Neue ternäre Boride der Erdalkalimetalle mit Rhodium und Iridium /New Ternary Borides of the Alkaline Earth Metals with Rhodium and Iridium
Open Access
- 1 September 1979
- journal article
- Published by Walter de Gruyter GmbH in Zeitschrift für Naturforschung B
- Vol. 34 (9) , 1221-1228
- https://doi.org/10.1515/znb-1979-0911
Abstract
The ternary borides SrRh2B2, SrIr2B2, BaRh2B2, BaIr2B2 and Ba7lr12Bi12 were prepared and structurally characterized. The crystallographic data are (pm): SrRh2B2 : Fddd, a = 1067.2, b= 939.9, c =598.9, Z = 8. SrIr2B2 : Fddd, a = 1072.3, b = 940.4, c =602.7, Z = 8. BaRh2B2 : I4/mmm, a = 391.5, c = 1125.0, c/a = 2.874, Z = 2. BaIr2B2 : I4/mmm, a = 393.5, c = 1140.7, c/a = 2.899, Z = 2. Ba7Ir12Bi12 : R3̄m, a = 1522.2, c = 835.8, c/a = 1.821, Z = 3. SrIr2B2 and SrRh2B2 are isostructural with CaIr2B2 and CaRh2B2, while BaRh2B2 and BaIr2B2 crystallize in the ThCr2Si2-type. Ba7lr12Bi2 has a new structure which contains structural elements of the compound SrIr2B2.Keywords
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