%0 Journal Article %A A. I. Boikova %A N. A. Toropov %A A. K. Kuznetsov %T Silicates of rare-earth elements as crystallochemical indicators. Solid solutions of tri-calcium silicates with lanthanum oxiorthosilicate %J Doklady Akademii Nauk %D 1964 %P 865-868 %V 156 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1964_156_4_a23/ %G ru %F DAN_1964_156_4_a23