T. N. Kovalskaya

Institute of Experimental Mineralogy

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ДА

Д. А. Варламов

Institute of Experimental Mineralogy

A. R. Kotelnikov

Institute of Experimental Mineralogy

G. Kalinin

Institute of Experimental Mineralogy

S. Z. Smirnov

Russian Academy of Sciences

Yu. B. Shapovalov

Institute of Experimental Mineralogy

V. Yu. Prokofiev

Institute of Geology of Ore Deposits Petrography Mineralogy and Geochemistry

ЕГ

Е.И. Герасимова

Siberian Federal University

НВ

Н. В. Чуканов

Institute of Problems of Chemical Physics

ВН

В. Н. Ермолаева

V.I. Vernadsky Institute of Geochemistry and Analytical Chemistry

Z. A. Kotelnikova

Institute of Geology of Ore Deposits Petrography Mineralogy and Geochemistry

Cooperative Institutions

Russian Academy of Sciences

Institute of Experimental Mineralogy

Institute of Geology of Ore Deposits Petrography Mineralogy and Geochemistry

Lomonosov Moscow State University

Institute of Problems of Chemical Physics

Novosibirsk State University

National Research Tomsk State University

V.I. Vernadsky Institute of Geochemistry and Analytical Chemistry

St Petersburg University

Institute of Oceanology. PP Shirshov Russian Academy of Sciences

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High-temperature aquamarine from vugless granite pegmatites of the Suprunovskoye deposit Irkutsk oblast, Russia

Геохимия (2019)

Е.И. Герасимова V. Yu. Prokofiev S. Z. Smirnov T. N. Kovalskaya

New data on the chemical composition were obtained for the aquamarine of the Suprunovskoye deposit: SiO2 66.10; Na2O 0.51; Al2O3 17.99; MgO 0.37; K2O 0.03; CaO 0.02; FeO 0.58; BeOcalc. 13.70 (wt%) and fluid and melt inclusions were investigated. Defined that aquamarine was formed in the late stages of granitic magmatism from a specific pegmatite silicate melt or water-silicate liquid enriched with water (>7 wt%), heavy REE (La/Yb = 0.48), lithium, but depleted in fluorine and boron at temperatures of about 700ºС and a pressure of about 6 kbar.

Pegmatite

Columbite

10.31857/s0016-7525647750-756

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Citations (1)

Hydrothermal synthesis of gallium epidote—analogue phases Ca2Al2Ga (Si3O12) (OH) from Tykotlova gold-sulfide occurence

Геохимия (2019)

T. N. Kovalskaya Д. А. Варламов A. R. Kotelnikov Н. В. Чуканов G. Kalinin

In order to reconstruct the crystallization conditions of the gallium epidote analogue Ca2Al2Ga(Si3O12)(OH) from the Tykotlova gold-sulphide ore occurrence in the Polar Urals, for the first time, a series of epidote-gallium epidote solid solutions were synthesized. The parameters of the unit cell were calculated for these phases, and IR and Raman spectra were obtained. It was concluded that gallium is predominantly in position M3, which allows us to consider the gallium epidote as an independent mineral specie. Stable Ga-containing aluminosilicate and silicate phases in the Ca-Ga-Al-Fe-Si-O system were obtained as by-products of the synthesis (analogs of the grossular-andradite garnet and calcium feldspar).

10.31857/s0016-752564101079-1090

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XVI Russian Symposium on Experimental Mineralogy

Geochemistry International (2011)

Yu. B. Shapovalov T. N. Kovalskaya

10.1134/s0016702911100065

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Experimental study of binary solid solutions in the system CaMgSi2O6–CaFeSi2O6–NaFeSi2O6 and Mg and Fe partition between Ca(Mg,Fe)Si2O6 and K(Mg,Fe)3(AlSi3O10)[OH]2

Russian Geology and Geophysics (2016)

A. R. Kotelnikov Andrey M. Kovalskii Н. И. Сук Z. A. Kotelnikova P. A. Petukhov

Diopside

Aegirine

Phlogopite

10.1016/j.rgg.2015.08.012

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Citations (1)

High-Temperature Beryl from Vugless Granite Pegmatites of the Suprunovskoye Deposit, Irkutsk Oblast, Russia

Geochemistry International (2019)

Е.И. Герасимова V. Yu. Prokofiev S. Z. Smirnov T. N. Kovalskaya

Pegmatite

Columbite

10.1134/s001670291907005x

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Citations (3)

Hydrothermal Synthesis of Galloepidote—Analogue of Phase Ca2Al2Ga(Si3O12)(OH) from the Tykotlova Gold–Sulfide Occurrence

Geochemistry International (2019)

T. N. Kovalskaya Д. А. Варламов A. R. Kotelnikov Н. В. Чуканов G. Kalinin

Grossular

Andradite

10.1134/s0016702919100069

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Experimental Study of Amphibolization of the Basic Rocks of the Tiksheozersky Massif

Springer mineralogy (2020)

T. N. Kovalskaya Д. А. Варламов Yu. B. Shapovalov G. Kalinin A. R. Kotelnikov

Massif

Amphibole

Diopside

10.1007/978-3-030-42859-4_14

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THE FORMATION OF K-RICH LAVAS OF VOLCANO VESUVIUS (ACCORDING TO THE PARAGENETIC ANALYSIS AND SOME EXPERIMENTAL DATA)

T. N. Kovalskaya

Source

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Synthesis of Fe-deficient eudialyte analogues: Relationships between the composition of the reaction system and crystal-chemical features of the products

Mineralogical Magazine (2023)

T. N. Kovalskaya В. Н. Ермолаева Nikita V. Chukanov Д. А. Варламов Georgy A. Kovalskiy

Abstract Eudialyte-related compounds have been synthesised hydrothermally at T = 600°C and P = 2 kbar from a stoichiometric mixture of Na 2 CO 3 , CaO, Fe 2 O 3 , ZrOCl 2 and SiO 2 using the Na:Ca:Fe:Zr:Si ratios corresponding to the eudialyte end-member Na 15 Ca 6 Fe 3 Zr 3 Si(Si 25 O 73 )(OH)Cl 2 ⋅H 2 O, in the presence of 1 M aqueous solutions of NaCl and NaF. The synthesis was carried out in platinum ampoules over 10 days. Natural raslakite (a Ca-deficient member of the eudialyte group) was used as a seed and added in amounts corresponding to 2 wt.% of the whole charge. The products were characterised by powder X-ray diffraction, IR and Raman spectroscopy, morphological features, and electron probe microanalyses. In experiments with NaCl, almost pure eudialyte-type compounds were obtained. Synthesis in the presence of a NaF solution resulted in the formation of a F-dominant eudialyte-type compound related to raslakite as the main product and aegirine, vlasovite and lalondeite as by-products. All synthesised eudialyte-type compounds are Zr-rich and Fe-deficient, similar to eudialyte-group minerals from hyperagpaitic rocks related to foyaites. The increased NaCl contents in the reaction system results in increased Ca content in the synthesised eudialyte-related compounds. The crystal-chemical formulae of the synthesised eudialyte-type compounds are derived based on general regularities established earlier for eudialyte-group minerals.

10.1180/mgm.2023.1

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Citations (4)