Structural Investigations under High Pressure
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The high pressure structures of AX<SUB>2</SUB> compounds have been refined in situ up to 60 GPa in a diamond anvil cell with an imaging plate in the angle dispersive mode using a low power laboratory x-ray tube and/ or synchrotron radiation. Results for GeO<SUB>2</SUB> obtained using both sources are compared. Under the same conditions (pressure, hydrostaticity, completion of phase transformations), the refinements by the Rietveld method yielded identical atomic positions and cell parameters. A structure map of the AX<SUB>2</SUB> compounds as a function of the coordination number has been established. The transition pathways depend on the filling of the d orbitals.
- The Review of High Pressure Science and Technology
The Review of High Pressure Science and Technology 7, 295-297, 1998
The Japan Society of High Pressure Science and Technology