2Rb2CO3 + 12Na2MoO4 + Na2SiO3 + 26HCl → Rb4[SiMo12O40] + 2CO2 + 26NaCl + 13H2O
Rubidium carbonate react with sodium molybdate, sodium metasilicate and hydrogen chloride to produce silicododekarubidium molybdate, carbon dioxide, sodium chloride and water. Hydrogen chloride - concentrated solution.