%0 Journal Article %A N. D. Zakharov %A I. P. Khadzhi %A V. N. Rozhanskii %T Structure-composition inhomogeneities of three-row ribbon-chain silicates observed by the method of high-resolution $n$-beam electron microscopy %J Doklady Akademii Nauk %D 1979 %P 359-362 %V 249 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1979_249_2_a24/ %G ru %F DAN_1979_249_2_a24