%0 Journal Article %A K. K. Palkina %A S. I. Maksimova %T Structure of crystals of double, mixed ortho-pyrophosphate of potassium and nickel, %J Doklady Akademii Nauk %D 1980 %P 1130-1134 %V 250 %N 5 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1980_250_5_a25/ %G ru %F DAN_1980_250_5_a25