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The crystal structure of a new CdTe(2)O(5) polymorph, isotypic with ∊-CaTe(2)O(5)
Single crystals of cadmium pentaoxidoditellurate(IV), CdTe(2)O(5), were obtained as by-products in a hydrothermal reaction of Cd(NO(3))(2)·4H(2)O, TeO(2), H(6)TeO(6) and NH(3) (molar ratios 2:1:1:6) at 483 K for seven days. The crystals represent a different polymorph (henceforth referred to as th...
Autores principales: | , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
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International Union of Crystallography
2020
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7273983/ https://www.ncbi.nlm.nih.gov/pubmed/32523749 http://dx.doi.org/10.1107/S2056989020006283 |
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author | Eder, Felix Weil, Matthias |
author_facet | Eder, Felix Weil, Matthias |
author_sort | Eder, Felix |
collection | PubMed |
description | Single crystals of cadmium pentaoxidoditellurate(IV), CdTe(2)O(5), were obtained as by-products in a hydrothermal reaction of Cd(NO(3))(2)·4H(2)O, TeO(2), H(6)TeO(6) and NH(3) (molar ratios 2:1:1:6) at 483 K for seven days. The crystals represent a different polymorph (henceforth referred to as the β-form) than the α-CdTe(2)O(5) crystals grown from the melt, and are isotypic with hydrothermally grown ∊-CaTe(2)O(5). The asymmetric unit of β-CdTe(2)O(5) comprises one Cd, two Te and five O sites, all of which are located in general positions (Wyckoff position 4 e). The cadmium(II) atom is coordinated by seven oxygen atoms, forming (2) (∞)[CdO(6/2)O(1/1)] (100) layers. Both tellurium sites are surrounded by four oxygen atoms with one of them being at a significantly longer distance than the other three. The resulting bisphenoidal [TeO(4)] units also form layers propagating parallel to (100) by sharing edges with each other. The stereochemically active 5s (2) lone pair of the Te(IV) atoms leads to the formation of large channels extending along [011] and smaller ones along [010]. A quantitative comparison between the crystal structures of β-CdTe(2)O(5) and ∊-CaTe(2)O(5) is made. |
format | Online Article Text |
id | pubmed-7273983 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | International Union of Crystallography |
record_format | MEDLINE/PubMed |
spelling | pubmed-72739832020-06-09 The crystal structure of a new CdTe(2)O(5) polymorph, isotypic with ∊-CaTe(2)O(5) Eder, Felix Weil, Matthias Acta Crystallogr E Crystallogr Commun Research Communications Single crystals of cadmium pentaoxidoditellurate(IV), CdTe(2)O(5), were obtained as by-products in a hydrothermal reaction of Cd(NO(3))(2)·4H(2)O, TeO(2), H(6)TeO(6) and NH(3) (molar ratios 2:1:1:6) at 483 K for seven days. The crystals represent a different polymorph (henceforth referred to as the β-form) than the α-CdTe(2)O(5) crystals grown from the melt, and are isotypic with hydrothermally grown ∊-CaTe(2)O(5). The asymmetric unit of β-CdTe(2)O(5) comprises one Cd, two Te and five O sites, all of which are located in general positions (Wyckoff position 4 e). The cadmium(II) atom is coordinated by seven oxygen atoms, forming (2) (∞)[CdO(6/2)O(1/1)] (100) layers. Both tellurium sites are surrounded by four oxygen atoms with one of them being at a significantly longer distance than the other three. The resulting bisphenoidal [TeO(4)] units also form layers propagating parallel to (100) by sharing edges with each other. The stereochemically active 5s (2) lone pair of the Te(IV) atoms leads to the formation of large channels extending along [011] and smaller ones along [010]. A quantitative comparison between the crystal structures of β-CdTe(2)O(5) and ∊-CaTe(2)O(5) is made. International Union of Crystallography 2020-05-15 /pmc/articles/PMC7273983/ /pubmed/32523749 http://dx.doi.org/10.1107/S2056989020006283 Text en © Eder and Weil 2020 http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution (CC-BY) Licence, which permits unrestricted use, distribution, and reproduction in any medium, provided the original authors and source are cited.http://creativecommons.org/licenses/by/4.0/ |
spellingShingle | Research Communications Eder, Felix Weil, Matthias The crystal structure of a new CdTe(2)O(5) polymorph, isotypic with ∊-CaTe(2)O(5) |
title | The crystal structure of a new CdTe(2)O(5) polymorph, isotypic with ∊-CaTe(2)O(5)
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title_full | The crystal structure of a new CdTe(2)O(5) polymorph, isotypic with ∊-CaTe(2)O(5)
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title_fullStr | The crystal structure of a new CdTe(2)O(5) polymorph, isotypic with ∊-CaTe(2)O(5)
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title_full_unstemmed | The crystal structure of a new CdTe(2)O(5) polymorph, isotypic with ∊-CaTe(2)O(5)
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title_short | The crystal structure of a new CdTe(2)O(5) polymorph, isotypic with ∊-CaTe(2)O(5)
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title_sort | crystal structure of a new cdte(2)o(5) polymorph, isotypic with ∊-cate(2)o(5) |
topic | Research Communications |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7273983/ https://www.ncbi.nlm.nih.gov/pubmed/32523749 http://dx.doi.org/10.1107/S2056989020006283 |
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