12210-70-7Relevant articles and documents
A novel two-dimensional mercury antimony telluride: Low temperature synthesis and characterization of RbHgSbTe3
Li, Jing,Chen, Zhen,Wang, Xunxie,Proserpio, Davide M.
, p. 28 - 33 (1997)
RbHgSbTe3 (I), a novel two-dimensional quaternary mercury antimony telluride, was synthesized via an unconventional low-temperature route. Single crystals of I were grown at 180°C from solvothermal reactions using ethylenediamine as solvent. The crystal structure of I was determined by X-ray diffraction methods. The structure belongs to the orthorhombic crystal system, space group Cmcm (no. 63), a = 4.590 (2) A, b = 15.745 (4) A, c = 11.737 (2) A, Z = 4. The crystal structure of this compound consists of two-dimensional layers of ∞2[HgSbTe3- ] with Rb+ counterions located between the layers. Optical studies performed on the powder samples of I suggested that the compound is a narrow-gap semiconductor. A band-gap of 0.2 e V was estimated from its diffuse reflectance spectrum.
The synthesis and crystal structure of K2UTe3
Sto?we, Klaus,Appel-Colbus, Stephan
, p. 1647 - 1651 (2008/10/08)
Syntheses of K2UTe3 were performed via polytelluride fluxes from K2Te3 and metallic uranium in the molar ratio 2:1 at 600 to 800 °C. Well-formed crystals were isolated by washing the reguli with liquid ammonia. One-phase powder samples of K2UTe3 are also available by reactions of stoichiometric mixtures of K2Te3 and uranium. K2Te3 was prepared in liquid ammonia from the elements using a glass apparatus specially designed for the synthesis of alkali metal chalcogenides. By x-ray structure analyses of single crystals we found K2UTe3 to crystallize monoclinic (space group C2/m, Z = 4) with the lattice parameters a = 800.41(3) pm, b = 1387.67(5) pm, c = 851.63(4) pm and β = 108.495(3)°. The crystal structure of the compound may be regarded as a stuffed AlCl3-type structure. The existence of an analogous compound Rb2UTe3 crystallizing isotypically to K2UTe3 has been shown by x-ray powder investigations.