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K Feldspar

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About K FeldsparHide

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


Age distributionHide

Recorded ages:
Phanerozoic : 538 Ma to 55.3 ± 3.5 Ma - based on 26 recorded ages.

Synonyms of K FeldsparHide

Other Language Names for K FeldsparHide

Simplified Chinese:钾长石

Varieties of K FeldsparHide

AdulariaA more ordered low-temperature variety of Orthoclase or partially disordered Microcline. Individual localities should be verified because the adularia structural state is nearly equally represented by microcline and orthoclase specimens. Generally found i...
Barian Feldspar
Barium-AdulariaFeldspar group.
ValencianiteA variety of Adularia.
Originally described from Valenciana Mine, Guanajuato, Mun. de Guanajuato, Guanajuato, Mexico.

Common AssociatesHide

Associated Minerals Based on Photo Data:
149 photos of K Feldspar associated with QuartzSiO2
69 photos of K Feldspar associated with Smoky QuartzSiO2
53 photos of K Feldspar associated with AlbiteNa(AlSi3O8)
46 photos of K Feldspar associated with BerylBe3Al2(Si6O18)
44 photos of K Feldspar associated with Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
24 photos of K Feldspar associated with Opal-ANSiO2 · nH2O
17 photos of K Feldspar associated with MuscoviteKAl2(AlSi3O10)(OH)2
15 photos of K Feldspar associated with SchorlNa(Fe2+3)Al6(Si6O18)(BO3)3(OH)3(OH)
15 photos of K Feldspar associated with VesuvianiteCa19Fe3+Al4(Al6Mg2)(☐4)☐[Si2O7]4[(SiO4)10]O(OH)9
10 photos of K Feldspar associated with BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2

Other InformationHide

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 petrologyHide

An essential component of rock names highlighted in red, an accessory component in rock names highlighted in green.

References for K FeldsparHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
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 FeldsparHide

Significant localities for K FeldsparHide

Showing 44 significant localities out of 16,037 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.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for 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 (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Afghanistan
 
  • Badakhshan
    • Khash & Kuran Wa Munjan Districts
      • Koksha Valley (Kokscha Valley; Kokcha Valley)
        • Sar-e Sang (Sar Sang; Sary Sang)
          • Ladjuar Medam (Lajur Madan; Lapis-lazuli Mine; Lapis-lazuli deposit)
[Orthoclase] RWMW Collection
Austria
 
  • Carinthia
    • Völkermarkt District
      • Griffen
        • Saualpe
          • Bad Weißenbach
[Orthoclase] G. Niedermayr, I. Praetzel: Mineralien Kärntens, 1995
  • Lower Austria
    • Zwettl District
      • 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., and Laforêt, C. (1975) Inventaire minéralogique de la France. Ed. BRGM, n°5, Côtes du Nord, 150-153.
Germany
 
  • North Rhine-Westphalia
    • Cologne
      • Rhein-Sieg-Kreis
        • Königswinter
[Sanidine] Nose, K.W. (1808) in Nöggerath, J., Mineralogische Studien über die Gebirge am Niederrhein..., Frankfurt.; Krul, H. (1969) Geologische zwerftochten. N.V. W.J. Thieme & Cie - Zutphen, Netherlands, 161 pp. (in Dutch).
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
 
  • Anosy
    • Betroka
      • Mahasoa Est
[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
    • Dâures
      • 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.
Russia
 
  • Murmansk Oblast
    • Lovozersky District
      • Keivy Mountains
        • Western Keivy Massif
          • Serpovidnyi Ridge
[Microcline var: Amazonite] Lunts, A.Ya. [Лунц, А.Я] (1972) Mineralogy, geochemistry and origin of the rare-earth pegmatites of alkaline granites, north-western USSR [Минералогия, геохимия и генезис редкоземельных пегматитов щелочных гранитов Северо-Запада СССР]. Nedra [Недра], Moscow, 176 pp. (in Russian).
Switzerland
 
  • Grisons
    • Vorderrhein Valley
      • Tujetsch (Tavetsch)
[var: Adularia] Jahn, S. (2004): Klassische Weltfundstelle: Val Giuv. Mineralien Welt 15 (1), 34-61
  • Valais
    • Goms
      • Binn
        • Fäld (Imfeld; Im Feld; Feld)
[Microcline var: Hyalophane] Stalder, H. A., Wagner, A., Graeser, S. and Stuker, P. (1998): "Mineralienlexikon der Schweiz", Wepf (Basel), p. 217-218; American Mineralogist 68, 112 (1983)
USA
 
  • Colorado
    • Park Co.
      • Tarryall
[Microcline var: Amazonite] Jordi Fabre
    • Teller Co.
      • Crystal Peak
[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.; Joseph Dorris (2016) Amazonite and Smoky Quartz Pegmatites of the Smoky Hawk Trend, Teller County, Colorado. in Second Eugene E. Foord Pegmatite Symposium July 15-19, 2016 Colorado School of Mines campus, Golden, Colorado
  • Connecticut
    • Fairfield County
      • Bethel
[var: Adularia] Harold Moritz collection
    • 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.
      • East Hampton (Chatham)
        • Airline Railroad
[Microcline] Schooner, Richard. (1958), The Mineralogy of the Portland-East Hampton-Middletown-Haddam Area in Connecticut (With a few notes on Glastonbury and Marlborough). Published by Richard Schooner; Ralph Lieser of Pappy’s Beryl Shop, East Hampton; and Howard Pate of Fluorescent House, Branford, Connecticut.; Schooner, Richard. (circa 1980s), Untitled manuscript on central Connecticut mineralogy.
      • 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
[Microcline var: Hyalophane] Schooner, Richard. (circa 1980s), Untitled manuscript on central Connecticut minerals.
  • Idaho
    • Boise Co.
[Microcline] Ted Johnson Collection
  • Maine
    • Oxford County
      • 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 Mining District (Flathead Mining 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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