrocław District
          • Sobótka (Zobten; Zobten am Berge)
    		Spangenberg, K. (1949): Contributions to Mineralogy and Petrology 1(5/6), 529-535.
      • Ząbkowice District
        • Ząbkowice (Frankenstein)
    		Spangenberg, K., and Müller, M. (1949): Contributions to Mineralogy and Petrology 1(5/6), 560-572.
    • Opolskie
      • Opole
        • Gracze quarry
    		W. Szeliga, Mineralogical Society of Poland, Special Papers, 2003, V 23, pp. 166-168.
    Saint Lucia
     
    • Choc
    		M. Le Guen de Kerneizon et al. , Bull. Minéral. , 1982, 105, pp. 203-211.
    Slovakia
     
    • Banská Bystrica Region
      • Cérová Mts
    		Koděra, M. et al., 1986 a 1990 : Topografická mineralógia Slovenska, diel 1- 3, Veda – Vydavateľstvo SAV, Bratislava, 1990, 1 – 1590
    Sweden
     
    • Småland
      • Jönköping
        • Månsarp
    • Västerbotten
      • Norsjö
    		No reference listed
    UK
     
    • Scotland
      • North West Highlands (Inverness-shire)
        • Isle of Rum
    		Power, M.R., Pirrie, D., Andersen, J.C.O., and Butcher, A.R. (2000): Mineralium Deposita 35, 762-775.
    USA
     
    • Arizona
      • Cochise Co.
        • Tombstone Hills
    		Galbraith, F.W. & D.J. Brennan (1959), Minerals of AZ: 107.
      • Gila Co.
    		Galbraith, F.W. & D.J. Brennan (1959), Minerals of AZ: 90, 95, 107.
      • Pinal Co.
    		Galbraith, F.W. & D.J. Brennan (1959), Minerals of AZ: 107.
    • California
      • Inyo Co.
        • Death Valley
          • Black Mts
            • Furnace Creek District
    		Foshag, William Frederick (1924a), Famous mineral localities: Furnace Creek, Death Valley, California: American Mineralogist: 9: 8-10; Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 277.
      • Kern Co.
        • El Paso Mts
          • Ricardo
    		Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 224.
    Lawson, Andrew Cowper (1893), The geology of Carmelo Bay: University of California, Department of Geologic Science Bulletin: 1: 31; Ross, Clarence Samuel & Earl V. Shannon (1926), The origin, occurrence, composition, and physical properties of the mineral iddingsite: US National Museum Proceedings 2579, vol. 67, Art. 7: 1-19; Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 224.
      • Riverside Co.
        • Rubidoux
          • Mount Rubidoux
    		Banks, Philip O. & Leon T. Silver (1962), Petrological and geochronological observations on the Roubidoux Mountain leucogranites, Riverside County, California (abstract): Geological Society of America Special Paper 68: 5-6; Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 181; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 458.
      • San Bernardino Co.
        • Mojave Desert
    • Colorado
      • Conejos Co.
    		Minerals of Colorado (1997) Eckels, E. B.
    Minerals of Colorado (1997) Eckels, E. B.
    Minerals of Colorado (1997) Eckels, E. B.
      • Rio Grande Co.
    		Minerals of Colorado (1997) Eckels, E. B.
    Minerals of Colorado (1997) E.B. Eckels
    • Indiana
      • Tippecanoe Co.
        • Lafayette
    		www-curator.jsc.nasa.gov/antmet/mmc/Lafay.pdf.
    • Maine
      • Aroostook Co.
    		King & Foord, 1994. Mineralogy of Maine, V.1.
      • Washington Co.
        • Perry
    		Morrill & Hinckley, 1959. Maine Mines & Mineral Localities, Vol. 2.
    • Massachusetts
      • Middlesex Co.
    		Emerson, B.K. Geology of Massachusetts and Rhode Island, 1917. (USGS Bulletin 597), p.206.
    • Michigan
    		www.deq.state.mi.us/documents/deq-glm-rcim-geology-Minerals_Found_In_Michigan.Pdf.
    • Minnesota
      • Lake Co.
        • Beaver Bay
          • Beaver Bay Complex
    		Chusi Li, Ripley, E.M., Oberthür, T., Miller, Jr., J.D., and Joslin, G.D. (2008): Mineralium Deposita 43, 97-110.
        • Ely-Hoyt Lakes Area
    		U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
    • New Mexico
      • Catron Co.
    		Minerals of New Mexico 3rd ed.
      • Colfax Co.
    		Minerals of New Mexico 3rd ed.
    Minerals of New Mexico 3rd ed.
    Northrop, Minerals of New Mexico, 3rd rev. ed., 1996
      • Luna Co.
    		Minerals of New Mexico 3rd ed.
    Minerals of New Mexico 3rd ed.
    Minerals of New Mexico 3rd ed.
      • Otero Co.
    		Minerals of New Mexico 3rd ed.
      • Rio Arriba Co.
    		Minerals of New Mexico 3rd ed.
      • Sandoval Co.
    		Minerals of New Mexico 3rd ed.
      • Santa Fe Co.
    		Minerals of New Mexico 3rd ed.
    Minerals of New Mexico 3rd ed.
    • Oregon
      • Jefferson Co.
    		USGS Bull 969
    • Utah
      • Tooele Co.
        • Oquirrh Mts
    		UGMS Bull 117 Minerals and Mineral Localities of Utah
    • Virginia
      • Amherst Co.
    		Minerals of Virginia, 1990 by R. V. Dietrich
    Minerals of Virginia, 1990 by R. V. Dietrich
      • Campbell Co.
    		Minerals of Virginia, 1990 by R. V. Dietrich
    Minerals of Virginia, 1990 by R. V. Dietrich
    • Wisconsin
      • Forest Co.
        • Little Sand Lake
    		Econ Geol (1987) 82:1204-1238
    Mineral and/or Locality
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    Copyright © Jolyon Ralph and Ida Chau 1993-2009. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them.Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. If you would like to add information to improve the quality of our database, then click here to register. Current server date and time: 4th Nov 2009 20:32:28