Ontology highlight
ABSTRACT:
SUBMITTER: Santamaria-Perez D
PROVIDER: S-EPMC6536543 | biostudies-literature | 2019 May
REPOSITORIES: biostudies-literature
Scientific reports 20190527 1
Calcium carbonate is a relevant constituent of the Earth's crust that is transferred into the deep Earth through the subduction process. Its chemical interaction with calcium-rich silicates at high temperatures give rise to the formation of mixed silicate-carbonate minerals, but the structural behavior of these phases under compression is not known. Here we report the existence of a dense polymorph of Ca<sub>5</sub>(Si<sub>2</sub>O<sub>7</sub>)(CO<sub>3</sub>)<sub>2</sub> tilleyite above 8 GPa. ...[more]