This title appears in the Scientific Report :
2012
Please use the identifier:
http://dx.doi.org/10.1039/C2DT30650F in citations.
Please use the identifier: http://hdl.handle.net/2128/7803 in citations.
Crystal structures and stability of NaLnF4 (Ln = La, Ce, Pr, Nd, Sm and Gd) studied with synchrotron single-crystal and powder diffraction
Crystal structures and stability of NaLnF4 (Ln = La, Ce, Pr, Nd, Sm and Gd) studied with synchrotron single-crystal and powder diffraction
Crystal structures of the NaLnF(4) materials (Ln = La, Ce, Pr, Nd, Sm or Gd) were studied with synchrotron single-crystal and powder diffraction. The materials with Ln = La, Ce, Nd, Sm and Gd have the average β structure (P6, Z = 1) with partial ordering of the cations. A new type of a superstructur...
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Personal Name(s): | Grzechnik, A. |
---|---|
Friese, K. | |
Contributing Institute: |
Streumethoden; PGI-4 JARA-FIT; JARA-FIT Streumethoden; JCNS-2 |
Published in: | Dalton transactions, 41 (2012) S. 10258 - 10266 |
Imprint: |
London
Soc.
2012
|
Physical Description: |
10258 - 10266 |
DOI: |
10.1039/C2DT30650F |
PubMed ID: |
22797523 |
Document Type: |
Journal Article |
Research Program: |
In-house Research with PNI Grundlagen für zukünftige Informationstechnologien |
Series Title: |
Dalton Transactions
41 |
Link: |
Get full text Published under German "Allianz" Licensing conditions on 2012-07-13. Available in OpenAccess from 2013-07-13 |
Publikationsportal JuSER |
Please use the identifier: http://hdl.handle.net/2128/7803 in citations.
Crystal structures of the NaLnF(4) materials (Ln = La, Ce, Pr, Nd, Sm or Gd) were studied with synchrotron single-crystal and powder diffraction. The materials with Ln = La, Ce, Nd, Sm and Gd have the average β structure (P6, Z = 1) with partial ordering of the cations. A new type of a superstructure due to ordering of the cations and vacancies was found in NaPrF(4) (P3, Z = 6). It could be described using the group-subgroup relationships P6↔P3. Our observations suggest that the β structure is unstable and that the ordering is a slow process at ambient conditions. Upon compression, β-NaNdF(4), β-NaGdF(4) and the superstructure NaPrF(4) are stable to at least 8 GPa with no evidence for any pressure-induced disorder-order phenomena. |