10.Ferro Frit 3224 M.P./°F 1600 Silica/Alumina ratio: 11.0:1 Equivalent Molecular Weight: 1021.178 Molecular Formula of Ferro Frit 3224: Na2O 0.879 Al2O3 0.913 SiO2 10.000 CaO 0.051 B2O3 3.850 MgO 0.070 Percentage Analysis 58.81 % SiO2 9.11 % Al2O3 5.34 % Na2O 0.28 % MgO 0.28 % CaO 26.18 % B2O3 _____________________ 100 % TOTAL Comments: 5.8 x 10-6 coefficient of expansion (50-450° C)