Synthesis and structural characterization of the Ca2MnReO6 double perovskite
Autor(a) principal: | |
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Data de Publicação: | 2010 |
Outros Autores: | , , , , , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Cerâmica (São Paulo. Online) |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0366-69132010000200015 |
Resumo: | The Ca2Mn1Re1O6 double perovskite has been prepared in polycrystalline form by using the encapsulated quartz tube method. The partial oxygen pressure inside the quartz tube revealed this to be a crucial synthesis parameter for the production of a single structural phase sample. This parameter was controlled using the ratio between ReO2 and ReO3 content and the filling factor parameter (ratio between mass and total inner volume of the quartz tube). The morphology and chemical composition was investigated by scanning electron microscopy and energy dispersive X-ray spectroscopy. The crystal structure parameters were determined by analysis of the synchrotron high-resolution X-ray powder diffraction pattern. The analysis indicates that the sample is an ideal single-phase compound with a monoclinic crystal structure (space group P2(1)/n) with a = 5.44445(2) Å; b = 5.63957(3) Å; c = 7.77524(3) Å; and β = 90.18(1)º. Computer simulations were performed considering two cation valence configurations, namely, (i) Mn2+Re6+ or (ii) Mn3+Re5+, for the Ca2Mn1Re1O6 compound. XANES analysis measurements indicated +2.3 for the average valence of Mn (a mixture of Mn2+ and Mn3+) and +5.7 for the effective valence of Re (an intermediate valence between Re4+ (ReO2) and Re6+ (ReO3)). As a summary, we concluded there is a mixed valence configuration for Mn and Re in Ca2Mn1Re1O6 , taken into account the oxygen content of 6.0±0.1. |
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Cerâmica (São Paulo. Online) |
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Synthesis and structural characterization of the Ca2MnReO6 double perovskitedouble perovskiteX-ray diffractionlattice parametersThe Ca2Mn1Re1O6 double perovskite has been prepared in polycrystalline form by using the encapsulated quartz tube method. The partial oxygen pressure inside the quartz tube revealed this to be a crucial synthesis parameter for the production of a single structural phase sample. This parameter was controlled using the ratio between ReO2 and ReO3 content and the filling factor parameter (ratio between mass and total inner volume of the quartz tube). The morphology and chemical composition was investigated by scanning electron microscopy and energy dispersive X-ray spectroscopy. The crystal structure parameters were determined by analysis of the synchrotron high-resolution X-ray powder diffraction pattern. The analysis indicates that the sample is an ideal single-phase compound with a monoclinic crystal structure (space group P2(1)/n) with a = 5.44445(2) Å; b = 5.63957(3) Å; c = 7.77524(3) Å; and β = 90.18(1)º. Computer simulations were performed considering two cation valence configurations, namely, (i) Mn2+Re6+ or (ii) Mn3+Re5+, for the Ca2Mn1Re1O6 compound. XANES analysis measurements indicated +2.3 for the average valence of Mn (a mixture of Mn2+ and Mn3+) and +5.7 for the effective valence of Re (an intermediate valence between Re4+ (ReO2) and Re6+ (ReO3)). As a summary, we concluded there is a mixed valence configuration for Mn and Re in Ca2Mn1Re1O6 , taken into account the oxygen content of 6.0±0.1.Associação Brasileira de Cerâmica2010-06-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0366-69132010000200015Cerâmica v.56 n.338 2010reponame:Cerâmica (São Paulo. Online)instname:Universidade de São Paulo (USP)instacron:USP10.1590/S0366-69132010000200015info:eu-repo/semantics/openAccessCorrêa,H. P. SCavalcante,I. PSouza,D. OSantos,E. ZOrlando,M. T. DBelich,HSilva,F. JMedeiro,E. FPires,J. MPassamai,J. LMartinez,L. GRossi,J. Leng2010-08-11T00:00:00Zoai:scielo:S0366-69132010000200015Revistahttps://www.scielo.br/j/ce/PUBhttps://old.scielo.br/oai/scielo-oai.phpceram.abc@gmail.com||ceram.abc@gmail.com1678-45530366-6913opendoar:2010-08-11T00:00Cerâmica (São Paulo. Online) - Universidade de São Paulo (USP)false |
dc.title.none.fl_str_mv |
Synthesis and structural characterization of the Ca2MnReO6 double perovskite |
title |
Synthesis and structural characterization of the Ca2MnReO6 double perovskite |
spellingShingle |
Synthesis and structural characterization of the Ca2MnReO6 double perovskite Corrêa,H. P. S double perovskite X-ray diffraction lattice parameters |
title_short |
Synthesis and structural characterization of the Ca2MnReO6 double perovskite |
title_full |
Synthesis and structural characterization of the Ca2MnReO6 double perovskite |
title_fullStr |
Synthesis and structural characterization of the Ca2MnReO6 double perovskite |
title_full_unstemmed |
Synthesis and structural characterization of the Ca2MnReO6 double perovskite |
title_sort |
Synthesis and structural characterization of the Ca2MnReO6 double perovskite |
author |
Corrêa,H. P. S |
author_facet |
Corrêa,H. P. S Cavalcante,I. P Souza,D. O Santos,E. Z Orlando,M. T. D Belich,H Silva,F. J Medeiro,E. F Pires,J. M Passamai,J. L Martinez,L. G Rossi,J. L |
author_role |
author |
author2 |
Cavalcante,I. P Souza,D. O Santos,E. Z Orlando,M. T. D Belich,H Silva,F. J Medeiro,E. F Pires,J. M Passamai,J. L Martinez,L. G Rossi,J. L |
author2_role |
author author author author author author author author author author author |
dc.contributor.author.fl_str_mv |
Corrêa,H. P. S Cavalcante,I. P Souza,D. O Santos,E. Z Orlando,M. T. D Belich,H Silva,F. J Medeiro,E. F Pires,J. M Passamai,J. L Martinez,L. G Rossi,J. L |
dc.subject.por.fl_str_mv |
double perovskite X-ray diffraction lattice parameters |
topic |
double perovskite X-ray diffraction lattice parameters |
description |
The Ca2Mn1Re1O6 double perovskite has been prepared in polycrystalline form by using the encapsulated quartz tube method. The partial oxygen pressure inside the quartz tube revealed this to be a crucial synthesis parameter for the production of a single structural phase sample. This parameter was controlled using the ratio between ReO2 and ReO3 content and the filling factor parameter (ratio between mass and total inner volume of the quartz tube). The morphology and chemical composition was investigated by scanning electron microscopy and energy dispersive X-ray spectroscopy. The crystal structure parameters were determined by analysis of the synchrotron high-resolution X-ray powder diffraction pattern. The analysis indicates that the sample is an ideal single-phase compound with a monoclinic crystal structure (space group P2(1)/n) with a = 5.44445(2) Å; b = 5.63957(3) Å; c = 7.77524(3) Å; and β = 90.18(1)º. Computer simulations were performed considering two cation valence configurations, namely, (i) Mn2+Re6+ or (ii) Mn3+Re5+, for the Ca2Mn1Re1O6 compound. XANES analysis measurements indicated +2.3 for the average valence of Mn (a mixture of Mn2+ and Mn3+) and +5.7 for the effective valence of Re (an intermediate valence between Re4+ (ReO2) and Re6+ (ReO3)). As a summary, we concluded there is a mixed valence configuration for Mn and Re in Ca2Mn1Re1O6 , taken into account the oxygen content of 6.0±0.1. |
publishDate |
2010 |
dc.date.none.fl_str_mv |
2010-06-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0366-69132010000200015 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0366-69132010000200015 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/S0366-69132010000200015 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
dc.publisher.none.fl_str_mv |
Associação Brasileira de Cerâmica |
publisher.none.fl_str_mv |
Associação Brasileira de Cerâmica |
dc.source.none.fl_str_mv |
Cerâmica v.56 n.338 2010 reponame:Cerâmica (São Paulo. Online) instname:Universidade de São Paulo (USP) instacron:USP |
instname_str |
Universidade de São Paulo (USP) |
instacron_str |
USP |
institution |
USP |
reponame_str |
Cerâmica (São Paulo. Online) |
collection |
Cerâmica (São Paulo. Online) |
repository.name.fl_str_mv |
Cerâmica (São Paulo. Online) - Universidade de São Paulo (USP) |
repository.mail.fl_str_mv |
ceram.abc@gmail.com||ceram.abc@gmail.com |
_version_ |
1748936781754007552 |