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A. P. Simakov
A. P. Simakov
National Mineral Resources University (University of Mines)
National Mineral Resources University (University of Mines)

Co-authors

Articles

Present-day problems of geomechanics, mining practice and innovation technologies in mining engineering
  • Date submitted
    2011-09-12
  • Date accepted
    2011-11-17
  • Date published
    2012-03-01

Plagioclase’s iridescent as mineralogical sign of pegmatites with large-crystalline muscovite (North Baikal muscovite province)

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Geological and mineralogical research were conducted by the scanning probe microscopy and showed that in plagioclase pegmatites of North Baikal muscovite province the average thickness of the peristerites increases from early graphic zones to late trochlear zones and pegmatoid zones of pegmatite veins. The thickness reaches a maximum in the pegmatites of pegmatoid structure which contain large-crystalline muscovite. This regularity can be used for development mineralogical criteria for evaluation of pegmatite veins productivity at the large size muscovite source.

How to cite: Ivanov M.A., Simakov A.P. Plagioclase’s iridescent as mineralogical sign of pegmatites with large-crystalline muscovite (North Baikal muscovite province) // Journal of Mining Institute. 2012. Vol. 197. p. 174.
Geology and geophsics
  • Date submitted
    2010-07-18
  • Date accepted
    2010-09-16
  • Date published
    2011-01-01

Two genetic types of peristerites in iridescent plagioclases

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Physico-mathematical modeling has shown that color of iridescent depends on spacing of peristerite lattice. The more spacing lattice, the color of iridescent is higher. The phenomenon of iridescent in plagioclases has an interferential nature. We can select two genetic types of peristerites: peristerites of decomposition and segregation peristerites. Segregation peristerites are formed from postcrystallizational consolidation of peristerites of decomposition. The form of segregation pertisrerites is one of the reasons of polychromatic iridescent genesis in plagioclases.

How to cite: Ivanov M.A., Simakov A.P. Two genetic types of peristerites in iridescent plagioclases // Journal of Mining Institute. 2011. Vol. 189. p. 30.
Geology
  • Date submitted
    2009-08-10
  • Date accepted
    2009-10-15
  • Date published
    2010-02-01

Spacing of lattice in labradorite and interference model of iridescent

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Spacing of lattice for non-iridescent labradorite, blue-iridescent labradorite, green-iridescent labradorite and red-iridescent labradorite were determined with scanning probe electron microscope. Lattice spacing increases the dynamical trend for different kinds of labradorite, line non-iridescent labradorite (107,5 ± 10 nm), blue-iridescent labradorite (150 ± 10 nm), green-iridescent labradorite (196 ± 10 nm), red-iridescent (231 ± 10 nm). This trend let is state iridescent of these samples to be caused by interference of secondary order.

How to cite: Simakov A.P. Spacing of lattice in labradorite and interference model of iridescent // Journal of Mining Institute. 2010. Vol. 186. p. 38.
Geology
  • Date submitted
    2006-11-21
  • Date accepted
    2007-01-09
  • Date published
    2007-05-01

Investigations by small-angle X-ray scattering of nanoparticles in the irizing labrador and features of mineral powders at the nanoscale

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Samples of iridescent and non-iridescent labradorite, albite and quartz were investigated by the method of small-angle X-ray scattering. An X-ray unit with a Kratky U-shaped collimator at a wavelength of 1.51Å was used in the studies. Labradorite plates 0.1-0.2 mm thick and powdered minerals cut across the crystallographic axis were used as samples. Anisotropic scattering in iridescent labradorite plates was detected for the first time ever. This scattering is probably related to structural defects in iridescent crystals, characteristic sizes of which are 50-150 nm. Small-angle X-ray scattering curves obtained for rainbow-center labradorite and albite in the coordinates "scattering intensity" - "backspace vector modulus" show a pronounced rectilinear dependence on a logarithmic scale. The fractal parameter Do of these curves is equal to2. This indicates that the studied plagioclase powder particles are characterized by a flat surface in a wide size range from 10 to 150 nm. Similar scattering characteristics were obtained in the study of quartz powder. It can be tentatively assumed that these X-ray scattering features do not depend on the cleavage characteristics.

How to cite: Simakov A.P. Investigations by small-angle X-ray scattering of nanoparticles in the irizing labrador and features of mineral powders at the nanoscale // Journal of Mining Institute. 2007. Vol. 173. p. 23-26.
Geology
  • Date submitted
    2006-07-14
  • Date accepted
    2006-09-01
  • Date published
    2007-01-01

Nano-irregularities in plagioclases. Features of small-angle X-ray scattering from crystalline mineral powders

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Powders of irizing and non-irizing plagioclases (labrador and albite) were studied using a small-angle X-ray camera. The obtained curves of X-ray small-angle scattering in the coordinates "scattering intensity" - "backspace vector modulus" on a double logarithmic scale reveal a pronounced rectilinear dependence. The fractal dimensionality for these curves is D=2. This indicates that the particles of the studied plagioclase powders have a flat surface in a wide range of sizes from 10 to 150nm. It is assumed that during mineral grinding, fractures occur predominantly along certain planes. A similar scattering pattern is observed on quartz powders: a rectilinear dependence and fractal dimension D=2 are obtained. It is assumed that this peculiarity of X-ray scattering is not related to the property of mineral cleavage.

How to cite: Simakov A.P. Nano-irregularities in plagioclases. Features of small-angle X-ray scattering from crystalline mineral powders // Journal of Mining Institute. 2007. Vol. № 1 170. p. 46-49.
Fundamental and humanitarian research
  • Date submitted
    2005-06-04
  • Date accepted
    2005-07-09
  • Date published
    2006-01-01

Experience of application of small angle X-ray scattering for detection of nano-homogeneities in irizing labrador crystals

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Irizing and non-irizing labrador have been studied by small-angle X-ray scattering for a wavelength of 1.51angstrom (Cu-alpha). Plates of 0.1-0.2 mm thickness cut perpendicular to the c crystallographic axis were investigated. For the experiment, an X-ray setup with a U-shaped Kratky collimator was used. Two types of scattering were detected for the first time: anisotropic and isotropic. Anisotropic scattering is characteristic only for irizing labradors. It is observed at angles of 1-5 mrad and decreases with increasing scattering angle. The isotropic scattering has a maximum at an angle of 8 mrad, the position of which does not depend on the irization of the sample. Anisotropic scattering is presumably associated with defects in the structure of irizing crystals, characteristic sizes of which are 500-1500 angstroms. Isotropic scattering is apparently determined by structural elements with linear dimensions of 150-180 Å.

How to cite: Simakov A.P. Experience of application of small angle X-ray scattering for detection of nano-homogeneities in irizing labrador crystals // Journal of Mining Institute. 2006. Vol. № 1 167. p. 292-294.
Humanities and fundamental researches
  • Date submitted
    2002-06-11
  • Date accepted
    2002-07-30
  • Date published
    2003-01-01

The Art of the Blade - the Call of Freedom

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An attempt is made to consider the problem of spiritual freedom through a particular symbol - edged weapons. Information is given about the main schools of the blade, internal training of a warrior. As one of the modern manifestations of the art of the blade the film "Crouching tiger, lurking dragon" is analyzed. Its main characters show the difference between a true master, who has learned harmony, and a fighter who did not devote enough time to internal training. The philosophical conclusions of the Wudang school can still facilitate some decisive choices for man today. The eternal truths help us to find peace within ourselves and to reconcile with the world around us.

How to cite: Simakov A.P. The Art of the Blade - the Call of Freedom // Journal of Mining Institute. 2003. Vol. № 1 155. p. 279-280.