On the glass transition temperature T_g against molar volume V_m plotting in arsenoselenide glasses

Dependence of glass transition temperature T-g (K) on overall mean bonding energy E (kJ/mol) in arsenoselenide glass reexamined under per-atom calculations is shown to obey linearized master equation T-g congruent to 418.(E-1.13). Compositional variations in T-g against molar volume V-m are plotted for g-AsxSe100-x taken within (0 <= x <= 65) domain assuming preferential cohesive Van der Waals (VDW) bonding between network-constituting entities. The T-g values are found to vary as inverse-alpha th power of V-m attaining distinct values for different networks, in part, OD-molecular (alpha = = 6/3 = 2), 1D-chained (alpha = = 5/3), 2D-layered (alpha = = 4/3), and 3D-spatial (alpha = =3/3 = 1). These variations originated from macroscopic geometry of VDW interaction are linearized in log-log presentation for networks dominated with chain-like 1D-entities (0 <= x < similar to 8) and cross-linked 3D-entities (similar to 8 < x < 30-33), while demonstrate non-linear behaviour for cross-linked 3D- and layered 2D-entities (30-33 < x < 40), and layered 2D- and molecular OD-entities (40 < x < 65). Appearance of molecular entities in g-AsxSe100-x (40 < x < 65) results in self-terminated loop in log log plotting of T-g(1/V-m) dependence.