Affiliation:
1. Institut für Anorganische Chemie der Universität zu Köln, Greinstraße 6, D-5000 Köln 41
Abstract
Ten new compounds with the general formula AB2P2 (A = Ca, Sr, Eu, Ba; B = Cu, Ni, Co, Fe, Mn) have been prepared and their structures determined. They are isotypic and crystallize in the ThCr2Si2 structure (space group I4/mmm) with the following constants:
CaCu1.75P2 a = 401.4 1 pm, c = 962.7(1) pm
CaNi2P2 a = 391.6 1 pm, c = 936.3(1) pm
CaCo2P2 a = 385.8 1 pm, c = 959.3(1) pm
CaFe2P2 a = 385.5 1 pm, c = 998.5(1) pm
SrCu1.75P2 a = 416.6 1 pm, c = 960.7(1) pm
EUCU1.75P2 a = 411.0 1 pm, c = 959.1(1) pm
SrCo2P2 a = 379.4 1 pm, c = 1161.0(1) pm
SrFe2P2 a = 382.5 1 pm, c = 1161.2(1) pm
BaFe2P2 a = 384.0 1 pm, c = 1244.2(1) pm
BaMn2P2 a = 403.7 1 pm, c = 1306.1(1) pm
While in Ca(Sr,Eu)Cu1.75P2 the P atoms form pairs, they are isolated from each other in the other compounds.
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