BaAl₄-Strukturvarianten bei ARu₂X₂(A = Ca, Sr, Ba, Eu; X = P, As) und APt₂P_2—x (A = Ca, Eu) / BaAl₄-Denvative Structures of ARu₂X₂ (A = Ca, Sr, Ba. Eu; X = P, As) and of APt₂P_2-x (A = Ca, Eu)

Open Access

1 January 1986

journal article
Published by Walter de Gruyter GmbH in Zeitschrift für Naturforschung B

Vol. 41 (1) , 38-43
https://doi.org/10.1515/znb-1986-0108

Abstract

Compounds ARu₂P(As)₂ (A = Ca, Sr. Ba. Eu) were found to have the ThCr₂Si₂-type structure (14/mmm). Single crystals of CaRu₂P₂ (a = 404.6 pm, c = 977.1 pm) and EuRu₂P₂ (a = 402.9 pm, c = 1077.2 pm) were obtained using tin as a flux. In the case of the Pt compounds, single crystals could be isolated from powder samples. Ca(Eu)Pt₂P_2-x crystallizes isotypically in a new structure type which can be described as a stacking variation of the CaBe₂Ge₂-type structure (14/mmm; CaPt₂P_1.43: a = 409.9 pm, c = 1895.1 pm; EuPt₂P₁.₆₂: a = 414.3 pm; c = 1912.0 pm). The crystal structures of Ca(Eu)Ru₂P₂ and Ca(Eu)Pt₂P_2-x were refined from four-circle diffractometer data. Magnetic susceptibility measurements prove the divalent nature of Eu in all Eu compounds.

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BaAl4-Strukturvarianten bei ARu2X2(A = Ca, Sr, Ba, Eu; X = P, As) und APt2P2—x (A = Ca, Eu) / BaAl4-Denvative Structures of ARu2X2 (A = Ca, Sr, Ba. Eu; X = P, As) and of APt2P2-x (A = Ca, Eu)

Abstract

Keywords

BaAl₄-Strukturvarianten bei ARu₂X₂(A = Ca, Sr, Ba, Eu; X = P, As) und APt₂P_2—x (A = Ca, Eu) / BaAl₄-Denvative Structures of ARu₂X₂ (A = Ca, Sr, Ba. Eu; X = P, As) and of APt₂P_2-x (A = Ca, Eu)