Ce2AgYb5/3Se6, La2CuErTe5, and Ce2CuTmTe5: Three new quaternary interlanthanide chalcogenides

作者：Babo Jean Marie; Albrecht Schmitt Thomas E^*

来源：Journal of Solid State Chemistry, 2013, 197: 414-419.

DOI：10.1016/j.jssc.2012.08.024

• Lanthanide chalcogenides
• Interlanthanide chalcogenides
• Mixed lanthanide tellurides

Three new ordered quaternary interlanthanide chalcogenides, Ce2AgYb5/3Se6, La2CuErTe5, and Ce2CuTmTe5, have been prepared by direct reaction of the elements in molten NaBr at 900 degrees C. Each compound forms a new structure-type. The Ce2AgYb5/3Se6 structure consists of (2)(infinity){[AgYb5/6Se6]6(-)} layers intercalated by Ce3+ cations. These layers are composed of col {[Yb5/3Se617- quadruplet ribbons of [YbSe619- octahedra and infinite (1)(infinity){[AgSe6](11-)} double chains of [AgSe5](9-). The La2CuErTe5 structure is made of one-dimensional (1)(infinity){[CuErTe5](6-)} ribbons separated by La3+ cations. These ribbons are formed by cis-edge sharing j[CuTe213l tetrahedral chains and trans-edge sharing (1)(infinity){[ErTe4](5-)} chains. While La2CuErTe5 crystallizes in the orthorhombic space group Pnma, Ce2CuTmTe5 crystallizes in the monoclinic space group C2/m. The latter crystal structure is assembled from (2)(infinity){[CuTmTe5](6-)} layers intercalated by Ce3+ cations. These layers consist of single (1)(infinity){[TmTe4](5-)} chains connected to each other through dimers or pseudo-double chains.

• 出版日期2013-1