Synthesis and crystal structure of La21Cr8−2aAlbGe7−bC12 [a = 0.22 (2) and b = 0.758 (19)]

Synthesis and crystal structure of La21Cr8−2aAlbGe7−bC12 [a = 0.22 (2) and b = 0.758 (19)]

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...

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Main Authors: Jaskarun Pabla, Yuri Janssen, Jack W. Simonson
Format: Article
Language:English
Published: International Union of Crystallography 2016-11-01
Series:Acta Crystallographica Section E: Crystallographic Communications
Subjects:
crystal structure
geometric frustration
multinary chromium carbides
Online Access:http://scripts.iucr.org/cgi-bin/paper?S2056989016015668
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spelling doaj-62a61ee1f55c493bb3ac4864ec7bfece2020-11-24T23:47:22ZengInternational Union of CrystallographyActa Crystallographica Section E: Crystallographic Communications2056-98902016-11-0172111565156810.1107/S2056989016015668pk2592Synthesis and crystal structure of La21Cr8−2aAlbGe7−bC12 [a = 0.22 (2) and b = 0.758 (19)]Jaskarun Pabla0Yuri Janssen1Jack W. Simonson2Department of Physics, Farmingdale State College, Farmingdale, NY 11735, USADepartment of Physics, Farmingdale State College, Farmingdale, NY 11735, USADepartment of Physics, Farmingdale State College, Farmingdale, NY 11735, USASingle 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.http://scripts.iucr.org/cgi-bin/paper?S2056989016015668crystal structuregeometric frustrationmultinary chromium carbides
collection DOAJ
language English
format Article
sources DOAJ
author Jaskarun Pabla
Yuri Janssen
Jack W. Simonson
spellingShingle Jaskarun Pabla
Yuri Janssen
Jack W. Simonson
Synthesis and crystal structure of La21Cr8−2aAlbGe7−bC12 [a = 0.22 (2) and b = 0.758 (19)]
Acta Crystallographica Section E: Crystallographic Communications
crystal structure
geometric frustration
multinary chromium carbides
author_facet Jaskarun Pabla
Yuri Janssen
Jack W. Simonson
author_sort Jaskarun Pabla
title Synthesis and crystal structure of La21Cr8−2aAlbGe7−bC12 [a = 0.22 (2) and b = 0.758 (19)]
title_short Synthesis and crystal structure of La21Cr8−2aAlbGe7−bC12 [a = 0.22 (2) and b = 0.758 (19)]
title_full Synthesis and crystal structure of La21Cr8−2aAlbGe7−bC12 [a = 0.22 (2) and b = 0.758 (19)]
title_fullStr Synthesis and crystal structure of La21Cr8−2aAlbGe7−bC12 [a = 0.22 (2) and b = 0.758 (19)]
title_full_unstemmed Synthesis and crystal structure of La21Cr8−2aAlbGe7−bC12 [a = 0.22 (2) and b = 0.758 (19)]
title_sort synthesis and crystal structure of la21cr8−2aalbge7−bc12 [a = 0.22 (2) and b = 0.758 (19)]
publisher International Union of Crystallography
series Acta Crystallographica Section E: Crystallographic Communications
issn 2056-9890
publishDate 2016-11-01
description 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.
topic crystal structure
geometric frustration
multinary chromium carbides
url http://scripts.iucr.org/cgi-bin/paper?S2056989016015668
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AT yurijanssen synthesisandcrystalstructureofla21cr82aalbge7bc12a0222andb075819
AT jackwsimonson synthesisandcrystalstructureofla21cr82aalbge7bc12a0222andb075819
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