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Keywords = hydrated titanosilicate precipitate

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10 pages, 2126 KiB  
Article
Hydrochloric Acidic Processing of Titanite Ore to Produce a Synthetic Analogue of Korobitsynite
by Lidia G. Gerasimova, Anatoly I. Nikolaev, Ekaterina S. Shchukina, Marina V. Maslova, Galina O. Kalashnikova, Gleb O. Samburov and Gregory Yu. Ivanyuk
Minerals 2019, 9(5), 315; https://doi.org/10.3390/min9050315 - 22 May 2019
Cited by 3 | Viewed by 3507
Abstract
The modal composition of (apatite)-nepheline-titanite ore and its geological setting within apatite deposits of the Khibiny Massif allow selective mining of titanite ore and its hydrochloric acidic processing. The reaction of titanite with concentrated hydrochloric acid produces hydrated titanosilicate precipitate (TSP) which, in [...] Read more.
The modal composition of (apatite)-nepheline-titanite ore and its geological setting within apatite deposits of the Khibiny Massif allow selective mining of titanite ore and its hydrochloric acidic processing. The reaction of titanite with concentrated hydrochloric acid produces hydrated titanosilicate precipitate (TSP) which, in turn, can be a precursor in titanosilicate synthesis. It is particularly noteworthy that a synthetic analogue of korobitsynite, Na5(Ti3Nb)[Si4O12]2O2(OH)2·7H2O, was synthesized by means of TSP alteration by alkaline hydrothermal solution at 200 °C within three days. The titanosilicate obtained this way has comparatively weak cation-exchange properties regarding Cs+ and Sr2+ cations and considerable photocatalytic activity occurring under visible light, which allows the use of a synthetic korobitsynite analogue (SKR) for production of self-cleaning, sterilizing, and anti-fouling building materials. Full article
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