LOCAL STRUCTURES AROUND PB(II) AND SN(II) IN CH(3)NH(3)PBX(3) (X=CL, BR, I) AND CH(3)NH(3)SNX(3) (X=BR, I) STUDIED BY PB L(III)-EDGE AND SNK-EDGE EXAFS
H. Ishida et al., LOCAL STRUCTURES AROUND PB(II) AND SN(II) IN CH(3)NH(3)PBX(3) (X=CL, BR, I) AND CH(3)NH(3)SNX(3) (X=BR, I) STUDIED BY PB L(III)-EDGE AND SNK-EDGE EXAFS, Physica status solidi. a, Applied research, 159(2), 1997, pp. 277-282
Local structures around Pb(II) and Sn(II) in CH(3)NH(3)PbX(3) (X=Cl, B
r, I) and CH(3)NH(3)SnX(3) (X=Br, I) were studied by Pb L(III)-edge an
d Sn K-edge EXAFS in the temperature range of 10 to 293 K. The M-X dis
tances (M=Pb, Sn; X=Cl, Br, I), the coordination numbers, and the Deby
e-Waller factors were determined in three, four, three, five, and two
solid phases of CH3NH3PbCl3, CH3NH3PbBr3, CH3NH3PbI3, CH3NH3SnBr3, and
CH3NH3SnI3, respectively. Five kinds of deformed octahedra consisting
of halogens were observed.