Neutron diffraction studies of temperature induced phase transitions in Rb2KFeF6 elpasolite

S. G. Vasilovsky (1) , V. V. Sikolenko (1, 2) , A. I. Beskrovny (1) , A. V. Belushkin (1) , I. N. Flerov (3) , Alain Tressaud (4) , A. M. Balagurov (1)

1 JINR - Joint Institute for Nuclear Research
2 Hahn-Meitner-Institut
3 Kirensky Institute of Physics, Siberian Division
4 ICMCB - Institut de Chimie de la Matière Condensée de Bordeaux

A neutron diffraction study of temperature induced phase transition in Rb2KFeF6 elpasolite has been performed. At room temperature the structure is cubic with space group Fm3m. At T = 170 K a structural phase transition takes place. Space group and atom coordinates in this phase has been defined. The crystal structure is good refined by orthorhombic space group Pmnn. Possible models are discussed.

Mots clés: Neutron diffraction; Elpasolites; Rietveld analysis

Domaines: Matériaux

S. G. Vasilovsky, V. V. Sikolenko, A. I. Beskrovny, A. V. Belushkin, I. N. Flerov, et al.. Neutron diffraction studies of temperature induced phase transitions in Rb2KFeF6 elpasolite. Zeitschrift für Kristallographie, 2006, 23 (suppl.), pp.467-472. ⟨10.1524/9783486992526-078⟩. ⟨hal-00326992⟩