In the paper, physicochemical characteristics of niobium-containing concentrate with high content P2O5 in its were determinate. Their beginning, end softening temperatures and temperature range were experimentally estimated. Also, the density of concentrates defind by the picnometric method.Исследование выполнено за счет гранта Российского научного фонда № 21-19-00252, https://rscf.ru/project/21-19-00252/
