Na-5(Ga4S)(GaS4)(3)center dot 6H(2)O: A three-dimensional thiogallate containing a novel octahedral building block

作者：Rumble Jack; Vaqueiro Paz^*

来源：Solid State Sciences, 2011, 13(5): 1137-1142.

DOI：10.1016/j.solidstatesciences.2011.01.003

• Gallium sulphide
• Solvothermal synthesis
• Crystal structure determination

The new thiogallate Na-5(Ga4S)(GaS4)(3)center dot 6H(2)O has been prepared solvothermally, using 3,5-dimethyl pyridine as a solvent, and characterised by powder and single crystal X-ray diffraction. This material, which exhibits a three-dimensional crystal structure, crystallises in the cubic space group F (4) over bar 3c (a = 17.557(4) angstrom). The crystal structure contains octahedral building blocks [Ga4S (GaS4)(6)](20-), linked into a three-dimensional network with a perovskite-type topology, and sodium hydrate clusters, [Na-5(H2O)(6)](5+), filling the cavities in the [Ga4S(GaS4)(6/2)](5-) framework. UV-Vis diffuse reflectance measurements indicate that this material is a wide band gap semiconductor, with a band gap of ca. 4.4 eV.

• 出版日期2011-5