Number Component Content Number Component Number
1 Al2O3 7.691% 6 MnO 0.106%
2 SiO2 30.220% 7 Fe2O3 10.258 %
3 P2O5 0.470% 8 Br 0.191%
4 SO3 4.499% 9 CaO 36.946 %
5 K2O 7.147% 10 TiO2 1.318%
6 MgO 1.154%      
Table 3: Characteristics of a mineral part of fuel shales in Leningrad field (excluded the organic part).