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1

Perovskiy, I., T. Panikorovskii, and D. Shushkov. "Effect of mineralizer and synthesis duration on sorption properties of sitinakite and ivanyukite." Vestnik of geosciences, no. 3 (May 15, 2024): 20–29. http://dx.doi.org/10.19110/geov.2024.3.3.

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Titanosilicates with the structure of sitinakite and ivanyukite were synthesized with the use of enrichment wastes of quartz-leucoxene concentrate (Yarega deposit, Komi Republic) by autoclave method. It was found that using a mixture of mineralizer KOH and NaOH at a concentration of 0.15 and 1 mol/l, K-Na sitinakite was formed. Increasing the concentration of KOH to 0.45 mol/L and decreasing NaOH to 0.7 mol/L led to crystallization of ivanyukite. The obtained titanosilicates are characterized by high sorption activity towards Sr2+ and Cs+ cations. Sorption capacity of K-Na sitinakite and ivany
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2

Panikorovskii, Taras L., Galina O. Kalashnikova, Anatoly I. Nikolaev, et al. "Ion-Exchange-Induced Transformation and Mechanism of Cooperative Crystal Chemical Adaptation in Sitinakite: Theoretical and Experimental Study." Minerals 12, no. 2 (2022): 248. http://dx.doi.org/10.3390/min12020248.

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The microporous titanosilicate sitinakite, KNa2Ti4(SiO4)2O5(OH)·4H2O, was first discovered in the Khibiny alkaline massif. This material is also known as IONSIV IE-911 and is considered as one of the most effective sorbents for Cs+ and Sr2+ from water solutions. We investigate a mechanism of cooperative crystal chemical adaptation caused by the incorporation of La3+ ions into sitinakite structure by the combination of theoretical (geometrical–topological analysis, Voronoi migration map calculation, structural complexity calculation) and empirical methods (PXRD, SCXRD, Raman spectroscopy, scann
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3

Perovskiy, Igor A., Dmitry A. Shushkov, Alexey V. Ponaryadov, et al. "Mineral Mimetic Material Sr-Exchanged Sitinakite of Different Crystallinity: Phase Transformations during Heat Treatment and the Strength of SR Fixation in a Ceramic Matrix." Materials 17, no. 9 (2024): 1991. http://dx.doi.org/10.3390/ma17091991.

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A simple method for the direct transformation of Sr-exchanged titanosilicate with the sitinakite structure (IONSIV) into ceramic material through cold pressing and subsequent sintering at 1100 °C for 4 h is presented. The temperature transformation of Sr-exchanged sitinakite showed the stages of recrystallization of the material with the formation of Sr-Ti phases matsubaraite (Sr4Ti5[Si2O7]2O8), jeppeite (SrTi6O13), tausonite (SrTiO3), and rutile. Leaching experiments showed the efficiency of fixation of Sr cations in a ceramic matrix; extraction into water does not exceed 0.01% and desorption
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4

Milne, Nicholas A., Christopher S. Griffith, John V. Hanna, Maria Skyllas-Kazacos, and Vittorio Luca. "Lithium Intercalation into the Titanosilicate Sitinakite." Chemistry of Materials 18, no. 14 (2006): 3192–202. http://dx.doi.org/10.1021/cm0523337.

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5

Dyer, Alan, Jon Newton, Luke O’Brien, and Scott Owens. "Studies on a synthetic sitinakite-type silicotitanate cation exchanger." Microporous and Mesoporous Materials 117, no. 1-2 (2009): 304–8. http://dx.doi.org/10.1016/j.micromeso.2008.07.003.

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6

Luca, Vittorio, John V. Hanna, Mark E. Smith, Michael James, David R. G. Mitchell, and John R. Bartlett. "Nb-substitution and Cs+ ion-exchange in the titanosilicate sitinakite." Microporous and Mesoporous Materials 55, no. 1 (2002): 1–13. http://dx.doi.org/10.1016/s1387-1811(02)00353-0.

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7

Trunov, Dmitry, and Grigorii Byzmarev. "SYNTHESIS OF TITANOSILICATE SORBENTS AND TESTING OF THEIR SORPTION PROPERTIES TOWARDS CESIUM FROM MODEL SOLUTIONS OF COMPLEX CHEMICAL COMPOSITION." Transaction Kola Science Centre 15, no. 1 (2024): 408–13. https://doi.org/10.37614/2949-1215.2024.15.1.067.

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The article presents data on the sorption properties of titanosilicate sorbents synthesized at the Nanomaterial Research Centre of the FRC “Kola Science Centre of the Russian Academy of Sciences” on the basis of available titanium-containing raw materials of the Kola Peninsula. Experimental confirmation of the possibility of sorption of Cs+ cations using synthetic analogues of the minerals ivanyukite, sitinakite and zorite from a solution of a complex chemical composition simulating the solute part of accumulated highly active waste is given. Low values of Kd (mL/g) were established for the st
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8

Tripathi, Akhilesh, Dmitri G. Medvedev, May Nyman, and Abraham Clearfield. "Selectivity for Cs and Sr in Nb-substituted titanosilicate with sitinakite topology." Journal of Solid State Chemistry 175, no. 1 (2003): 72–83. http://dx.doi.org/10.1016/s0022-4596(03)00145-2.

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9

Thorogood, Gordon J., Brendan J. Kennedy, Christopher S. Griffith, et al. "Structure and Phase Transformations in the Titanosilicate, Sitinakite. The Importance of Water." Chemistry of Materials 22, no. 14 (2010): 4222–31. http://dx.doi.org/10.1021/cm100727h.

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10

Perovskiy, Igor A., Elena V. Khramenkova, Evgeny A. Pidko, Pavel V. Krivoshapkin, Alexandr V. Vinogradov, and Elena F. Krivoshapkina. "Efficient extraction of multivalent cations from aqueous solutions into sitinakite-based sorbents." Chemical Engineering Journal 354 (December 2018): 727–39. http://dx.doi.org/10.1016/j.cej.2018.08.030.

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11

Medvedev, Dmitri G., Akhilesh Tripathi, Abraham Clearfield, Aaron J. Celestian, John B. Parise, and Jonathan Hanson. "Crystallization of Sodium Titanium Silicate with Sitinakite Topology: Evolution from the Sodium Nonatitanate Phase." Chemistry of Materials 16, no. 19 (2004): 3659–66. http://dx.doi.org/10.1021/cm049479a.

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12

Gainey, Seth R., Matheus T. Lauar, Christopher T. Adcock, Jacimaria R. Batista, Kenneth Czerwinski, and David W. Hatchett. "The influence of thermal processing on the sorption of Cs and Sr by sitinakite." Microporous and Mesoporous Materials 296 (April 2020): 109995. http://dx.doi.org/10.1016/j.micromeso.2019.109995.

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13

Celestian, A. J., M. Powers, and S. Rader. "In situ Raman spectroscopic study of transient polyhedral distortions during cesium ion exchange into sitinakite." American Mineralogist 98, no. 7 (2013): 1153–61. http://dx.doi.org/10.2138/am.2013.4349.

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14

Liu, Yao, Dong Yang, Renhe Wang, et al. "Niobium-Doped Titanosilicate Sitinakite Anode with Low Working Potential and High Rate for Sodium-Ion Batteries." ACS Sustainable Chemistry & Engineering 7, no. 4 (2019): 4399–405. http://dx.doi.org/10.1021/acssuschemeng.8b06326.

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15

Ferdov, Stanislav, Rute A. Sá Ferreira, and Zhi Lin. "Optical properties and local structure of Eu3+-doped synthetic analogue of the microporous titanosilicate mineral sitinakite." Journal of Luminescence 128, no. 7 (2008): 1108–12. http://dx.doi.org/10.1016/j.jlumin.2007.11.085.

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16

Milcent, Théo, Audrey Hertz, Yves Barré, and Agnès Grandjean. "Influence of the Nb content and microstructure of sitinakite-type crystalline silicotitanates (CSTs) on their Sr2+ and Cs+ sorption properties." Chemical Engineering Journal 426 (December 2021): 131425. http://dx.doi.org/10.1016/j.cej.2021.131425.

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17

Dyer, Alan, Jon Newton, Luke O’Brien, and Scott Owens. "Studies on a synthetic sitinakite-type silicotitanate cation exchanger. Part 2. Effect of alkaline earth and alkali metals on the uptake of Cs and Sr radioisotopes." Microporous and Mesoporous Materials 120, no. 3 (2009): 272–77. http://dx.doi.org/10.1016/j.micromeso.2008.11.016.

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18

Hall, Reece, and Jennifer Readman. "EXAFS studies of the metal coordination environments in mixed Ti/Zr silicates." Acta Crystallographica Section A Foundations and Advances 70, a1 (2014): C1526. http://dx.doi.org/10.1107/s2053273314084733.

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Microporous materials have a wide range of commercial uses from ion-exchangers to catalysts and have been used in the treatment of nuclear waste. The acidity associated with legacy waste pools often limits the effectiveness of these zeolites due to a loss of crystallinity. Microporous titanium silicates display different structural characteristics compared to conventional zeolites. Sitinakite, KNa2Ti4Si2O13(OH)·4H2O and the synthetic niobium doped analogue are being used as ion-exchange materials for the removal of Cs+and Sr2+from nuclear waste . Natisite is a layered titanium silicate with ti
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19

Milne, Nicholas A., Christopher S. Griffith, John V. Hanna, Maria Skyllas-Kazacos, and Vittorio Luca. "Lithium Intercalation into the Titanosilicate Sitinakite." ChemInform 37, no. 39 (2006). http://dx.doi.org/10.1002/chin.200639015.

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20

"Titanosilicate Sitinakite Compound As a Low-Potential Anode for Sodium-Ion Battery." ECS Meeting Abstracts, 2019. http://dx.doi.org/10.1149/ma2019-03/2/109.

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