Crystallography of the pressure-induced structural phase transitions in K2Ca(CO3)2 and K2Ca2(CO3)3 carbonates

Author(s): Sofija Miloš, A. Romanenko, S. Rashchenko, A. Shatskiy, A. Likhacheva, R. Miletich
Abstract: Presence of K-rich carbonatitic melts in upper mantle and discovery of dense K-Ca carbonates as mineral inclusions in diamonds [1] demonstrated the rising importance of understanding the role of potassium within our planetary deep carbon cycle. Within the K₂CO₃-CaCO₃ system [2], there are two selected phases, i.e. K₂Ca(CO₃)₂ and K₂Ca₂(CO₃)₃ of which structural polymorphism was investigated under in-situ high-pressure conditions.
Organisation(s): Department of Mineralogy and Crystallography
External organisation(s): Siberian Branch of the Russian Academy of Sciences, Russian Academy of Sciences
Journal: Acta Crystallographica. Section A: Foundation and Advances
Volume: 2024
No. of pages: 1
ISSN: 0108-7673
DOI: https://doi.org/10.1107/s2053273324097511
Publication date: 08-2024
Peer reviewed: Yes
Austrian Fields of Science 2012: 105113 Crystallography, 105116 Mineralogy
Portal url: https://ucrisportal.univie.ac.at/en/publications/00bf2645-5a85-4612-babe-1b94e555e89f

Crystallography of the pressure-induced structural phase transitions in K<sub>2</sub>Ca(CO<sub>3</sub>)<sub>2</sub> and K<sub>2</sub>Ca<sub>2</sub>(CO<sub>3</sub>)<sub>3</sub> carbonates