Cargando…

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...

Descripción completa

Detalles Bibliográficos
Autores principales: Eder, Felix, Weil, Matthias
Formato: Online Artículo Texto
Lenguaje:English
Publicado: International Union of Crystallography 2020
Materias:
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
_version_ 1783542501578113024
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)
title_full The crystal structure of a new CdTe(2)O(5) polymorph, isotypic with ∊-CaTe(2)O(5)
title_fullStr The crystal structure of a new CdTe(2)O(5) polymorph, isotypic with ∊-CaTe(2)O(5)
title_full_unstemmed The crystal structure of a new CdTe(2)O(5) polymorph, isotypic with ∊-CaTe(2)O(5)
title_short The crystal structure of a new CdTe(2)O(5) polymorph, isotypic with ∊-CaTe(2)O(5)
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
work_keys_str_mv AT ederfelix thecrystalstructureofanewcdte2o5polymorphisotypicwithcate2o5
AT weilmatthias thecrystalstructureofanewcdte2o5polymorphisotypicwithcate2o5
AT ederfelix crystalstructureofanewcdte2o5polymorphisotypicwithcate2o5
AT weilmatthias crystalstructureofanewcdte2o5polymorphisotypicwithcate2o5