Maltseva Alexandra V. RussiaСамараSamara State Technical University, 443100, Samara Molodogvardeyskaya street, building №244samara200687@mail.ru Author's articles Study Phase Triangles LiNO3 – NaNO3 – NaI, LiNO3 – KNO3 – KI and LiNO3 – RbNO3 – RbI Ternary Mutual Range Systems Li,M || I,NO3 (M – Na, K, Rb)