Zur Synthese und Kristallstruktur von Kupfercadmiumpyroboratoxid: Cu₂Cd(B₂O₅)O / Synthesis and Crystal Structure of Copper Cadmium Pyroborate Oxide: Cu₂Cd(B₂O₅)O

Abstract

Single crystals of the new compound Cu 2 Cd(B 2 O 5 )O have been prepared by B 2 O 3 /V 2 O 5 flux technique in a closed silver tube. Their structure is isotypic with Cu 2 Co(B 2 O 5 )O but its preparation is quite different. X-ray investigations on single crystals led to the space group C 5 2h -P2 1 /c (Nr. 14), a = 339.9(2); b = 1509.8(2); c = 927,0(1) pm; β = 93.19(1)°; Z = 4. The structure contains isolated B 2 O 5 groups and oxygen that is not coordinated to boron. Cadmium is octahedrally coordinated by oxygen, while copper exhibits a nearly square planar or a fivefold pyramidal coordination.