The new method for obtaining titanosilicate AM-4 and its decationated form: Crystal chemistry, properties and advanced areas of application

Kalashnikova, Galina O.; Zhitova, Elena S.; Selivanova, Ekaterina A.; Pakhomovsky, Yakov A.; Yakovenchuk, Victor N.; Ivanyuk, Gregory Yu.; Kasikov, А. G.; Drogobuzhskaya, Svetlana; Elizarova, I. R.; Kiselev, Yu. G.; Knyazeva, A. G.; Korovin, V. N.; Nikolaev, A. I.; Krivovichev, Sergey V.

doi:10.1016/j.micromeso.2020.110787

Cited by 14 publications

(14 citation statements)

References 24 publications

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“…AM-4-is a synthetic analog of the mineral lintisite that is used in this work for comparison of its sorption properties with those of SIV was obtained according to the methodology described in detail in [3,18,19].…”

Section: Materials and Their Abbreviationsmentioning

confidence: 99%

“…SL3-is the protonated form of AM-4 obtained according to the methods described in [3,18]. STA-is ammonium sulfate oxytitanium, (NH 4 ) 2 TiO(SO 4 ) 2 •H 2 O, the pre-product of titanite concentrate reprocessing (PJSC "PhosAgro", Apatity, Russia) [20].…”

Section: Materials and Their Abbreviationsmentioning

confidence: 99%

“…In contrast to othertitanosilicates discovered in the Khibiny Massif or Lovozero Massif (Kola Peninsula, Russia)-such as lintisite, zorite and sitinakite [2][3][4][5][6][7]-the synthetic of ivanyukite was was known prior to its mineralogical discovery, being obtained by D. Chapman and A. Roe in 1990 [8] under the name name 'grace titanium silicate' (GTS). For their synthesis process, the authors had used Ti(OC 2 H 5 ) 4 as a source of Ti.…”

Section: Introductionmentioning

confidence: 99%

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A Synthetic Analog of the Mineral Ivanyukite: Sorption Behavior to Lead Cations

et al. 2022

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The production of electrolytic nickel includes the stage of leaching of captured firing nickel matte dust. The solutions formed during this process contain considerable amounts of Pb, which is difficult to extraction due to its low concentration upon the high-salt background. The sorption of lead from model solutions with various compositions by synthetic and natural titanosilicate sorbents (synthetic ivanyukite-Na-T (SIV), ivanyukite-Na-T, and AM-4) have been investigated. The maximal sorption capacity of Pb is up to 400 mg/g and was demonstrated by synthetic ivanyukite In solutions with the high content of Cl− (20 g/L), extraction was observed only with a high amount of Na (150 g/L). Molecular mechanisms and kinetics of lead incorporation into ivanyukite were studied by the combination of single-crystal and powder X-ray diffraction, microprobe analysis, and Raman spectroscopy. Incorporation of lead into natural ivanyukite-Na-T with the R3m symmetry by the substitution 2Na+ + 2O2− ↔ Pb2+ + □ + 2OH− leds to its transformation into the cubic P−43m Pb-exchanged form with the empirical formulae Pb1.26[Ti4O2.52(OH)1.48(SiO4)3]·3.32(H2O).

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Section: Materials and Their Abbreviationsmentioning

confidence: 99%

Section: Materials and Their Abbreviationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A Synthetic Analog of the Mineral Ivanyukite: Sorption Behavior to Lead Cations

et al. 2022

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“…It has also been observed that, in acidic environments, AM-4 loses extra-framework Na cations and H 2 O molecules, with the acid-activated form being more efficient with respect to the adsorption of N 2 and CO 2 [ 48 ]. The acidic form of AM-4 can be used as a renewable sorbent for the Ag and I uptakes, with at least five cycles of transformation without loss of sorption properties [ 49 ]. Acid modification of AM-4 with HNO 3 is used for the reaction of catalysis cyclocondansation between 1,2-phenylenediamine and acetone [ 13 ] and transesterification of glycerol with dimethylcarbonate [ 50 ].…”

Section: Introductionmentioning

confidence: 99%

“…The L3 and K3 designations denote compounds obtained via the treatment of kukisvumite and lintisite during 3 h with 0.5 M hydrochloric acid [ 51 ]. The L3 material has the same powder pattern as the H-exchanged form of AM-4, whereas the powder diffraction pattern of K3 slightly differs from that of L3 [ 13 , 49 , 51 ].…”

Section: Introductionmentioning

confidence: 99%

The AM-4 Family of Layered Titanosilicates: Single-Crystal-to-Single-Crystal Transformation, Synthesis and Ionic Conductivity

Kalashnikova,

Krivovichev,

Yakovenchuk

et al. 2023

Materials

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Flexible crystal(水晶) structures, which exhibit(展览) single-crystal(水晶)-to-single-crystal(水晶) (SCSC) transformations(转型), are attracting attention(注意) in many applied aspects: magnetic(磁) switches, catalysis, ferroelectrics and sorption. Acid treatment(治疗) for titanosilicate material(材料) AM-4 and natural(自然) compounds with the same structures led to SCSC transformation(转型) by loss(损失) Na+, Li+ and Zn2+ cations with large structural(结构) changes (20% of the unit(单位)-cell(细胞) volume(体积)). The conservation(保育) of crystallinity through complex(复杂) transformation(转型) is possible due(由于) to the formation(形成) of a strong hydrogen bonding(债券) system(系统). The mechanism(机制) of transformation(转型) has been characterized using single-crystal(水晶) X-ray(射线) diffraction analysis(分析), powder(粉) diffraction, Rietvield refinement, Raman spectroscopy and electron microscopy. The low migration(迁移) energy(能源) of cations in the considered materials(材料) is confirmed using bond(债券)-valence and density(密度) functional(功能) theory(理论) calculations, and the ion conductivity of the AM-4 family’s materials(材料) has been experimentally verified.

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