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K Feldspar

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Synonym of:Microcline, Orthoclase, Sanidine


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

Classification of K Feldspar

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Other Names for K Feldspar

Synonyms:
Potassic FeldsparPotassium Feldspar
Other Languages:
German:Kalifeldspat
Simplified Chinese:钾长石
Swedish:Kalifältspat
Varieties:
AdulariaBarium-AdulariaValencianite

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.

References for K Feldspar

Reference List:

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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 potasssium 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 magamatic 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.

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    Localities for K Feldspar

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