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2005
Structure
D 2000
28- 003
Structure
New Quaternary Barium Copper/Silver Selenostannates: Different Coordination
Spheres, Metal—Metal Interactions, and Physical Properties. — The new compounds BaAg2SnSe4 (I), BaCu2SnSe4 (II), and Ba3Cu2Sn3Se10 are synthesized from the
elements in stoichiometric ratios (800 °C, 6 h). As revealed by single crystal XRD compound (I) crystallizes in the space group I222 (BaAg2SnS4-type structure) with Z = 2,
compound (II) in the space group Ama2 (SrCu2GeSe4-type structure) with Z = 4, and
compound (III) in a new structure type in the space group P21/n with Z = 4. All three
structures contain SnSe4 tetrahedra and pairs of M atoms (M: Cu, Ag). All three compounds are black semiconductors. — (ASSOUD, A.; SOHEILNIA, N.; KLEINKE*,
H.; Chem. Mater. 17 (2005) 9, 2255-2261; Dep. Chem., Univ. Waterloo, Waterloo,
Ont. N2L 3G1, Can.; Eng.) — W. Pewestorf
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