Results of researches of fluorite complexational selective solution in collective bertrandite ([Si₂O₇](OH)₂)-phenacite (Ве₂[SiO₄])-fluorite (CaF₂) floatation concentrates from Ermakov's occurrence Zabaykalskiy mining and concentration company) by nitric acid solutions of aluminium nitrate has been wrote in the article. Complexation of metal ion with ion fluoride in water solutions and thermodynamic of nitric acid solutions Аl(NO₃)₃ interaction processes with Ermakov's concentrate components are considered in the article. Preliminary removal of fluorine by fluorite selective solution allows reducing beryllium losses in the processing of complex raw material of bertrandite-phenacite and beryl concentrates by sulphate process.