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Clays and Clay Minerals; June 2001; v. 49; no. 3; p. 197-203
© 2001 Clay Minerals Society
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UNUSUAL X-RAY CHARACTERISTICS OF VERMICULITE FROM WIRY, LOWER SILESIA, POLAND

Boris A. Sakharov1, Elzbieta Dubinska2, Pawel Bylina3 and Grzegorz Kapron2

1 Geological Institute, Russian Academy of Sciences, Pyzhevsky Street 7, 109017 Moscow, Russia
2 Institute of Geochemistry, Mineralogy and Petrology, Faculty of Geology, Warsaw University, al. Zwirki i Wigury 93, 02–089 Warsaw, Poland
3 Institute of Geological Sciences, Polish Academy of Sciences, ul. Twarda 51/55, 00–818 Warsaw, Poland

E-mail of corresponding author: dubinska{at}geo.uw.edu.pl

Coarse-grained vermiculite from a serpentinite-pegmatite thermal zone displays a rational series of narrow 14.4 Å basal reflections and an unusual broad 28 Å peak. X-ray diffraction simulations and fitting techniques show that the 28 Å peak is related to 28 Å domains consisting of elongated 2:1 layers of different lengths. The domains are located at the crystal edges of the vermiculite.

Key Words: Crystal Edge • Interstratified Mineral • Vermiculite • XRD Characteristics




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B. A. Sakharov, B. A. Sakharov, E. Dubinska, P. Bylina, J. A. Kozubowski, G. Kapron, and M. Frontczak-Baniewicz
SERPENTINE-SMECTITE INTERSTRATIFIED MINERALS FROM LOWER SILESIA (SW POLAND)
Clays and Clay Minerals, February 1, 2004; 52(1): 55 - 65.
[Abstract] [Full Text] [PDF]


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