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In situ ambient and higherature Raman spectroscopic studies of nyerereite (Na,K)2Ca(CO3)2: Can hexagonal zemkorite be stable at earth-surface conditions? / Golovin, A.V.; Korsakov, A.V.; Zaitsev, A.N.

In: Journal of Raman Spectroscopy, No. 10, 2015, p. 904-912.

Research output: Contribution to journal › Article

Harvard

Golovin, AV, Korsakov, AV & Zaitsev, AN 2015, 'In situ ambient and higherature Raman spectroscopic studies of nyerereite (Na,K)2Ca(CO3)2: Can hexagonal zemkorite be stable at earth-surface conditions?', Journal of Raman Spectroscopy, no. 10, pp. 904-912. https://doi.org/10.1002/jrs.4756

APA

Golovin, A. V., Korsakov, A. V., & Zaitsev, A. N. (2015). In situ ambient and higherature Raman spectroscopic studies of nyerereite (Na,K)2Ca(CO3)2: Can hexagonal zemkorite be stable at earth-surface conditions? Journal of Raman Spectroscopy, (10), 904-912. https://doi.org/10.1002/jrs.4756

Vancouver

Golovin AV, Korsakov AV, Zaitsev AN. In situ ambient and higherature Raman spectroscopic studies of nyerereite (Na,K)2Ca(CO3)2: Can hexagonal zemkorite be stable at earth-surface conditions? Journal of Raman Spectroscopy. 2015;(10):904-912. https://doi.org/10.1002/jrs.4756

Author

Golovin, A.V. ; Korsakov, A.V. ; Zaitsev, A.N. / In situ ambient and higherature Raman spectroscopic studies of nyerereite (Na,K)2Ca(CO3)2: Can hexagonal zemkorite be stable at earth-surface conditions?. In: Journal of Raman Spectroscopy. 2015 ; No. 10. pp. 904-912.

BibTeX

@article{458a7772a1174b00b51b36a4d72d45bd,
title = "In situ ambient and higherature Raman spectroscopic studies of nyerereite (Na,K)2Ca(CO3)2: Can hexagonal zemkorite be stable at earth-surface conditions?",
abstract = "Copyright {\textcopyright} 2015 John Wiley & Sons, Ltd.In this study we present Raman spectroscopy data obtained from a naturally occurring orthorhombic nyerereite (Na,K)2Ca(CO3)2from the Oldoinyo Lengai volcano (Tanzania) at ambient and high temperature. Nyerereite was heated up to 300C, 400C and 500C, and is believed to have been transformed at high temperatures to hexagonal β- and γ-phases similar to zemkorite, (Na,K)2Ca(CO3)2. There are no major differences in the chemical composition of natural nyerereite and zemkorite. However, Raman spectra reveal significant differences between the nyerereite at ambient temperature and the phases obtained in the course of all our higherature experiments. In situ measurements show that none of the higherature hexagonal phases are quenchable, even at very high cooling rates (up to 50-80C/min), and they transform to nyerereite at ambient temperature. Contrary to previous studies even the presence of high K2O (up to 7.5wt.%) did not stabilize the hexagonal structure during cooling. The",
author = "A.V. Golovin and A.V. Korsakov and A.N. Zaitsev",
year = "2015",
doi = "10.1002/jrs.4756",
language = "English",
pages = "904--912",
journal = "Journal of Raman Spectroscopy",
issn = "0377-0486",
publisher = "Wiley-Blackwell",
number = "10",

}

RIS

TY - JOUR

T1 - In situ ambient and higherature Raman spectroscopic studies of nyerereite (Na,K)2Ca(CO3)2: Can hexagonal zemkorite be stable at earth-surface conditions?

AU - Golovin, A.V.

AU - Korsakov, A.V.

AU - Zaitsev, A.N.

PY - 2015

Y1 - 2015

N2 - Copyright © 2015 John Wiley & Sons, Ltd.In this study we present Raman spectroscopy data obtained from a naturally occurring orthorhombic nyerereite (Na,K)2Ca(CO3)2from the Oldoinyo Lengai volcano (Tanzania) at ambient and high temperature. Nyerereite was heated up to 300C, 400C and 500C, and is believed to have been transformed at high temperatures to hexagonal β- and γ-phases similar to zemkorite, (Na,K)2Ca(CO3)2. There are no major differences in the chemical composition of natural nyerereite and zemkorite. However, Raman spectra reveal significant differences between the nyerereite at ambient temperature and the phases obtained in the course of all our higherature experiments. In situ measurements show that none of the higherature hexagonal phases are quenchable, even at very high cooling rates (up to 50-80C/min), and they transform to nyerereite at ambient temperature. Contrary to previous studies even the presence of high K2O (up to 7.5wt.%) did not stabilize the hexagonal structure during cooling. The

AB - Copyright © 2015 John Wiley & Sons, Ltd.In this study we present Raman spectroscopy data obtained from a naturally occurring orthorhombic nyerereite (Na,K)2Ca(CO3)2from the Oldoinyo Lengai volcano (Tanzania) at ambient and high temperature. Nyerereite was heated up to 300C, 400C and 500C, and is believed to have been transformed at high temperatures to hexagonal β- and γ-phases similar to zemkorite, (Na,K)2Ca(CO3)2. There are no major differences in the chemical composition of natural nyerereite and zemkorite. However, Raman spectra reveal significant differences between the nyerereite at ambient temperature and the phases obtained in the course of all our higherature experiments. In situ measurements show that none of the higherature hexagonal phases are quenchable, even at very high cooling rates (up to 50-80C/min), and they transform to nyerereite at ambient temperature. Contrary to previous studies even the presence of high K2O (up to 7.5wt.%) did not stabilize the hexagonal structure during cooling. The

U2 - 10.1002/jrs.4756

DO - 10.1002/jrs.4756

M3 - Article

SP - 904

EP - 912

JO - Journal of Raman Spectroscopy

JF - Journal of Raman Spectroscopy

SN - 0377-0486

IS - 10

ER -

ID: 4003569