Structural transformations of minerals in deep geospheres: A review

D. Yu Pushcharovsky, A. R. Oganov

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)

Abstract

The structure and composition of inner geospheres are considered in light of new data on the structural transformations of minerals under high pressure. More than 100 tetrahedral complexes in silicates of the Earth's crust give way to no more than 20 structural types of minerals of this class in the Earth's mantle. The main difference in their structures is associated with the transformation of Si tetrahedra into Si octahedra. New data on the structural transformations of minerals in deep geospheres indicate that the mineralogical diversity of the Earth's crust is substantially richer than that of deep geospheres; however, mantle mineralogy is not as primitive as was supposed even twenty or thirty years ago. The results of recent seismological investigations and quantum-mechanical calculations allow the assumption that there exists a new previously unknown phase transformation under the conditions in the Earth's inner core.

Original languageEnglish
Pages (from-to)767-777
Number of pages11
JournalCrystallography Reports
Volume51
Issue number5
DOIs
Publication statusPublished - Oct 2006
Externally publishedYes

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