Before revision: thumbnail|Liquidus temperature curve in the binary glass system SiO2-Li2O , based on 91 published data collected in SciGlass; model fit from Glassproperties.com While chemically pure materials have a single melting point, chemical mixtures often partially melt at the solidus temperature (TS or Tsol), and fully melt at the higher liquidus temperature (TL or Tliq).
After revision: thumbnail|Liquidus temperature curve in the binary glass system SiO2-Li2O While chemically pure materials have a single melting point, chemical mixtures often partially melt at the solidus temperature (TS or Tsol), and fully melt at the higher liquidus temperature (TL or Tliq).