English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

High-pressure and high-temperature phase relations of FeTiO 3  were investigated up to a pressure of about 74 GPa and 2600 K by synchrotron X-ray diffraction and analytical transmission electron microscopy. We conclude that FeTiO 3  ilmenite transforms into the following phase(s) with increasing pressure: FeTiO 3  (perovskite) at 20-30 GPa, Fe 2 TiO 4  (Ca 2 TiO 4 -type) + TiO 2  (OI-type) at 30-44 GPa and high temperature, FeO (wüstite) + TiO 2  (OI) at 30-44 GPa and low temperature, and wüstite + FeTi 3 O 7  (orthorhombic phase) above 44 GPa. Among these dense high-pressure polymorphs, FeTi 3 O 7  is a new compound and its structure analysis was tried using particle swarm optimization simulation. This method successfully found a new high-density FeTi 3 O 7  structure, and Rietveld refinement based on this model structure gave an excellent fit with the experimentally obtained X-ray diffraction pattern. This new high-density FeTi 3 O 7  structure consists of polyhedra for monocapped FeO 7  prisms, bicapped TiO 8  prisms, and tricapped TiO 9  prisms, which develop on the b-c plane and stack along the a axis. The dense compound assemblage found in FeTiO 3  is promising for investigating the behavior of ABX 3  compounds under ultrahigh pressures.

High-pressure and high-temperature phase transitions in FeTiO 3 and a new dense FeTi 3 O 7 structure