MgCuAl2-type Intermetallics REPdCd2(RE = Ce, Pr, Nd, Sm)
نویسنده
چکیده
The cadmium-rich intermetallic compounds REPdCd2 (RE = Ce, Pr, Nd, Sm) were obtained by high-frequency melting of the elements in sealed niobium ampoules and subsequent annealing in muffle furnaces. The REPdCd2 phases crystallize with the orthorhombic MgCuAl2-type structure, space group Cmcm. The structure of NdPdCd2 was refined from single-crystal X-ray diffractometer data: a = 421.9(3), b = 995.4(7), c = 834.5(6) pm, wR = 0.0286, 451 structure factors, 16 variables. The palladium and cadmium atoms build up a three-dimensional [PdCd2] network (281 – 283 pm Pd–Cd; 298 – 335 pm Cd–Cd) in which the neodymium atoms fill cavities. They are connected to the [PdCd2] network via shorter Nd–Pd bonds of 286 pm.
منابع مشابه
Intermetallic Compounds RET Mg 2 ( RE = La , Pr , Nd ; T = Ni , Pd , Pt ) with MgCuAl 2 - type Structure
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تاریخ انتشار 2012