Journal Article

PreJuSER-111852

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Crystal structures and stability of NaLnF4 (Ln = La, Ce, Pr, Nd, Sm and Gd) studied with synchrotron single-crystal and powder diffraction

Grzechnik, A. ; Friese, K.FZJ*

2012
Soc. London

This record in other databases:      

Please use a persistent id in citations: http://hdl.handle.net/2128/7803  doi:10.1039/C2DT30650F

Abstract: 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.

Note: Record converted from VDB: 16.11.2012

---

Contributing Institute(s):

1. Streumethoden (PGI-4)
2. Streumethoden (JCNS-2)
3. Jülich-Aachen Research Alliance - Fundamentals of Future Information Technology (JARA-FIT)

Research Program(s):

1. Grundlagen für zukünftige Informationstechnologien (FUEK412) (FUEK412)
2. 544 - In-house Research with PNI (POF2-544) (POF2-544)

Appears in the scientific report 2012

---

Database coverage:
; ; Allianz-Lizenz / DFG ; Current Contents - Social and Behavioral Sciences ; JCR ; NCBI Molecular Biology Database ; Nationallizenz ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection

---