Browsing ELibrary by Author "Kalinin D.V."

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DEPOSITS OF PRECIOUS OPAL: GENESIS AND SEARCH CRITERIA

Kalinin D.V.; Serdobintseva V.V. (2003)

Origin, growth, and steady existence of monodisperse silica spheres (MSS) composing precious opal are possible solely in concentrated alkaline solutions of silica. In Australian deserts, such solutions result from dissolution ...
NATURAL AND EXPERIMENTAL CONDITIONS OF FORMATION OF COARSE-GRAINED PRECIOUS OPAL (CRYSTAL SEEDING AND NUMBER OF CENTERS OF SUPRAMOLECULAR CRYSTALLIZATION)

Kalinin D.V.; Serdobintseva V.V.; Kuznetsova Ya.V. (2004)

Natural coarse-grained precious opal structures result from the concentration of suspensions of monodisperse silica spheres and their subsequent supramolecular crystallization at low pH values. These processes occur in ...
PERMOLECULAR CRYSTALLIZATION IN SUSPENSIONS OF MONODISPERSE SPHERICAL SILICA PARTICLES OF SUBMICROMETER SIZE

Kalinin D.V.; Serdobintseva V.V.; Danilyuk A.F.; Sobolev N.V. (2004)

The regular structures of noble opal form as a result of permolecular crystallization of concentrated suspensions of structural units (SU) represented by charged monodisperse spherical silica particles (MSSP) surrounded ...
SEDIMENTATION OF MONODISPERSE SILICA SPHERES AND THEIR COAGULATION AGGREGATION AT HIGH TEMPERATURES

Kalinin D.V.; Serdobintseva V.V. (2004)

The effect of high temperatures on the sedimentation of suspensions of monodisperse silica spheres (MSS) is considered. The MSS suspensions chosen as a model for our research, with ethanol as a dispersion medium, are stable ...
SUPRAMOLECULAR CRYSTALLIZATION IN MINERAL FORMATION PROCESSES

Kalinin D.V.; Serdobintseva V.V. (2001)

The process of formation of colloidal and metacolloidal minerals, which can give rise to monodisperse systems, is considered in the context of supramolecular crystallization. We present data on synthesis of monodisperse ...
THE MECHANISM OF SUPRAMOLECULAR CRYSTALLIZATION IN SUSPENSIONS OF MONODISPERSE SILICA SPHERES DURING THE FORMATION OF PRECIOUS OPAL

Serdobintseva V.V.; Kalinin D.V. (2000)

Active participation of dispersed and colloidal systems in hypergene and hydrothermal processes favors supramolecular crystallization during mineral formation. We discuss the mechanism of this crystallization by the example ...
THE ORIGIN OF LAYER-BY-LAYER ALTERNATION OF CUBIC AND HEXAGONAL SYMMETRY IN NATURAL AND SYNTHETIC NOBLE OPAL STRUCTURE

Kalinin D.V.; Plekhanov A.I.; Vosel S.V.; Sobolev N.V. (2003)

In suspensions of monodispersed spherical silica particles (MSSP) proceeds their sedimentation with formation of semi-liquid supramolecular crystals (SC). Solid MSSP in them are separated by liquid layers of a thickness ...
THE ROLE OF GRAVITY IN SUPRAMOLECULAR CRYSTALLIZATION DURING FORMATION OF PRECIOUS OPAL

Serdobintseva V.V.; Kalinin D.V. (2001)

Experimental studies have revealed a dependence of the rates of sedimentation and growth of supramolecular crystals on the degree of deionization of suspensions of monodisperse silica spheres. At low pH, the rate of ...
THIXOTROPY IN SUPRAMOLECULAR CRYSTALLIZATION AND GENESIS OF MACROSTRUCTURES OF PRECIOUS OPAL

Kalinin D.V.; Serdobintseva V.V.; Kuznetsova Ya.V. (2002)

At the initial stage of genesis of precious opal from concentrated suspensions of monodisperse silica spheres, supramolecular gel crystals with solid silica particles form. The latter are localized at the lattice sites and ...

Browsing ELibrary by Author "Kalinin D.V."

Browsing ELibrary by Author "Kalinin D.V."

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