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Numerical dependence of the unit-cell parameters of minerals of the lamprophyllite group on the cationic composition in the interlayer position

  • Structure of Inorganic Compounds
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Abstract

Analysis of the data on the unit-cell parameters of the chemically characterized minerals of the lamprophyllite group showed that the parameter c and the angle β are independent of the cationic composition in the interlayer position. The value of the parameter b correlates with the Ba content. It is shown that the parameter a linearly depends on the average ionic radius of cations in the interlayer position. The Ba and K contents can be estimated from the equations K + Ba = 2.1431a-41.091 and Ba = 17.764b-125.36.

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  1. Vernadsky Institute of Geochemistry and Analytical Chemistry, Russian Academy of Sciences, ul. Kosygina 19, Moscow, 119991, Russia

    V. A. Zaitsev

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  1. V. A. Zaitsev
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__________

Translated from Kristallografiya, Vol. 50, No. 3, 2005, pp. 423–425.

Original Russian Text Copyright © 2005 by Za\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l}\)tsev.

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Zaitsev, V.A. Numerical dependence of the unit-cell parameters of minerals of the lamprophyllite group on the cationic composition in the interlayer position. Crystallogr. Rep. 50, 379–381 (2005). https://doi.org/10.1134/1.1927593

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  • DOI: https://doi.org/10.1134/1.1927593

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