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Hydrothermal Synthesis and Crystal Structures of [(CH3NH3)0.5(NH4)1.5]Sb8S13·2.8H2O and Rb2Sb8S13 ·3.3H2O

2000; Elsevier BV; Volume: 155; Issue: 2 Linguagem: Inglês

10.1006/jssc.2000.8942

1095-726X

Xiqu Wang, Lumei Liu, Allan J. Jacobson,

Glass properties and applications

The new thioantimonates [CH3NH3)0.5(NH4)1.5Sb8S13 ·2.8H2O (1) and Rb2Sb8S13 ·3.3H2O (2) have been hydrothermally synthesized and characterized by single-crystal structure determination. The two compounds are isostructural and crystallize in the monoclinic system, space group P21/m with a=7.1931(3) Å, b=25.770(1) Å, c=15.9999(8) Å, β=96.856(1)°, Z=4 for 1 and a=7.1899(8) Å, b=25.760(3) Å, c=15.973(2) Å, β=96.541(2)°, Z=4 for 2, measured at 293 K. The structure consists of 12-membred rings of SbS3 pyramids that are linked into one-dimensional complex chains. The chains are interconnected by secondary Sb–S bonds to form puckered layers. The stacking of the layers aligns the 12-membred rings, giving rise to a system of wide channels with an aperture of ca. 5.9×8.0 Å. The monovalent cations and water molecules are located in the channels. The layers are closely related to those found in the known compounds (C4H10N)2Sb8S13 ·0.15H2O and (C8N4H26)0.5 Sb7S11.