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  1. No Access

    Article

    An Experimental Study of the Possible Use of Opoka as a Si Source in Glass Production of the Turkestan Region, Kazakhstan

    Three series of experiments have been conducted to study the possible replacement of quartz sand with opoka in the composition of the initial charge for glass production. The experiments were carried out at at...

    B. Ye. Zhakipbayev, Ya. O. Alferyeva… in Moscow University Geology Bulletin (2021)

  2. No Access

    Article

    Composition, Structure, and Conditions of Formation of Fluorine-Bearing Sodalite: Experimental Evidence

    Fluoro-sodalite was synthesized for the first time at temperatures of 400–800°C and H2O pressures of 1–2 kbar in the Si–Al–Na–H–O–F system. X-ray diffraction and infrared spectroscopic investigations showed that ...

    E. N. Gramenitskii, A. R. Kotel’nikov, T. I. Shchekina… in Geochemistry International (2018)

  3. No Access

    Article

    Synthesis and study of the chemical stability and strength of zirconium phosphates with the structure of langbeinite with imitators of high-level radioactive waste (HLRW)

    Crystalline zirconium phosphates with the langbeinite structure containing macroquantities of elements that imitate high-level radioactive waste (HLRW) (Cs 4.6 wt %, Sr 6.2 wt %, La 10.0 wt %, or U4+ 11.6 wt %) h...

    K. V. Martynov, A. N. Nekrasov, A. R. Kotel’nikov… in Glass Physics and Chemistry (2017)

  4. No Access

    Article

    Synthesis and study of structural analogs of kosnarite mineral under hydrothermal conditions

    Distribution of cations (Na, K, Cs, Sr) between kosnarite solid solutions differing in the framework composition (Ti/Zr, P/Si) and aqueous solutions at 200°C was studied. The energies of mixing of kosnarite so...

    K. V. Martynov, G. M. Akhmedzhanova, A. R. Kotel’nikov, I. G. Tananaev… in Radiochemistry (2015)

  5. No Access

    Article

    Unusual phase transformations in synthetic NaF-bearing fluid inclusions in quartz

    Z. A. Kotel’nikova, A. R. Kotel’nikov in Doklady Earth Sciences (2011)

  6. No Access

    Article

    Na2CO3-bearing fluids: Experimental study at 700°C and under 1, 2, and 3 kbar pressure using synthetic fluid inclusions in quartz

    Heterogeneous fluid equilibria in the second-type H2O-Na2CO3 system in the presence of SiO2 or SiO2 + NaAlSi3O8 were studied experimentally. Phase diagrams of the second-type systems are briefly described. Fluid ...

    Z. A. Kotel’nikova, A. R. Kotel’nikov in Geology of Ore Deposits (2011)

  7. No Access

    Article

    New representative in the sodalite structure type with extraframework anions [AlF6]3−

    The crystal structure of new synthetic aluminosilicate |Na7.38(AlF6)0.70(H2O)4.88|[(Si6.74Al5.26)O24]-SOD, which was obtained by hydrothermal synthesis (T = 650° C, P = 2 Kbar) in the Si-Al-Na-F-H2O system, has b...

    O. V. Yakubovich, A. R. Kotel’nikov, T. I. Shchekina… in Crystallography Reports (2011)

  8. No Access

    Article

    Immiscibility in sulfate-bearing fluid systems at high temperatures and pressures

    Fluid equilibria in the H2O-Na2SO4-SiO2 system were experimentally studied at 700 and 800°C and pressures of 1, 2, and 3 kbar using synthetic fluid inclusions in quartz. The obtained results indicated a heterogen...

    Z. A. Kotel’nikova, A. R. Kotel’nikov in Geochemistry International (2010)

  9. No Access

    Article

    Experimental study of heterogeneous fluid equilibria in silicate-salt-water systems

    Fluid inclusions in quartz have been synthesized from Na2SO4 and NaF solutions at 700–800°C and 1 and 2 kbar using the fracture healing method. Some experiments have been carried out in the presence of albite gel...

    Z. A. Kotel’nikova, A. R. Kotel’nikov in Geology of Ore Deposits (2010)

  10. No Access

    Article

    Ussingite from the Lovozero Alkaline massif: Calorimetric, thermal, and IR spectroscopic study

    A. R. Kotel’nikov, L. P. Ogorodova, L. V. Mel’chakova… in Geochemistry International (2010)

  11. No Access

    Article

    Liquid separation in the presence of vapor in synthetic fluid inclusions obtained from Na2CO3 solutions

    Z. A. Kotel’nikova, A. R. Kotel’nikov in Doklady Earth Sciences (2009)

  12. No Access

    Article

    Synthesis of phosphate-bearing matrices by the method of metasomatic replacement reactions

    V. A. Suvorova, A. M. Koval’skii, A. R. Kotel’nikov in Geochemistry International (2009)

  13. No Access

    Article

    An experimental study of Cl and S distribution between sodalite and fluid

    S and Cl distribution between sodalite and fluid was experimentally studied at temperatures of 300–800°C and pressure of 0.5–3 kbar. It is demonstrated that S is preferably distributed into fluid in equilibriu...

    A. R. Kotel’nikov, V. I. Tikhomirova, Z. A. Kotel’nikova… in Geochemistry International (2009)

  14. No Access

    Article

    Method of synthetic fluid inclusions in quartz in experimental study of the water-sodium sulfate system

    The aim of this study is to estimate the capability of the method of synthetic fluid inclusions in experimental investigation of the properties of aqueous salt solutions, whose phase diagram is attributed to t...

    Z. A. Kotel’nikova, A. R. Kotel’nikov in Geology of Ore Deposits (2009)

  15. No Access

    Article

    Metastability at cryometry of sulfate-containing synthetic fluid inclusions

    Z. A. Kotel’nikova, A. R. Kotel’nikov in Doklady Earth Sciences (2008)

  16. No Access

    Article

    Experimental study of loparite formation in complex fluid-magmatic systems

    N. I. Suk, A. R. Kotel’nikov in Doklady Earth Sciences (2008)

  17. No Access

    Article

    Mineral thermometry and the composition of fluids of the sodalite syenites of the Lovozero alkaline massif

    In order to determine the conditions of mineral formation, a suite of sodalite syenite samples was investigated from the differentiated complex and in part from the eudialyte lujavrite complex of the Lovozero ...

    N. I. Suk, A. R. Kotel’nikov, A. M. Koval’skii in Petrology (2007)

  18. No Access

    Article

    Isotopic thermometry of sodalite-bearing mineral associations

    V. I. Ustinov, A. R. Kotel’nikov, V. A. Grinenko in Geochemistry International (2007)

  19. No Access

    Article

    Hydrothermal synthesis and characterization of (Na,K)Ti2(PO4)3 solid solutions

    Na1−x KxTi2(PO4)3 (0 ≤ x ≤ 1) solid solutions are synthesized through ion exchange under hydrothermal conditions and a sol-gel process. The unit cell parameters are calculated for (Na,K) t...

    E. A. Asabina, V. I. Pet’kov, A. R. Kotel’nikov… in Russian Journal of Inorganic Chemistry (2006)

  20. No Access

    Article

    Temperature range for the formation of sodalite-bearing assemblages

    V. I. Ustinov, A. R. Kotel’nikov, V. A. Grinenko in Geochemistry International (2006)