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Indian Journal of Pure & Applied Physics (IJPAP) >
IJPAP Vol.44 [2006] >
IJPAP Vol.44(01) [January 2006] >
| Title: | Bonding parameter, phase parameter and Ni K-edge position studies of some Ni systems |
| Authors: | Singh, Vinod K |
| Keywords: | EXAFS
XAFS
K-edge X-ray absorption spectra |
| Issue Date: | Jan-2006 |
| Publisher: | CSIR |
| IPC Code: | G01J3/42 |
| Abstract: | Extended X-ray absorption fine structure (EXAFS) phase shift
studies of some nickel compounds have been carried out and the values of
bonding parameter a1
and phase parameter b1
are evaluated by graphical method. a1 is then correlated with nearest neighbour
distance and ionicity of the corresponding systems. It has been observed that
the bonding parameter a1 decreases as bond distance decreases except
in Ni3(PO4)2.XH2O and NiCl2.6H2O
and decreases with increase of the ionicity except for NiBr2. The
phase parameter b1
has been correlated with oxygen atoms present in a system. The nickel K-edge
position in the systems under study has been correlated with ionicity. No good
relation has been observed between ionicity and edge position. This has been
attributed to different structure and coordination number of a system. |
| Page(s): | 20-24 |
| ISSN: | 0975-1041 (Online); 0019-5596 (Print) |
| Source: | IJPAP Vol.44(01) [January 2006]
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