of Cs4[(UO2)2(C2O4)(SO4)2(NCS)2]
4H2Oand (NH4)4[(UO2)2(C2O4)(SO4)2(NCS)2]
6H2O
I. V. Medrisha, A. V. Virovetsb, E. V. Peresypkinab, and L. B. Serezhkinaa
a Samara State University, ul. Akademika Pavlova 1, Samara, 443011 Russia
b Nikolaev Institute of Inorganic Chemistry, Siberian Branch, Russian Academy of Sciences,
pr. Akademika Lavrent’eva 3, Novosibirsk, 630090 Russia
Received May 4, 2007
Abstract—Single crystals of Cs4[(UO2)2(C2O4)(SO4)2(NCS)2] · 4H2O (I) and (NH4)4[(UO2)2(C2O4)(SO4)2(NCS)2] ·
6H2O (II) have been synthesized and studied by X-ray diffraction. The crystals of both compounds are ortho-
rhombic with the space group Pbam, Z = 2, and unit cell parameters a = 12.0177(3) Å, b = 18.6182(5) Å, c =
6.7573(10) Å, R = 0.0376 (I); a = 11.6539(9) Å, b = 18.3791(13) Å, c = 6.7216(5) Å, R = 0.0179 (II). The main
structural units of crystals I and II are [(UO2)2(C2O4)(SO4)2(NCS)2]4
chains belonging to the crystal-chemical
group A2K02
(A = 
K02 = 
B2 = 
M1 = NCS
) of the uranyl complexes. The ura-
nium-containing chains are joined into a three-dimensional framework due to a system of electrostatic interac-
tions with the cesium or ammonium ions in the structure of I. In the structure of II, this framework is addition-
ally stabilized by hydrogen bonds involving the outer-sphere water molecules and ammonium ions.
DOI: 10.1134/S0036023608070103
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