Synthesis and crystal structure of La(21)Cr(8−2a)Al(b)Ge(7−b)C(12) [a = 0.22 (2) and b = 0.758 (19)]

Single crystals of a new multinary chromium carbide, La(21)Cr(8−2a)Al(b)Ge(7−b)C(12) (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...

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Detalles Bibliográficos
Autores principales: Pabla, Jaskarun, Janssen, Yuri, Simonson, Jack W.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: International Union of Crystallography 2016
Materias:
Research Communications
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5095834/
https://www.ncbi.nlm.nih.gov/pubmed/27840709
http://dx.doi.org/10.1107/S2056989016015668
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author Pabla, Jaskarun
Janssen, Yuri
Simonson, Jack W.
author_facet Pabla, Jaskarun
Janssen, Yuri
Simonson, Jack W.
author_sort Pabla, Jaskarun
collection PubMed
description Single crystals of a new multinary chromium carbide, La(21)Cr(8−2a)Al(b)Ge(7−b)C(12) (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 Cr(4−a)C(6) clusters are distributed throughout a three-dimensional framework of Al, Ge, and La. The title compound is isotypic with La(21−δ)Mn(8) X (7)C(12) and R (21)Fe(8) X (7)C(12) (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.
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spelling pubmed-50958342016-11-11 Synthesis and crystal structure of La(21)Cr(8−2a)Al(b)Ge(7−b)C(12) [a = 0.22 (2) and b = 0.758 (19)] Pabla, Jaskarun Janssen, Yuri Simonson, Jack W. Acta Crystallogr E Crystallogr Commun Research Communications Single crystals of a new multinary chromium carbide, La(21)Cr(8−2a)Al(b)Ge(7−b)C(12) (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 Cr(4−a)C(6) clusters are distributed throughout a three-dimensional framework of Al, Ge, and La. The title compound is isotypic with La(21−δ)Mn(8) X (7)C(12) and R (21)Fe(8) X (7)C(12) (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. International Union of Crystallography 2016-10-11 /pmc/articles/PMC5095834/ /pubmed/27840709 http://dx.doi.org/10.1107/S2056989016015668 Text en © Pabla et al. 2016 http://creativecommons.org/licenses/by/2.0/uk/ This is an open-access article distributed under the terms of the Creative Commons Attribution Licence, which permits unrestricted use, distribution, and reproduction in any medium, provided the original authors and source are cited.
spellingShingle Research Communications
Pabla, Jaskarun
Janssen, Yuri
Simonson, Jack W.
Synthesis and crystal structure of La(21)Cr(8−2a)Al(b)Ge(7−b)C(12) [a = 0.22 (2) and b = 0.758 (19)]
title Synthesis and crystal structure of La(21)Cr(8−2a)Al(b)Ge(7−b)C(12) [a = 0.22 (2) and b = 0.758 (19)]
title_full Synthesis and crystal structure of La(21)Cr(8−2a)Al(b)Ge(7−b)C(12) [a = 0.22 (2) and b = 0.758 (19)]
title_fullStr Synthesis and crystal structure of La(21)Cr(8−2a)Al(b)Ge(7−b)C(12) [a = 0.22 (2) and b = 0.758 (19)]
title_full_unstemmed Synthesis and crystal structure of La(21)Cr(8−2a)Al(b)Ge(7−b)C(12) [a = 0.22 (2) and b = 0.758 (19)]
title_short Synthesis and crystal structure of La(21)Cr(8−2a)Al(b)Ge(7−b)C(12) [a = 0.22 (2) and b = 0.758 (19)]
title_sort synthesis and crystal structure of la(21)cr(8−2a)al(b)ge(7−b)c(12) [a = 0.22 (2) and b = 0.758 (19)]
topic Research Communications
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5095834/
https://www.ncbi.nlm.nih.gov/pubmed/27840709
http://dx.doi.org/10.1107/S2056989016015668
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