| Autor: |
Jeitschko, Wolfgang, Foecker, Aloys J., Paschke, Dirk, Dewalsky, Martin V., Evers, Ch. B. H., Künnen, Bernd, Lang, Arne, Kotzyba, Gunter, Rodewald, Ute Ch., Möller, Manfred H. |
| Zdroj: |
Zeitschrift für anorganische und allgemeine Chemie; May 2000, Vol. 626 Issue: 5 p1112-1120, 9p |
| Abstrakt: |
The new cubic compound Fe0.5Ni0.5P3(a= 775.29(5) pm) as well as the known compounds CoP3and NiP3were synthesized from the elemental components using tin as a flux. Their skutterudite (CoAs3) type structures were refined from single‐crystal X‐ray data. The new compound GdFe4P12was prepared by reaction of an alloy Gd1/3Fe2/3with phosphorus in a tin flux. Its cubic “filled” skutterudite (LaFe4P12type) structure was refined from single‐crystal X‐ray data: a= 779.49(4) pm, R= 0.019 for 304 structure factors and 11 variable parameters. SmFe4P12shows Van Vleck paramagnetism while GdFe4P12is a soft ferromagnet with a Curie temperature of TC= 22(5) K. Both are metallic conductors. The new isotypic polyarsenide NdFe4As12(a= 830.9(1) pm) was obtained by reacting NdAs2with iron and arsenic in the presence of a NaCl/KCl flux. The new isotypic polyantimonide Eu0.54(1)Co4Sb12(a= 909.41(8) pm) was prepared by reaction of EuSb2with cobalt and antimony. Its structure was refined from single‐crystal X‐ray data to a residual of 0.024 (137 Fvalues, 12 variables). A comparison of the Fe–P and P–P bond lengths in the compounds AFe4P12, where the Aatoms (A= Ce, Eu, Gd, Th) have differing valencies, suggests that the Fermi level cuts through Fe–P bonding and P–P antibonding bands. |
| Databáze: |
Supplemental Index |
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