Text this: Structural, elastic and optical properties of xSrO- 10PbO-(90-x)B₂O₃, xPbO-30SrO-(70- x) B₂O₃ and xSrO-(90-x) B₂O₃-2CeO₂- 8A1₂O₃ borate glasses in borate anomaly region / Nurul Syahidah Sabri