The method of neutron diffraction coupled with isotopic substitution is presented and recent investigations on the environment around cations in silicate (Ti in K2O.TiO2.2SiO2, Ca and Ni in 2CaO.NiO.3SiO2) and aluminosilicate ...
High-resolution X-ray Absorption Near-Edge Structure (XANES) spectra of iron allow to take into account the effects of the coordination numbers on the quantification of redox values. Volcanic glasses show split pre-edge ...
Gehlen M.; Beck L.; Calas G.; Flank A.M.; van Bennekom A.J.; Van Beusekom J.E.E.(2002)
We used X-ray absorption spectroscopy at the Al K-edge to investigate the atomic structure of biogenic silica and to assess the effect of Al on its crystal chemistry. Our study provides the first direct evidence for a ...