Phase segregation in mixed Nb-Sb double perovskites Ba2LnNb1-xSbxO6
The phase composition of two series of mixed Nb5+-Sb5+ double perovskites formed between the pairs Ba2EuNbO6-Ba2PrSbO6 and Ba2NdSbO6-Ba2NdNbO6 have been studied using synchrotron X-ray powder diffraction methods. In both series extensive phase segregation is observed demonstrating limited solubility...
| Main Authors: | , |
|---|---|
| Format: | Journal article |
| Language: | English |
| Published: |
2008
|
| _version_ | 1797073401719816192 |
|---|---|
| author | Saines, P Kennedy, B |
| author_facet | Saines, P Kennedy, B |
| author_sort | Saines, P |
| collection | OXFORD |
| description | The phase composition of two series of mixed Nb5+-Sb5+ double perovskites formed between the pairs Ba2EuNbO6-Ba2PrSbO6 and Ba2NdSbO6-Ba2NdNbO6 have been studied using synchrotron X-ray powder diffraction methods. In both series extensive phase segregation is observed demonstrating limited solubility of Sb5+ in these Nb5+ perovskites, irrespective of the precise structures of the double perovskite. Evidence for a monoclinic I2/m phase in the series formed between tetragonal I4/m Ba2EuNbO6 and rhombohedral R over(3, -) Ba2EuNbO6 is presented. It is postulated that this phase segregation is a consequence of competing bonding requirements of the Nb5+ and Sb5+ cations associated with their electronic configurations. © 2007 Elsevier Inc. All rights reserved. |
| first_indexed | 2024-03-06T23:21:36Z |
| format | Journal article |
| id | oxford-uuid:68e838d4-d90c-4078-bfad-43f1fd12384d |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T23:21:36Z |
| publishDate | 2008 |
| record_format | dspace |
| spelling | oxford-uuid:68e838d4-d90c-4078-bfad-43f1fd12384d2022-03-26T18:48:05ZPhase segregation in mixed Nb-Sb double perovskites Ba2LnNb1-xSbxO6Journal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:68e838d4-d90c-4078-bfad-43f1fd12384dEnglishSymplectic Elements at Oxford2008Saines, PKennedy, BThe phase composition of two series of mixed Nb5+-Sb5+ double perovskites formed between the pairs Ba2EuNbO6-Ba2PrSbO6 and Ba2NdSbO6-Ba2NdNbO6 have been studied using synchrotron X-ray powder diffraction methods. In both series extensive phase segregation is observed demonstrating limited solubility of Sb5+ in these Nb5+ perovskites, irrespective of the precise structures of the double perovskite. Evidence for a monoclinic I2/m phase in the series formed between tetragonal I4/m Ba2EuNbO6 and rhombohedral R over(3, -) Ba2EuNbO6 is presented. It is postulated that this phase segregation is a consequence of competing bonding requirements of the Nb5+ and Sb5+ cations associated with their electronic configurations. © 2007 Elsevier Inc. All rights reserved. |
| spellingShingle | Saines, P Kennedy, B Phase segregation in mixed Nb-Sb double perovskites Ba2LnNb1-xSbxO6 |
| title | Phase segregation in mixed Nb-Sb double perovskites Ba2LnNb1-xSbxO6 |
| title_full | Phase segregation in mixed Nb-Sb double perovskites Ba2LnNb1-xSbxO6 |
| title_fullStr | Phase segregation in mixed Nb-Sb double perovskites Ba2LnNb1-xSbxO6 |
| title_full_unstemmed | Phase segregation in mixed Nb-Sb double perovskites Ba2LnNb1-xSbxO6 |
| title_short | Phase segregation in mixed Nb-Sb double perovskites Ba2LnNb1-xSbxO6 |
| title_sort | phase segregation in mixed nb sb double perovskites ba2lnnb1 xsbxo6 |
| work_keys_str_mv | AT sainesp phasesegregationinmixednbsbdoubleperovskitesba2lnnb1xsbxo6 AT kennedyb phasesegregationinmixednbsbdoubleperovskitesba2lnnb1xsbxo6 |