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K Feldspar

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Potassium-dominant feldspars with unknown crystal symmetry and Al-Si ordering state.


Classification of K Feldspar

Other Names for K Feldspar

Name in Other Languages:
Simplified Chinese:钾长石

Other Information

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

K Feldspar in petrology

An essential component of (items highlighted in red)
Common component of (items highlighted in red)

References for K Feldspar

Reference List:
Gay, P. & N.N. Roy (1965), The mineralogy of the potassium-barium feldspar series: III. Subsolid relationships: Min. Magazine: 36: 914-932.

Dickson, F.W. (1968), Growth of K-feldspars and plagioclase by replacement processes in rock of the Papoose Flat pluton and in country rocks, Inyo Mountains, California: Geol. Soc. Amer. Spec. Papers 101, Abstract for 1966: 53-54.

Foland, K.A. (1974) 40Ar diffusion in homogeneous orthoclase and an interpretation of Ar diffusion in K-feldspar. Geochimica et Cosmochimica Acta: 38: 151-166.

MacKenzie, W.S. and J. Zussman, Eds., The Feldspars (1974). Manchester University Press, U.K.

Willaime, C., Christie, J.M., and Kovacs, M.-P. (1979) Experimental deformation of K-feldspar single crystals. Bulletin de Mineralogie: 102: 167-177.

Eggleton, R.A. and Buseck, P.R. (1980) The orthoclase-microcline inversion: A high-resolution transmission electron microscope study and strain analysis. Contributions to Mineralogy and Petrology: 74: 123-133.

Kovacs, M.P. and Gandais, M. (1980) Transmission electron microscope study of experimentally deformed K-feldspar single crystals. Physics and Chemistry of Minerals: 6: 61-76.

Brown, W.L. and Parsons, I. (1984) The nature of potassium feldspar, exsolution microtextures and development of dislocations as a function of composition in perthitic alkali feldspars. Contributions to Mineralogy and Petrology: 86: 335-341.

McLaren, A.C. and Fitz Gerald, J.D. (1987) CED and ALCHEMI investigation of local symmetry and Al, Si ordering in K-feldspars. Physics and Chemistry of Minerals: 14: 281-292.

Goldsmith, J. (1988) Enhanced Al/Si diffusion in KAlSi3O8 at high pressures: the effect of hydrogen. Journal of Geology: 96: 109-124.

Martin, R.F. (1988) The K-feldspar mineralogy of granites and rhyolites: a generalized case of pseudomorphism of the magmatic phase. Rendi. Soc. Ital. Mineral. Petrol.: 43: 343-354.

Smith J.V. and Brown, W.L. (1988), Feldspar Minerals. Crystal structures, physical, chemical, and microstructural properties, vol. 1. Springer-Verlag. New York.

Zheng, Y., Gandais, M., and Heggie, M. (1988) Study of (010)[101] and (001)[110]/2 dislocations in K-feldspars by HRTEM and modelling. Physics and Chemistry of Minerals: 15: 349-354.

Harris, M.J., Salje, E.K.H., Güttler, B.K., and Carpenter, M.A. (1989) Structural states of natural potassium feldspar. Physics and Chemistry of Minerals: 16: 649-658.

Worden, R.H. and Rushton, J.C. (1992) Diagenetic K-feldspar textures: a TEM study and model for diagenetic feldspar growth. Journal of Sedimentary Petrology: 62: 779-789.

FitzGerald, J.D. and Harrison, T.M. (1993) Argon diffusion domains in K-feldspar I: microstructures in MH-10. Contributions to Mineralogy and Petrology: 113: 367-380.

Carpenter, M.A. and Salje, E.K.H. (1994), Thermodynamics of nonconvergent cation ordering in minerals: III. Order parameter coupling in potassium feldspar. American Mineralogist: 79: 1084-1098.

Kronenberg, A.K., Yund, R.A., and Rossman, G.R. (1996) Stationary and mobile hydrogen defects in potassium feldspar. Geochimica et Cosmochimica Acta: 60: 4075-4094.

Doremus, R.H. (1998) Comment on "Stationary and mobile hydrogen defects in potassium feldspar" by A.K. Kronenberg, R.A. Yund, and G.R. Rossman. Geochimica et Cosmochimica Acta: 62: 377-378.

Kronenberg, A.K., Yund, R.A., and Rossman, G.R. (1998) Reply to the comment by Robert H. Doremus on "Stationary and mobile hydrogen defects in potassium feldspar". Geochimica et Cosmochimica Acta: 62: 379-382.

Nyfeler, D., Armbruster, T., and Villa, I.M. (1998) Si, Al, Fe order-disorder in Fe-bearing K-feldspar from Madagascar and its implications to Ar diffusion. Schweizerische mineralogische und petrographische Mitteilungen: 78: 11-21.

Wartho, J.-A., Kelley, S.P., Brooker, R.A., Carroll, M.R., Villa, I.M., and Lee, M.R. (1999) Direct measurement of Ar diffusion profiles in a gem-quality Madagascar K-feldspar using the ultra-violet laser ablation microprobe (UVLAMP). Earth and Planetary Science Letters: 170: 141-153.

Fitz Gerald, J.D., Parsons, I., and Cayzer, N. (2006) nanotunnels and pull-aparts: defects of exsolution lamellae in alkali feldspars. American Mineralogist: 91.

Internet Links for K Feldspar

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Specimens:
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Significant localities for K Feldspar

Showing 40 significant localities out of 14,089 recorded on mindat.org.

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.
(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? 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.
Afghanistan
 
  • Badakhshan Province (Badakshan Province; Badahsan Province)
    • Khash & Kuran Wa Munjan Districts
      • Koksha Valley (Kokscha Valley; Kokcha Valley)
[Orthoclase] RWMW Collection
Austria
 
  • Carinthia
    • Saualpe
      • Bad Weißenbach
[Orthoclase] G. Niedermayr, I. Praetzel: Mineralien Kärntens, 1995
  • Lower Austria
    • Waldviertel
      • Waldhausen
[Microcline] R. Exel: Die Mineralien und Erzlagerstätten Österreichs (1993)
Canada
 
  • British Columbia
    • Osoyoos Mining Division
      • Penticton
[Sanidine] Dave Joyce personal collection
  • Québec
    • Abitibi-Témiscamingue
      • La Vallée-de-l'Or RCM
        • Réservoir-Dozois
[Orthoclase] Age of the Cabonga nepheline syenite, Grenville Province, western Quebec Hudon, Pierre; Friedman, Richard M.; Gauthier, Gilles; Martignole, Jacques Canadian Journal of Earth Sciences, vol. 43, issue 9, pp. 1237-1249 Olivier Langelier Collection; Hudon, P., Friedman, R.M., Gauthier, G. & Martignole, J. (2006) Age of the Cabonga nepheline syenite, Grenville Province, western Quebec. Canadian Journal of Earth Sciences, vol. 43(9), 1237-1249.
Ethiopia
 
  • Southern Nations Nationalities and Peoples' Region
[Microcline var: Amazonite] Kaiser, H. (2006): Amazonit aus Äthiopien-Kristalle injutesäcken. ExtraLapis 30: 72-73
France
 
  • Auvergne-Rhône-Alpes
    • Loire
      • Montbrison
        • Essertines-en-Châtelneuf
[Microcline] F. Gonnard (1906) - Minéralogie des départements du Rhône et de la Loire, pp: 6 & 36
    • Rhône
      • Beaujeu
        • Les Ardillats
[Orthoclase] Favreau G., Legris J-R., Dardillac M. (1996), La Verrière (Rhône): Histoire et Minéralogie, Le Cahier des Micromonteurs, n°3, pp:3-28
  • Brittany
    • Côtes-d'Armor
      • Saint-Jacut-de-la-Mer
[Microcline] Pierrot R., Chauris L., Laforêt C. (1975), Inventaire minéralogique de la France, Ed. BRGM, n°5, Côtes du Nord, pp: 150-153
Germany
 
  • North Rhine-Westphalia
    • Siebengebirge
      • Königswinter
[Sanidine] Nose, K.W., (1808): in Nöggerath, J., Mineralogische Studien über die Gebirge am Niederrhein..., Frankfurt
Italy
 
  • Tuscany
    • Livorno Province
      • Elba Island
        • Campo nell'Elba
          • San Piero in Campo
[Orthoclase] Barsotti, G., & Nannoni, R. (2006). Rocce, minerali e miniere delle isole dell'Arcipelago Toscano. Pacini editore, 152 pp.
[Orthoclase] Barsotti, G., & Nannoni, R. (2006). Rocce, minerali e miniere delle isole dell'Arcipelago Toscano. Pacini editore, 152 pp.
          • Sant'Ilario in Campo
[Orthoclase]
Madagascar
 
  • Tuléar Province (Toliara)
    • Anosy Region (Fort Dauphin Region)
      • Betroka District
        • Mahasoa East Commune
[Sanidine] Ackermann, S., Kunz, M., Armruster, T., Schefer, J. & Hanni, H. (2005): Cation distribution in a Fe-bearing K-feldspar from Itrongay, Madagascar. A combined neutron- and x -ray single crystal diffraction study. Lawrence Berkeley National Labroatory- http://www.escholarship.org/uc/item/20f968sx http://www.mindat.org/mesg-7-219075.html
Namibia
 
  • Erongo Region
    • Brandberg Area
      • Messum Igneous Complex
[Microcline] Peter Seroka collection. Bezing, L. von, Bode, R. & Jahn, S. (2008): Namibia Minerals and Localities. Edition Schloss Freudenstein, Bode Verlag GmbH, Haltern: 270 (in English)
Norway
 
  • Aust-Agder
[Microcline] Breithaupt, A. (1830): Ueber die Felsite und einige neue Specien ihres Geschlechts. Journal für Chemie und Physik, 60: 316-330
  • Vestfold
    • Larvik
[Microcline] Breithaupt, A. (1830): Ueber die Felsite und einige neue Specien ihres Geschlechts. Journal für Chemie und Physik, 60: 316-330; Larsen, K. E. (2015): Mikroklin- et mineral førstegangsbeskrevet fra Norge. Stein 42 (4), 9-11.
Switzerland
 
  • Grischun (Grisons; Graubünden)
    • Vorderrhein Valley
      • Tujetsch (Tavetsch)
[var: Adularia] Jahn, S. (2004): Klassische Weltfundstelle: Val Giuv. Mineralien Welt 15 (1), 34-61
USA
 
  • Colorado
    • Park Co.
      • Tarryall
[Microcline var: Amazonite] Jordi Fabre
    • Teller Co.
      • Crystal Peak area
[Microcline var: Amazonite] Specimen from Joe Dorris collection exhibited at Tucson show 2008; Joseph Dorris (2015) Amazomite and Smoky Quartz Mining on the Smoky Hawk Claim, Teller County, Colorado. 36th Annual New Mexico Mineral Symposium pp. 11-12.
  • Connecticut
    • Hartford Co.
      • New Britain
[var: Adularia] Miller, F. W. (circa 1986), Hydrothermal Quartz and Barite Veins in the Basalt of New Britain, Connecticut. Harvard University Mineralogical Museum Association.
    • Litchfield Co.
      • Morris
[Microcline] W.C. van Laer: field notes, 1977; Yale Peabody Museum collection
      • Thomaston
[Microcline] Januzzi, Ronald E. and David Seaman. (1976), Mineral Localities of Connecticut and Southeastern New York State and Pegmatite Minerals of the World. The Mineralogical Press, Danbury, Connecticut.
    • Middlesex Co.
      • Haddam
[Microcline] Williams, Horace S. (circa 1945): Article for New York Society of Mineralogists. Brainerd Public Library, Haddam, Connecticut.; Ryerson, Kathleen. (1972): Rock Hound's Guide to Connecticut. Pequot Press.; Webster, Bud. (1978): Mineral Collector’s Field Guide Connecticut.
        • Haddam Neck
[Microcline] Davis, James W. (1901): The Minerals of Haddam, Conn. Mineral Collector, v. 8, no. 4, pp. 50-54, and no. 5, pp. 65-70.; Mineralogical Magazine 1902 13 : 97-121.; Cameron, Eugene N. and others. (1954) PEGMATITE INVESTIGATIONS 1942-45 NEW ENGLAND. U.S. Geological Survey, Professional Paper 255; Scovil, Jeffrey A. (1992): Famous Mineral Localities: the Gillette Quarry, Haddam Neck, Connecticut. (Mineralogical Record, 23(1):19-28.); Stugard, Frederick, Jr. (1958) PEGMATITES OF THE MIDDLETOWN AREA, CONNECTICUT. USGS Bulletin 1042-Q.
[Microcline] Harold Moritz collection
[Microcline var: Amazonite] Weber, Marcelle H. and Earle C. Sullivan. (1995): Connecticut Mineral Locality Index. Rocks & Minerals (Connecticut Issue): 70(6): 403
  • Idaho
    • Boise Co.
[Microcline] Ted Johnson Collection
  • Maine
    • Oxford Co.
      • Albany
[Microcline] Barry Heath and Frank Perham; King, V. (ed.), 2009, Maine feldspar, Families, and Feuds.
  • Massachusetts
    • Essex Co.
      • Gloucester
[Microcline] P Cristofono collection , 2009
  • Montana
    • Flathead Co.
      • Hog Heaven District (Flathead District)
        • Kofford Ridge
[Sanidine] Ray Lasmanis
  • New Jersey
    • Sussex Co.
      • Franklin Mining District
        • Franklin
          • Franklin Mine
[Microcline] Peters, et al: The Minerals of the Buckwheat Dolomite, Franklin, NJ: Mineralogical Record:14:183-194; Dunn(1995):Pt4:510.
[Microcline] Palache(1935):16 & 60; Dunn(1995):Pt1:133.
  • Pennsylvania
    • Delaware Co.
      • Middletown Township
[Microcline] Gordon, Mineralogy of Pennsylvania, 1922 p. 190
  • Texas
    • Llano Co.
      • Kingsland Granite Company Quarry (Petrick Quarry)
[Microcline] Self-collected by Franklin Roberts.; Arthur Smith, Frank Roberts, Denise Bicknell (2008) Mineral News, 24, #1, 6-7.
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