 | | Journal (article/letter/editorial) | | Experimental studies of Ta2O5 and columbite–tantalite solubility in fluoride solutions from 300 to 550°C...Experimental studies of Ta2O5 and columbite–tantalite (Mn,Fe)(Nb,Ta)2O6 solubility were carried out in...high (10−3–10−2 m). The dependence of columbite–tantalite (Nb2O5-59 wt. %, Ta2O5-18 wt. %) solubility as...Academy of Sciences, Chernogolovka, Moscow Oblast, Russia e-mail: zaraisky@iem.ac.ru V. Korzhinskaya e-mail:...In NaHCO3, Na2CO3, and HCl solutions columbite–tantalite solubility is low. Even in 1 m chloride solutions |  | | Journal (article/letter/editorial) | | attributed to the crystallization of columbite–tantalite [(Mn2?, Fe2?) (Ta, Nb)2O6] (Linnen and Keppler...responsible for early saturation of columbite–tantalite in pegmatites. The purpose of this paper is to... 150 nk 250 Sn (Yin et al. 1995) Orlovka, Russia Ta-granite 140 nk 150 200 1.3 100 Ma—millions...primary ore mineral in Ta deposits is columbite– tantalite (Linnen et al. 2012). A number of studies 123...the lower solubility of columbite relative to tantalite might be the driving force behind fractionation |  | | Journal (issue) | | concentration in rare-element granites and pegmatites from Russia………………………………………………………………..4 BARROS, R., MENUGE..., RODA-ROBLES, E., VILLASECA, C., SIMMONS, W. Fe-Mn-(Mg) distribution in primary phosphates and silicates...the South Sangilen pegmatite belt, Tyva Republic, Russia…………………………………………………………………………………..68 LIMA, A., DIAS... USA………………………………………………………………………………129 SIRBESCU, MN., C. Comparative fluid chemistry of internaylly-zoned...Products of Ca-metasomatism of Sc-enriched columbite-(Mn) from NYF pegmatite Kožichovice II, Czech Republic |  | | Book | | Academy of Sciences Chernogolovka, Moscow Oblast, Russia Oleg Safonov Metamorphism Laboratory DS Korzhinskii...Academy of Sciences Chernogolovka, Moscow Oblast, Russia ISSN 2366-1585 ISSN 2366-1593 (electronic) Springer...mineralogy, petrology and geochemistry. Chernogolovka, Russia Oleg Safonov Yuriy Litvin Contents Part I 1...Influence of Silicate Substance on Pyrochlore and Tantalite Solubility in Fluoride Aqueous Solutions (Experimental...Fe, Mn)8O16 Pyrope Mg3Al2Si3O12 Quartz SiO2 Ringwoodite Mg2SiO4 Serpentine (Mg, Fe, Ni, Al, Zn, Mn)2–3Si2O5(OH)4 |  | | Journal (volume) | | (Czech Republic) (Romania/USA) (Germany) (Hungary) (Russia) (Czech Republic) (Japan) (Germany) Publication...this was nicely shown for the case of oxidation of Mn(II) by bacteria [5]. Due to the rather low absorption...significant adsorption of heavy metals such as Pb, As, Mn, and Fe, and loss of alkali and alkali earth metals...Inst. of Silicate Chemistry RAS, St. Petersburg, Russia (*rimma_bubnova@mail.ru) 2 Dept. of Crystallography...St. Petersburg State University, St. Petersburg, Russia 1 Nowadays borates are well known as advanced |
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