%0 Journal Article %A B. A. Maksimov %A N. V. Belov %T High-temperature, X-ray study of single crystals of $\mathrm{Na}_5\mathrm{YSi}_4\mathrm{O}_{12}$ %J Doklady Akademii Nauk %D 1981 %P 623-627 %V 261 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1981_261_3_a25/ %G ru %F DAN_1981_261_3_a25