HIGH-PRESSURE STRUCTURAL BEHAVIOUR OF SCOLECITE
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dc.contributor.author | Comodi P. | |
dc.contributor.author | Gatta G.D. | |
dc.contributor.author | Zanazzi P.F. | |
dc.date.accessioned | 2021-10-16T12:26:09Z | |
dc.date.available | 2021-10-16T12:26:09Z | |
dc.date.issued | 2002 | |
dc.identifier | https://elibrary.ru/item.asp?id=32125296 | |
dc.identifier.citation | European Journal of Mineralogy, 2002, 14, 3, 567-574 | |
dc.identifier.issn | 0935-1221 | |
dc.identifier.uri | https://repository.geologyscience.ru/handle/123456789/30746 | |
dc.description.abstract | The RP structural evolution of a natural scolecite from Iceland (space group Cc) was studied up to 5 GPa using in situ single-crystal X-ray diffraction data from a diamond-anvil cell (DAC) with silicon oil as non penetrating pressure transmitting medium. Linear regressions yielded mean axial compressibilities for a, b and c axes of beta(a) = 4.4(2)(.)10(-3), beta(b) = 6.1(2)(.)10(-3), beta(c) = 6.0(1)(.)10(-3) GPa(-1). K-0, refined with a second-order Birch-Murnaghan equation, fixing K-0' at 4, is 54.6(7) GPa. The bulk scolecite structure compression was the result of the "soft" behaviour of the channels (K congruent to 17 GPa for [100]-channels; K congruent to 50 GPa for [001]-channels) and the more rigid behaviour of the tetrahedral framework (K = 96 GPa), which underwent kinking of the Secondary Building Unit (SBU) along [100]-chains. The angle between the SBUs (phi), increased from 20.80(2)degrees at 0.0001 GPa, to 22.00(6)degrees at 3.38 GPa. Within the investigated pressure range, the position of the extra-framework cations and water molecules remained almost unchanged. Up to 4.2 GPa no phase transition was observed. | |
dc.title | HIGH-PRESSURE STRUCTURAL BEHAVIOUR OF SCOLECITE | |
dc.type | Статья |
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