We can see these tiny changes of interatomic distances with an even smaller sonde (X-rays). One of the
techniques is called “Extended Fine Structure X-Ray Absorption” It works in the following manner:
1. X-ray (synchrotron radiation) is tuned to the energy of an internal-electron level of the probe atom.
2. An absorbed X-ray quantum releases an electron from this atom.
3. This electron (i.e. the quantum wave objects) interfers with itself, getting scattered on neighborourhood atoms.
4. A fine structure, depending on the interatomic diustances is observed in the X-ray absorption. In
this mode the neighbourhood of the X-ray absorping atom is exploited. |
Two inter-penetrating networks of corner sharing M4O tetrahedra with O-M-O linear coordination
Figures are from prof. P. Fornasini, University of Trento, Physics Department,
Thanks! |