B. Belgacem

Structural and magnetic studies of a new intermetallic compound: Er2Cu10.9Ga6.1

A new ternary phase, Er 2 Cu 10.9 Ga 6.1 , has been found in the Er-Cu-Ga phase diagram. X-ray powder diffraction data were successfully refined based on a rhombohedral Th 2 Zn 17 structure type (space group R -3 m , No. 166) with cell parameters a =8.6627(1) A, c =12.6824(2) A, and Z =3. Er 2 Cu 10.9 Ga 6.1 exhibits a paramagnetic Curie-Weiss behaviour down to 2 K with a trivalent character of Er atoms.

A New Azelato Barium(II) Coordination Polymer Containing Chains of Water Molecules

The synthesis and characterization of α,ω-dicarboxylatecomplexes have attracted considerable attention during thepastdecade,duenotonlytotheirfascinatingstructures[1],butalso to their potential practical applications in a wide numberof fields [2].So far, extensive work has been carried out for carboxylatecomplexes and most of the reported studies have focused oncoordination frameworks with transition metal salts.Thepresentworkisacontinuationofearlierstudiesofalkaline-earthmetals(,(-dicarboxylatescomplexes[3].Toourknowledge,thenumberofstructuralstudiesofazelatecompoundsremainslimited[4]andnostructuralcharacterizationofalkaline-earthazelate have been reported. In this sense, a new aqua azelatoBa(II)complex(Ba(C