A general study of packing in oxide glass systems containing alkali

Packing as a probe of structure in alkaline earth glass systems

“…In this paper we expand the analysis to the packing of alkaline earth containing binary glasses, and compare these data to the trends reported in the alkali paper [1]. The packing fractions give us a dimensionless parameter that incorporates several general trends independent, in some cases, of the specific mass and size of the glass modifier.…”

“…There is another model for N 4 given by Kapoor [24] for the barium borate case that uses three compositional ranges, but it has values that are sufficiently similar to the model given by Chong [21] to offer no significant difference, and since the alkali packing described in [1] used the abundances from [21], we use the same for consistency.…”

“…Recently we have used packing fraction (pf) to describe the structure of binary alkali containing glasses [1]. In that paper two different packing behaviors were described, ionic and covalent.…”

A multinuclear NMR study of sodium–borovanadophosphate glasses

“…Network modifiers (in the present case Na + cations) do not play important role in the formation of the structure due to their small radii [20]. Q i notation is very useful for simple phosphate glasses [21], but it can be very confusing when having more than one network forming oxides.…”

Study of elastic moduli of lithium borobismuthate glasses using ultrasonic technique

“…This concept takes into account the coordination changes, the ionic radii and the packing fraction (pf) which is defined as the ionic volume divided by the molar volume [31][32][33]. The packing density is given by…”