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The determination of the orthoclase content of homogenized alkali feldspars using the 2̄01 X-ray method

Published online by Cambridge University Press:  05 July 2018

J. B. Jones ,
R. W. Nesbitt  and
P. G. Slade
J. B. Jones
Affiliation:
Department of Geology, The University of Adelaide, Adelaide, South Australia, 5001
R. W. Nesbitt
Affiliation:
Department of Geology, The University of Adelaide, Adelaide, South Australia, 5001
P. G. Slade
Affiliation:
Department of Geology, The University of Adelaide, Adelaide, South Australia, 5001
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Summary

Forty-three natural alkali feldspars have been homogenized and used to correlate with wt % K2O. The regression of Or on is Or (wt %) = 465·5 (Å)-1877·5, and is comparable to that obtained on an exchanged orthoclase (Wright, 1968). A deviation from the Orville (1963, 1967) determinative line for synthetic sanidine-albite is greatest at the high potassium end of the series. The discrepancy is not caused by failure to homogenize or incomplete disorder. The presence of cations other than potassium and sodium, or cation deficiency, or both cannot be discounted as a cause.

Type
Research Article
Information
Mineralogical Magazine , Volume 37 , Issue 288 , December 1969 , pp. 489 - 496
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1969

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Footnotes

1

Present address: C.S.I.R.O. Division of Soils, Adelaide.

References

Bowen, (N. L.) and Tuttle, (O. F.), 1950. Journ. Geol. 58, 489 .CrossRefGoogle Scholar
Bowen, (N. L.) and Tuttle, (O. F.), 1958. Mere. Geol. Soc. Amer. 74.Google Scholar
Brown, (W. L.), 1967. Min. Mag. 36, 80.Google Scholar
Carman, (J. A.) and Tuttle, (O. F.), 1967. Progr. Abstr. Annual Meeting Geol. Soc. Amer. 33.Google Scholar
Carmichael, (I. S. E.) and MacKenzie, (W. S.), 1964. Min. Mag. 33, 949.Google Scholar
Cole, (W. F.), Sörum, (H.), and Kennard, (O.), 1949. Acta Cryst. 2, 280.CrossRefGoogle Scholar
Coombs, (D. S.), 1954. Min. Mag. 30, 409.Google Scholar
Deer, (W. A.), Howie, (R. A.), and Zussman, (J.), 1963. Rock-forming Minerals, 4. London: (Longmans).Google Scholar
Emeleus, (C. H.) and Smith, (J. V.), 1959. Amer. Min. 44, 1187 [M.A. 15-140].Google Scholar
Evans, (H. T.) Jr., Appleman, (D. E.), and Handwerker, (D. S.), 1963. Amer. Cryst. Assoc., Cambridge, Mass., Ann. Meeting, Program, 42.Google Scholar
Fleischer, (M.), 1969. Geochimica Acta, 33, 65.CrossRefGoogle Scholar
Fleischer, (M.) and Stevens, (R. E.), 1962. Geochimica Acta, 26, 525 [M.A. 16-359].CrossRefGoogle Scholar
Heier, (K. A.), 1962. Norsk. Geol. Tidsskr. 42, 415.Google Scholar
Ingamells, (C. O.) and Suhr, (N. H.), 1963. Geochimica Acta, 27, 897 [M.A. 16-411].CrossRefGoogle Scholar
Jones, (J. B.), 1966. Nature, 210, 1352.CrossRefGoogle Scholar
Kempe, (D. R. C.), 1966. Min. Mag. 35, 704.Google Scholar
Loth, (W. C.) and Turtle, (O. F.), 1966. Amer. Min. 51, 1359.Google Scholar
MacKenzie, (W. S.), 1954. Min. Mag. 30, 354.Google Scholar
Orville, (P. M.), 1960, Bull. Geol, Soc, Amer. 71, 1939.CrossRefGoogle Scholar
Orville, (P. M.), 1963. Amer. dourn, Sci. 261, 201.Google Scholar
Orville, (P. M.), 1967. Amer. Min. 52, 55.Google Scholar
Parsons, (I.), 1965. Journ. Petrology, 6, 365,CrossRefGoogle Scholar
Parsons, (I.), 1968. Min. Nag. 36, 797.Google Scholar
Shaw, (H. R.), 1963. Amer. Min. 48, 883,Google Scholar
Smith, (J. V.), 1961. Ibid. 46, 1489.Google Scholar
Taylor, (W. H.), 1965. The Feldspars in Crystal Structure of Minerals, Bragg and Claringbull. London : (Bell and Sons).Google Scholar
Thompson, (R. N.) and MacKenzie, (W. S.), 1967. Amer. Journ. Sci. 265, 714.CrossRefGoogle Scholar
Wilkinson, (J. F. G.), 1962. Journ. Petrology, 3, 192 [M.A. 16-576].CrossRefGoogle Scholar
Wones, (D. R.) and Appleman, (D. E.), 1963. Ibid. 4, 131.CrossRefGoogle Scholar
Wright, (T. L.), 1964. Amer. Min. 49, 715.Google Scholar
Wright, (T. L.), 1968. Ibid. 53, 88.CrossRefGoogle Scholar
Wright, (T. L.) and Stewart, (D. B.), 1968. Ibid. 53, 38.Google Scholar