The positional disorder of Mg2+ and Al3+ cations between the tetrahedral and octahedral sites in natural MgAl2O4 spinel has been investigated by 27Al MAS NMR at room temperature and in-situ high-temperature 27Al NMR ...
The effects of temperature on the structure of Na2Si2O5 glass and supercooled liquid has been investigated by high-temperature 29Si NMR measurements from room temperature to 719°C. The asymmetric line shape of the 29Si NMR ...