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A new X-ray investigation of maximum microcline crystalline solutions

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Abstract

Refined unit-cell dimensions and molar volumes of a mircocline-low albite ion-exchange series previously studied by Waldbaum and Robie (1971) have been redetermined. Members in the sodic half of the series were found to have significantly larger b dimensions than those previously reported, resolving the major difference between the above study and that of Orville (1967).

W v, the Margules parameter related to the volume of mixing, is significantly lower (0.078 cal/bar mol) than those determined in either of the investigations above. However, it is close to values of W v determined for several alkali feldspar series with topochemically monoclinic Al-Si distributions. Thus, the dependence of K-Na volume of mixing properties on Al-Si distribution in alkali feldspars is doubtful.

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References

  • Borg, I.Y., Smith, D.K.: Calculated X-ray powder patterns for silicate minerals. Geol. Soc. Am. Mem. 122, 896 p. (1969)

    Google Scholar 

  • Burnham, C.W.: Lattice constant refinement. Geo phys. Lab. Carnegie Inst. Washington Year Book 61, 132–135 (1962)

    Google Scholar 

  • Hovis, G.L.: Unit-cell dimensions and molar volumes for a sanidine-analbite ion-exchange series. Am. Mineral. 62, 672–679 (1977)

    Google Scholar 

  • Hovis, G.L., Waldbaum, D.R., Thompson, J.B., Jr.: Molar enthalpy and volume of K-Na mixing for an alkali feldspar ionexchange series based on monoclinic adularia (abst.). Geol. Soc. Am. Ann. Mtg. Abstracts with Programs (Denver) 927–928 (1976)

  • Orville, P.M.: Unit-cell parameters of the microcline-low albite and sanidine-high albite solid solution series. Am. Mineral. 52, 55–86 (1967)

    Google Scholar 

  • Parrish, W.: Results of the I.U.Cr. precision lattice project. Acta Cryst. 13, 838–850 (1960)

    Article  Google Scholar 

  • Thompson, J.B., Jr.: Thermodynamic properties of simple solutions. In: Researches in Geochemistry (P.H. Abelson, ed.), Vol. 2, pp. 340–361. New York: John Wiley and Sons, Inc. 1967

    Google Scholar 

  • Waldbaum, D.R.: Calorimetric Investigation of the Alkali Feldspars. Ph. D. dissertation, Cambridge, Massachusetts: Harvard University 1966

    Google Scholar 

  • Waldbaum, D.R., Robie, R.A.: Calorimetric investigation of Na-K mixing and polymorphism in the alkali feldspars. Z. Krist. 134, 381–420 (1971)

    Google Scholar 

  • Worthing, A.G., Geffner, J.: Treatment of Experimental Data. 342 p. New York: John Wiley and Sons, Inc. 1943

    Google Scholar 

  • Wright, T.L., Stewart, D.B.: X-ray and optical study of alkali feldspar. I. Determination of composition and structural state from refined unit cell parameters and 2V. Am. Mineral. 53, 38–87 (1968)

    Google Scholar 

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Authors and Affiliations

  1. Department of Geology, Lafayette College, 18042, Easton, PA, USA

    Guy L. Hovis & Eric Peckins

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  1. Guy L. Hovis
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  2. Eric Peckins
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Hovis, G.L., Peckins, E. A new X-ray investigation of maximum microcline crystalline solutions. Contr. Mineral. and Petrol. 66, 345–349 (1978). https://doi.org/10.1007/BF00403418

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  • DOI: https://doi.org/10.1007/BF00403418

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