Universität zu Köln

Efthimiopoulos, I., Mueller, J., Winkler, B., Otzen, C., Harms, M., Schade, U. and Koch-Mueller, M. (2019). Vibrational response of strontianite at high pressures and high temperatures and construction of P-T phase diagram. Phys. Chem. Miner., 46 (1). S. 27 - 36. NEW YORK: SPRINGER. ISSN 1432-2021

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Abstract

Our joint high-pressure and high-temperature mid-infrared absorbance and Raman investigations on a synthetic strontianite sample led to the construction of the respective pressure-temperature P-T phase diagram (maximum P = 38 GPa, maximum T = 800K). Our results allowed for the determination of the P-T slope for the onset pressure of the aragonite Pmcn -> post-aragonite Pmmn structural transition reported in the literature, which is found to be negative and equal to Delta P/Delta T = -0.012 GPa/K. The determined SrCO3P-T phase diagram appears consistent with the respective P-T phase diagrams of relevant aragonite-type carbonates. In addition, we provide the first ever measured far-infrared absorbance spectra under pressure for the family of aragonite-type carbonates. Our complementary first-principle calculations were able to reproduce the infrared spectra of both Pmcn and Pmmn phases of strontianite.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Efthimiopoulos, I. UNSPECIFIED UNSPECIFIED UNSPECIFIED Mueller, J. UNSPECIFIED UNSPECIFIED UNSPECIFIED Winkler, B. UNSPECIFIED UNSPECIFIED UNSPECIFIED Otzen, C. UNSPECIFIED UNSPECIFIED UNSPECIFIED Harms, M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Schade, U. UNSPECIFIED UNSPECIFIED UNSPECIFIED Koch-Mueller, M. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-139653
DOI:	10.1007/s00269-018-0984-8
Journal or Publication Title:	Phys. Chem. Miner.
Volume:	46
Number:	1
Page Range:	S. 27 - 36
Date:	2019
Publisher:	SPRINGER
Place of Publication:	NEW YORK
ISSN:	1432-2021
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language CARBONATE STABILITY; ARAGONITE; CACO3; TRANSITIONS; DOLOMITE; BEHAVIOR; CALCITE; SPECTROSCOPY; MAGNESITE; POLYMORPHS Multiple languages Materials Science, Multidisciplinary; Mineralogy Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/13965