Complex sentence: Phosphate glass has a substrate of phosphorus pentoxide (P 2 O 5), rather than the silica (SiO 2) of conventional silicate glasses and is used, for example, to make sodium lamps.
Split into simpler sentences: Phosphate glass has a substrate of phosphorus pentoxide (P 2 O 5), rather than the silica (SiO 2) of conventional silicate glasses. It is used, for example, to make sodium lamps.