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Cu11In9 - Revised crystal structure and its (physicochemical) relation to Cu10In7

Müller, Carola LU and Lidin, Sven LU (2015) In Journal of Alloys and Compounds 638. p.393-397
Abstract
The literature data on the region at about 55-60 at.% Cu in the Cu-In phase diagram is somewhat confusing. With Cu10In7 and Cu11In9, two intermetallic compounds have been reported whose structures are alike and both are reported to be stable over a similar temperature range. Here, we show that Cu10In7 can be synthesized and characterized in agreement with the study by Piao and Lidin. Moreover, thermoanalytic methods (TA) reveal that Cu11In9, ht-Cu7In4 (A-phase) and In are formed upon cooling after re-melting of Cu10In7 without further heat treatments. For comparison, Cu11In9 has been synthesized using the original method by Rajasekharan and Schubert. Applying the same TA program to Cu11In9 the result from Cu10In7 was reproduced. Single... (More)
The literature data on the region at about 55-60 at.% Cu in the Cu-In phase diagram is somewhat confusing. With Cu10In7 and Cu11In9, two intermetallic compounds have been reported whose structures are alike and both are reported to be stable over a similar temperature range. Here, we show that Cu10In7 can be synthesized and characterized in agreement with the study by Piao and Lidin. Moreover, thermoanalytic methods (TA) reveal that Cu11In9, ht-Cu7In4 (A-phase) and In are formed upon cooling after re-melting of Cu10In7 without further heat treatments. For comparison, Cu11In9 has been synthesized using the original method by Rajasekharan and Schubert. Applying the same TA program to Cu11In9 the result from Cu10In7 was reproduced. Single crystal X-ray diffraction experiments prove that the reported crystal structure analysis of Cu11In9 is incomplete. We find a unit cell in agreement with that reported (as a = 12.8212(6)angstrom, b = 4.3548(5) angstrom, c = 7.3574(3)angstrom, beta = 125.523(1)degrees), but the structure is somewhat different containing an additional, partially occupied position and a different elemental balance on one mixed position. (C) 2015 Elsevier B.V. All rights reserved. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Intermetallics, Cu-In phase diagram, Crystal structure
in
Journal of Alloys and Compounds
volume
638
pages
393 - 397
publisher
Elsevier
external identifiers
  • wos:000353377500059
  • scopus:84931287810
ISSN
0925-8388
DOI
10.1016/j.jallcom.2015.03.106
language
English
LU publication?
yes
id
32b86ad5-37eb-460f-932b-7597bcc0e642 (old id 7432897)
date added to LUP
2015-06-24 14:19:59
date last changed
2017-01-01 05:41:12
@article{32b86ad5-37eb-460f-932b-7597bcc0e642,
  abstract     = {The literature data on the region at about 55-60 at.% Cu in the Cu-In phase diagram is somewhat confusing. With Cu10In7 and Cu11In9, two intermetallic compounds have been reported whose structures are alike and both are reported to be stable over a similar temperature range. Here, we show that Cu10In7 can be synthesized and characterized in agreement with the study by Piao and Lidin. Moreover, thermoanalytic methods (TA) reveal that Cu11In9, ht-Cu7In4 (A-phase) and In are formed upon cooling after re-melting of Cu10In7 without further heat treatments. For comparison, Cu11In9 has been synthesized using the original method by Rajasekharan and Schubert. Applying the same TA program to Cu11In9 the result from Cu10In7 was reproduced. Single crystal X-ray diffraction experiments prove that the reported crystal structure analysis of Cu11In9 is incomplete. We find a unit cell in agreement with that reported (as a = 12.8212(6)angstrom, b = 4.3548(5) angstrom, c = 7.3574(3)angstrom, beta = 125.523(1)degrees), but the structure is somewhat different containing an additional, partially occupied position and a different elemental balance on one mixed position. (C) 2015 Elsevier B.V. All rights reserved.},
  author       = {Müller, Carola and Lidin, Sven},
  issn         = {0925-8388},
  keyword      = {Intermetallics,Cu-In phase diagram,Crystal structure},
  language     = {eng},
  pages        = {393--397},
  publisher    = {Elsevier},
  series       = {Journal of Alloys and Compounds},
  title        = {Cu11In9 - Revised crystal structure and its (physicochemical) relation to Cu10In7},
  url          = {http://dx.doi.org/10.1016/j.jallcom.2015.03.106},
  volume       = {638},
  year         = {2015},
}