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 Tools annual

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 monthly

Global: Zendy Plus monthly

Presents the access of premium content as premium feature

Premium Content

Global: Zendy Plus annual

Global: Zendy Free Plan

A set of powder diffraction data was collected for synthetic titanite (CaTiOSiO 4 ) at simultaneously high pressures and high temperatures in a P-T field between 275 K to 650 K and room pressure to 4.9 GPa, respectively. With these data it was possible to relate the A2/a high-pressure phase at &gt;3.5 GPa (room temperature) to the A2/a high temperature phase observed above 825 K (room pressure). The slope of the phase transition is -180 K/GPa. The data also allowed the extraction of P-V-T equations of state with the following parameters: for P2 1 /a: K 298,0  = 113.4(3), (∂K T,0 / ∂T) P  = -0.061(3) GPa/K, V 298,0  = 369.04(2) Å 3 , α 0  = 2.07(5)/10 5  K. For A2/a: K 298,0  = 135.2(2), (∂K T,0 / ∂T) P  = -0.073(1) GPa/K, V 298,0  = 367.12(2) Å 3 , α 0  = 2.8(2) / 10 5  K, where K is bulk modulus, V is volume, and α is thermal expansivity. A structural analysis based on Rietveld refinements revealed that the polymerized CaO 7  polyhedra dominantly affect the structural response to changing pressure and temperature. The TiO 6  octahedra rotate almost rigidly in response to the compression of the CaO 7  polyhedra with which they share edges. The SiO 4  tetrahedra show a strong angular distortion with only little change in bond lengths.

In situ powder diffraction study of titanite (CaTiOSiO 4 ) at high pressure and high temperature