The structural phase transition in SrV(6)O(11).
Single-crystal X-ray diffraction and specific heat studies establish that strontium hexavanadium undecaoxide, SrV(6)O(11), undergoes a P6(3)/mmc to inversion twinned P6(3)mc structural transition as the temperature is lowered through 322 K. The P6(3)/mmc and P6(3)mc structures have been determined at 353 K and at room temperature, respectively. For the room-temperature structure, seven of the ten unique atoms lie on special positions, and for the 353 K structure all of the seven unique atoms sit on special positions. The P6(3)/mmc to P6(3)mc structural phase transition, accompanied by a magnetic transition, is a common characteristic of AV(6)O(11) compounds, independent of the identity of the A cations.
Department of Applied Physics, National Defense Academy, 1-10-20 Hashirimizu, Yokosuka, Kanagawa 239-8686, Japan. hata@nda.ac.jp
Yoshiaki
Y
Hata
Yasushi
Y
Kanke
Eiji
E
Kita