TY - JOUR
T1 - Dielectric properties and structure of Bi4NbO8Cl and Bi4TaO8Cl
AU - Kusainova, AM
AU - Yu, S
AU - Stefanovich, ~Missing Data
AU - Dolgikh, VA
AU - Mosunov, AV
AU - Hervoches, CH
AU - Lightfoot, Philip
PY - 2001
Y1 - 2001
N2 - The layered intergrowth phases Bi4MO8Cl (M = Nb, Ta), structurally related to the well-known Aurivillius phase ferroelectrics, have been studied using SHG and a.c. impedance techniques. Both undergo a polar to centrosymmetric phase ferroelectric-type transition (T-c = 765 and 640 K for M = Nb and Ta, respectively). The crystal structure of the low temperature phase of Bi4NbO8Cl has been re-analysed, and a tentative structure for Bi4TaO8Cl determined, from powder neutron diffraction data. The basic structural features are confirmed, but significant details differ from the previously reported X-ray structure of Bi4NbO8Cl.
AB - The layered intergrowth phases Bi4MO8Cl (M = Nb, Ta), structurally related to the well-known Aurivillius phase ferroelectrics, have been studied using SHG and a.c. impedance techniques. Both undergo a polar to centrosymmetric phase ferroelectric-type transition (T-c = 765 and 640 K for M = Nb and Ta, respectively). The crystal structure of the low temperature phase of Bi4NbO8Cl has been re-analysed, and a tentative structure for Bi4TaO8Cl determined, from powder neutron diffraction data. The basic structural features are confirmed, but significant details differ from the previously reported X-ray structure of Bi4NbO8Cl.
KW - BOND-VALENCE PARAMETERS
KW - AURIVILLIUS PHASES
KW - CRYSTAL-STRUCTURE
UR - http://www.scopus.com/inward/record.url?scp=0035064127&partnerID=8YFLogxK
M3 - Article
SN - 0959-9428
VL - 11
SP - 1141
EP - 1145
JO - Journal of Materials Chemistry
JF - Journal of Materials Chemistry
ER -