43.Ferro Frit 3831 M.P./°F 1700 Silica/Alumina ratio: 6.8:1 Equivalent Molecular Weight: 186.233 Molecular Formula of Ferro Frit 3831: K2O 0.238 Al2O3 0.194 SiO2 1.320 Na2O 0.139 CaO 0.405 BaO 0.218 Percentage Analysis 42.57 % SiO2 10.62 % Al2O3 12.04 % K2O 4.63 % Na2O 12.20 % CaO 17.95 % BaO _____________________ 100 % TOTAL Comments: 11.9 x 10-6 coefficient of thermal expansion (50-450° C)