The glass samples were prepared by using high purity grade of
Bi2O3, BaCO3, and H3BO3 in the composition range of (weight%)
xRmOn: (100 x)B2O3 for x = 30–70 (where RmOn = Bi2O3 and
BaO). Each batch weighs about 50 g was melt in alumina crucibles
by placing them in an electrical furnace for an hour, at 1200 C till a
bubble free liquid was formed. These melts were quenched at room
temperature in air by pouring between the melt on a stainless steel
plate and pressing with another stainless steel plate. The quenched
glasses were annealed at 500 C for 3 h for reduce thermal stress,
and cool down to the room temperature. All glass samples were
cut and polish in proper shape for further studies. At the room temperature,
densities (q) of all glass samples were measured by
Archimedes’s method using xylene as an immersion liquid. The
density is calculated according to the formula;