Abstract
Taylor (1933) envisaged the topology of the aluminosilicate framework of sanidine on Christmas Day, 1932, by an elegant division of the unit cell into boxes by use of pseudotetragonal axes [100], [010] and [102]. Four tetrahedra in each box would link together in only one way for space group C2/m. Each K atom was placed on a mirror plane at reasonable bond distances to the oxygen atoms, and the atomic coordinates were adjusted by trial-and-error to obtain agreement between observed and calculated X-ray diffraction intensities. Table 2.1 lists the prototype positions for a sanidinized orthoclase. A comprehensive survey of the structural variants of feldspar (Taylor et al 1934) is the basis of the following description.
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© 1988 Springer-Verlag Berlin Heidelberg
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Smith, J.V., Brown, W.L. (1988). Crystal Structure of Feldspar. Principal Features. Related Structures. In: Feldspar Minerals. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-72594-4_2
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DOI: https://doi.org/10.1007/978-3-642-72594-4_2
Publisher Name: Springer, Berlin, Heidelberg
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