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 Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

Synchrotron-based high-pressure single-crystal X-ray diffraction experiments were conducted on synthetic pure clinoferrosilite, Fe 2 Si 2 O 6 , at room temperature to a maximum pressure of 45 GPa. In addition to the previously described  P 2 1 / c  →  C 2/ c  phase transition between 1.48 and 1.75 GPa ( Hugh-Jones et al. 1994 ), we observe further transition between 30 and 36 GPa into the high-pressure P2 1 /c phase (HP- P 2 1 / c ). The  C 2/ c  → HP- P 2 1 / c  transition is induced by rearrangement of half of the layers of corner-sharing SiO 4  tetrahedra into layers of edge-sharing SiO 6  octahedra. The new configuration of  VI Si layers suggests a possibility of a progressive transformation of the pyroxene into an ilmenite-type structure. The persistence of metastable pyroxene up to pressures higher than expected and its feasible direct transformation to ilmenite are of special interest for understanding the dynamics of cold-subducting slabs. We report on structural and compressibility features of both high-pressure phases as well as address thermal stability of HP- P 2 1 / c .

A new high-pressure phase transition in clinoferrosilite: In situ single-crystal X-ray diffraction study