Eu L-III-edge XAFS;
metal endohedral C-60;
endohedral structure;
off-center position;
mixed valence state;
D O I:
10.1107/S0909049598016288
中图分类号:
TH7 [仪器、仪表];
学科分类号:
0804 ;
080401 ;
081102 ;
摘要:
Eu Lm-edge XAFS spectrum for EuC60 was measured at room temperature in order to clarify the position of the Eu atom. The distances between the Eu atom and the neighboring C atoms determined by XAFS showed clearly that the Eu atom was in the inside of C-60 cage, and located on the off-center by 1.4 Angstrom. A XANES spectrum showed that the Eu atom took the mixed valence states of +2 and +3.