New Scandium Platinum Silicides: ScPt2Si with ‘Inverse' MgCuAl2 Structure, and Sc5Pt9Si7, a Variant of the Zr2Fe12P7-Type

Walter Jung

Two new scandium platinum silicides, ScPt2Si (orthorhombic, Cmcm, a = 3.6653(6) Å, b = 9.831(1) Å, c = 6.967(1) Å, Z = 4) and Sc5Pt9Si7 (hexagonal, P6, a = 9.9418(5) Å, c = 3.8832(2) Å, Z = 1) were prepared by reaction of the elements in an electric arc furnace and subsequent annealing. The crystal structures were solved and refined from single crystal diffraction data. ScPt2Si crystallizes with an ‘inverse' MgCuAl2 structure while Sc5Pt9Si7 forms a variant of the Zr2Fe12P7 type.

Mots clés: Physical Sciences

Walter Jung. New Scandium Platinum Silicides: ScPt2Si with ‘Inverse' MgCuAl2 Structure, and Sc5Pt9Si7, a Variant of the Zr2Fe12P7-Type. Journal of Inorganic and General Chemistry / Zeitschrift für anorganische und allgemeine Chemie, 2009, 635 (6-7), pp.920. ⟨10.1002/zaac.200900101⟩. ⟨hal-00484136⟩