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

The influence of Mn content on the stability of the high-pressure CaCO 3  phases CaCO 3 -I, CaCO 3 - II, and CaCO 3 -III at 300 K has been investigated up to 40 mol% MnCO 3  using Raman spectroscopy recorded in situ with a diamond-anvil cell at pressures up to 14 GPa. Beyond about 5 mol% MnCO 3 , there is a progressive linear upward shift in the pressure of the CaCO 3 -I → CaCO 3 -II and CaCO 3 -II → CaCO 3 -III transitions, and expansion of the field of the CaCO 3 -II phase, with increase in MnCO 3  content. The shifts in transition pressure are 0.19 GPa/mol% for I → II and 0.26 GPa/mol% for II → III over the 5 to 40 mol% MnCO 3  composition interval, results fully consistent with elevation of transition pressure by the introduction of a smaller cation. However, minor and trace amounts of Mn appear to have a relatively insignificant influence on the pressure of these transitions.

Letter. High-pressure phase transitions in Ca-Mn carbonates (Ca,Mn)CO 3 studied by Raman spectroscopy