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Structure of rubidium–ammonium hexachlorotellurate [Rb0.8(NH4)0.2]2TeCl6 at room and low temperatures

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Title: Structure of rubidium–ammonium hexachlorotellurate [Rb0.8(NH4)0.2]2TeCl6 at room and low temperatures
Authors: Karray, R.1, Kabadou, A.1 AhlemKabadou@lycos.com, Ciśařová, I.2, Hassen, R. Ben1, Salah, A. Ben1
Source: Journal of Alloys & Compounds. Sep2004, Vol. 377 Issue 1/2, p85-90. 6p.
Subjects: Crystals, Rubidium, Spectrum analysis, Low temperatures
Abstract: The crystal structure of rubidium–ammonium hexachlorotellurate [Rb0.8(NH4)0.2]2TeCl6, has been determined by X-ray single crystal analysis at room and low temperatures (260 K). The space group at both temperatures is Fm&3macr;m with a≈10.2 Å, Z=4. The refinement converged, at room and low temperatures to R=0.021 and 0.011, respectively. The title compound has an antifluorite-type arrangement of NH4+/Rb+ and octahedral TeCl62- anions. At room temperature, the H atoms belonging to ammonium group exhibit a six-fold disorder about [1 1 1]. Decreasing of temperature induces an ordering of NH4+, evidenced by a three-fold H-disorder and a decreasing of the equivalent thermal values. IR and Raman spectroscopic studies at room temperature were performed to confirm results of the X-ray diffraction. [Copyright &y& Elsevier]
Copyright of Journal of Alloys & Compounds is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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Header DbId: egs
DbLabel: Engineering Source
An: 14188696
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
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  Label: Title
  Group: Ti
  Data: Structure of rubidium–ammonium hexachlorotellurate [Rb<subscript>0.8</subscript>(NH<subscript>4</subscript>)<subscript>0.2</subscript>]<subscript>2</subscript>TeCl<subscript>6</subscript> at room and low temperatures
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  Data: <searchLink fieldCode="AR" term="%22Karray%2C+R%2E%22">Karray, R.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Kabadou%2C+A%2E%22">Kabadou, A.</searchLink><relatesTo>1</relatesTo><i> AhlemKabadou@lycos.com</i><br /><searchLink fieldCode="AR" term="%22Ciśařová%2C+I%2E%22">Ciśařová, I.</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Hassen%2C+R%2E+Ben%22">Hassen, R. Ben</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Salah%2C+A%2E+Ben%22">Salah, A. Ben</searchLink><relatesTo>1</relatesTo>
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+Alloys+%26+Compounds%22">Journal of Alloys & Compounds</searchLink>. Sep2004, Vol. 377 Issue 1/2, p85-90. 6p.
– Name: Subject
  Label: Subjects
  Group: Su
  Data: <searchLink fieldCode="DE" term="%22Crystals%22">Crystals</searchLink><br /><searchLink fieldCode="DE" term="%22Rubidium%22">Rubidium</searchLink><br /><searchLink fieldCode="DE" term="%22Spectrum+analysis%22">Spectrum analysis</searchLink><br /><searchLink fieldCode="DE" term="%22Low+temperatures%22">Low temperatures</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: The crystal structure of rubidium–ammonium hexachlorotellurate [Rb0.8(NH4)0.2]2TeCl6, has been determined by X-ray single crystal analysis at room and low temperatures (260 K). The space group at both temperatures is Fm<F>&3macr;</F>m with <F>a≈10.2</F> Å, <F>Z=4</F>. The refinement converged, at room and low temperatures to <F>R=0.021</F> and 0.011, respectively. The title compound has an antifluorite-type arrangement of NH4+/Rb+ and octahedral TeCl62- anions. At room temperature, the H atoms belonging to ammonium group exhibit a six-fold disorder about [1 1 1]. Decreasing of temperature induces an ordering of NH4+, evidenced by a three-fold H-disorder and a decreasing of the equivalent thermal values. IR and Raman spectroscopic studies at room temperature were performed to confirm results of the X-ray diffraction. [Copyright &y& Elsevier]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Journal of Alloys & Compounds is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1016/j.jallcom.2004.01.032
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      – Code: eng
        Text: English
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      – SubjectFull: Crystals
        Type: general
      – SubjectFull: Rubidium
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      – SubjectFull: Spectrum analysis
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      – SubjectFull: Low temperatures
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      – TitleFull: Structure of rubidium–ammonium hexachlorotellurate [Rb0.8(NH4)0.2]2TeCl6 at room and low temperatures
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              Text: Sep2004
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