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Vol. 5 (2002 year), No. 2

Makarov D.V., Kuznetsov V.Ya., Makarov V.N., Trofimenko T.A.
Influence of the pentlandite composition on its flotation characteristics (by roentgenometric data)

On the basis of the published data, microprobe and XRD-analyses it has been established that in the composition of the cooper-nickel ores (the Pechenga mining field) there are four types of pentlandite: ferriferous, usual, nickeliferous and cobaltous. The pentlandite composition influences on floatation properties of mineral. It has been experimentally proved that the nickeliferous pentlandite floats well enough, the cobaltous one - worse, and the pentlandite with a heightened iron content has the least floatoactivity.

(in Russian, стр.6, fig. 2, tables. 6, ref 14, MS Word 95, MS Word 95 36 Kb)

Vol. 16 (2013 year), No. 1

Masloboeva S.M., Kadyrova G.I., Zalkind O.A., Kuznetsov V.Ya.
Phase composition of niobium pentoxides doped with Mg2+ and Gd3+cations

In this work the XPA method and IR spectroscopy have been used to study the phase composition of (Nb)2(O)5:Mg and (Nb)2(O)5:Gd alloys in the concentration range of 0.05-1 mass.% Mg in (Nb)2(O)5 and 0.1-4 mass.% Gd in (Nb)2(O)5. The content of magnesium in niobium pentoxide at which the second phase, Mg(Nb)2(O)6, begins to form has been determined. It has been shown that in the studied gadolinium concentration range there exists only a low-temperature (Nb)2(O)5 modification.

(in Russian, стр.4, fig. 5, tables. 1, ref 8, Adobe PDF, Adobe PDF 0 Kb)