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Monoclinic 122-Type BaIr(2)Ge(2) with a Channel Framework: A Structural Connection between Clathrate and Layered Compounds
A new 122-type phase, monoclinic BaIr(2)Ge(2) is successfully synthesized by arc melting; X-ray diffraction and scanning electron microscopy are used to purify the phase and determine its crystal structure. BaIr(2)Ge(2) adopts a clathrate-like channel framework structure of the monoclinic BaRh(2)Si(...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2017
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5551861/ https://www.ncbi.nlm.nih.gov/pubmed/28773175 http://dx.doi.org/10.3390/ma10070818 |
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author | Gui, Xin Chang, Tay-Rong Kong, Tai Pan, Max T. Cava, Robert J. Xie, Weiwei |
author_facet | Gui, Xin Chang, Tay-Rong Kong, Tai Pan, Max T. Cava, Robert J. Xie, Weiwei |
author_sort | Gui, Xin |
collection | PubMed |
description | A new 122-type phase, monoclinic BaIr(2)Ge(2) is successfully synthesized by arc melting; X-ray diffraction and scanning electron microscopy are used to purify the phase and determine its crystal structure. BaIr(2)Ge(2) adopts a clathrate-like channel framework structure of the monoclinic BaRh(2)Si(2)-type, with space group P2(1)/c. Structural comparisons of clathrate, ThCr(2)Si(2), CaBe(2)Ge(2), and BaRh(2)Si(2) structure types indicate that BaIr(2)Ge(2) can be considered as an intermediate between clathrate and layered compounds. Magnetic measurements show it to be diamagnetic and non-superconducting down to 1.8 K. Different from many layered or clathrate compounds, monoclinic BaIr(2)Ge(2) displays a metallic resistivity. Electronic structure calculations performed for BaIr(2)Ge(2) support its observed structural stability and physical properties. |
format | Online Article Text |
id | pubmed-5551861 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2017 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-55518612017-08-11 Monoclinic 122-Type BaIr(2)Ge(2) with a Channel Framework: A Structural Connection between Clathrate and Layered Compounds Gui, Xin Chang, Tay-Rong Kong, Tai Pan, Max T. Cava, Robert J. Xie, Weiwei Materials (Basel) Article A new 122-type phase, monoclinic BaIr(2)Ge(2) is successfully synthesized by arc melting; X-ray diffraction and scanning electron microscopy are used to purify the phase and determine its crystal structure. BaIr(2)Ge(2) adopts a clathrate-like channel framework structure of the monoclinic BaRh(2)Si(2)-type, with space group P2(1)/c. Structural comparisons of clathrate, ThCr(2)Si(2), CaBe(2)Ge(2), and BaRh(2)Si(2) structure types indicate that BaIr(2)Ge(2) can be considered as an intermediate between clathrate and layered compounds. Magnetic measurements show it to be diamagnetic and non-superconducting down to 1.8 K. Different from many layered or clathrate compounds, monoclinic BaIr(2)Ge(2) displays a metallic resistivity. Electronic structure calculations performed for BaIr(2)Ge(2) support its observed structural stability and physical properties. MDPI 2017-07-18 /pmc/articles/PMC5551861/ /pubmed/28773175 http://dx.doi.org/10.3390/ma10070818 Text en © 2017 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Gui, Xin Chang, Tay-Rong Kong, Tai Pan, Max T. Cava, Robert J. Xie, Weiwei Monoclinic 122-Type BaIr(2)Ge(2) with a Channel Framework: A Structural Connection between Clathrate and Layered Compounds |
title | Monoclinic 122-Type BaIr(2)Ge(2) with a Channel Framework: A Structural Connection between Clathrate and Layered Compounds |
title_full | Monoclinic 122-Type BaIr(2)Ge(2) with a Channel Framework: A Structural Connection between Clathrate and Layered Compounds |
title_fullStr | Monoclinic 122-Type BaIr(2)Ge(2) with a Channel Framework: A Structural Connection between Clathrate and Layered Compounds |
title_full_unstemmed | Monoclinic 122-Type BaIr(2)Ge(2) with a Channel Framework: A Structural Connection between Clathrate and Layered Compounds |
title_short | Monoclinic 122-Type BaIr(2)Ge(2) with a Channel Framework: A Structural Connection between Clathrate and Layered Compounds |
title_sort | monoclinic 122-type bair(2)ge(2) with a channel framework: a structural connection between clathrate and layered compounds |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5551861/ https://www.ncbi.nlm.nih.gov/pubmed/28773175 http://dx.doi.org/10.3390/ma10070818 |
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