Thermoelastic Properties of K0.7Na0.3AlSi3O8 Hollandite and NaAlSi2O6 Jadeite: Implication for the Fate of the Subducted Continental Crust in the Deep Mantle
The thermoelastic properties of K0.7Na0.3AlSi3O8 hollandite and NaAlSi2O6 jadeite, synthesized from a (K, Na)-felspar (microcline), were investigated by a combination of in situ energy dispersive synchrotron X-ray radiation and multi-anvil techniques at high pressure (P) and temperature (T) up to 21 GPa and 1700 K. The second-order phase transformation was found to occur in hollandite at ~16 GPa from tetragonal I/4m (hollandite-I) to monoclinic I2/m (hollandite-II), which confirms the previous report that the incorporation of Na in the hollandite structure decreases the transformation pressure... Mehr ...
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Dokumenttyp: | Text |
Erscheinungsdatum: | 2020 |
Verlag/Hrsg.: |
Multidisciplinary Digital Publishing Institute
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Schlagwörter: | high pressure / thermal properties / in situ X-ray diffraction / liebermannite / jadeite / continental crust |
Sprache: | Englisch |
Permalink: | https://search.fid-benelux.de/Record/base-26714501 |
Datenquelle: | BASE; Originalkatalog |
Powered By: | BASE |
Link(s) : | https://doi.org/10.3390/min10030261 |