COMPRESSIBILITY AND PHASE TRANSITIONS OF POTASSIUM CARBONATE AT PRESSURES BELOW 30 KBAR
P. N. Gavryushkin1,2, S. V. Rashenko1,2, A. F. Shatskiy1,2, K. D. Litasov1,2, A. I. Ancharov3
1Sobolev Institute of Geology and Mineralogy Siberian Branch Russian Academy of Sciences, Novosibirsk, 630090, Russia
2Novosibirsk State University, Novosibirsk, 630090, Russia
3Budker Institute of Nuclear Physics Siberian Branch Russian Academy of Sciences, Novosibirsk 630090, Russia
Keywords: KCO, высокие давления, кристаллохимия, сжимаемость, полиморфная модификация, аморфизация, high pressure, compressibility, phase transition, amorphization, powder diffraction, diamond anvil cell
Abstract
The compressibility of γ-K2CO3 within the pressure range of 0.001-23.3 kbar and room temperature was determined by in situ synchrotron powder diffraction measurements in diamond anvil cell. The modification of the diffraction pattern was fixed at P > 23.3 kbar. This modification can be explained by a reconstructive phase transition. The amorphization of the high pressure phase was fixed on decompression.
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