Synthesis and crystal structure of La21Cr8−2aAlbGe7−bC12 [a = 0.22 (2) and b = 0.758 (19)]
| Autor: | Jaskarun Pabla, Yuri Janssen, Jack W. Simonson |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: | |
| Zdroj: | Acta Crystallographica Section E: Crystallographic Communications, Vol 72, Iss 11, Pp 1565-1568 (2016) |
| Druh dokumentu: | article |
| ISSN: | 2056-9890 20569890 |
| DOI: | 10.1107/S2056989016015668 |
| Popis: | Single crystals of a new multinary chromium carbide, La21Cr8−2aAlbGe7−bC12 (henicosalanthanum octachromium aluminium hexagermanium dodecacarbide), were grown from an La-rich self flux and were characterized by single-crystal X-ray diffraction. The face-centered cubic crystal structure is composed of isolated and geometrically frustrated regular Cr tetrahedra that are co-centered within regular C octahedra. These mutually separated Cr4−aC6 clusters are distributed throughout a three-dimensional framework of Al, Ge, and La. The title compound is isotypic with La21−δMn8X7C12 and R21Fe8X7C12 (R = La, Ce, Pr; X = Al, Bi, Ge, Sn, Sb, Te) and represents the first example of a Cr-based compound with this structure-type. |
| Databáze: | Directory of Open Access Journals |
| Externí odkaz: |
|