Distribution of Extraframework Cations and Water Molecules
in the Structure of Synthetic Paulingite

A. E. Lapshin*, O. V. Magdysyuk, O. Yu. Golubeva, and E. A. Nikolaeva

Grebenshchikov Institute of Silicate Chemistry, Russian Academy of Sciences,
nab. Admirala Makarova 2, St. Petersburg, 199034 Russia

*e-mail: lapshin@isc.nw.ru

Received March 9, 2010

Abstract—The distribution of extraframework cations and water molecules in cavities of synthetic paulingite
(Si/Al = 3.85) has been determined from X-ray powder diffraction data. An analysis performed has demon-
strated that K and Na cations are located in four out of the seven types of cavities contained in paulingite:
oto,phi, plg, and pau. It has been established that the synthetic paulingite has the composition
H_26.8Na_42.4K_69.2Al_138.4Si_533.6O₁₃₄₄ 283H₂O.

Keywords: zeolite, paulingite, Rietveld method, and maximum entropy method

DOI: 10.1134/S108765961101007X

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