β"-alumina has, ideally, a spinel-like stoichiometry with an overall cation: anion ratio of 3:4. This has been shown by phase diagram studies of the system Na2OLi2OMgOAl2O3, which determined the range of β"-alumina compositions in lithia-stabilised, magnesia-stabilised and lithia/magnisia...
Although these glasses appear to be cation conductors, there is a small mixed anion effect in the electrical conductivity, viscosity, and glass transformation temperature. This effect is compared with the more common mixed alkali effect. The structure of these glasses is discussed in terms of the ...