We show, by single-crystal diffraction studies in laser-heated diamond-anvil cells, that
Ca2CO4 orthocarbonate, which contains CO44− tetrahedra, can be formed already at~ 20 …

Abstract Knowledge of carbonate compounds under high pressure inside Earth is key to
understanding the internal structure of the Earth, the deep carbon cycle and major …

We have synthesized the orthocarbonate Sr2CO4, in which carbon is tetrahedrally
coordinated by four oxygen atoms, at moderately high pressures [20 (1) GPa] and high …

We have synthesized the orthocarbonate Sr3 [CO4] O in a laser-heated diamond anvil cell at
20 and 30 GPa by heating to≈ 3000 (300) K. Afterward, we recovered the orthocarbonate …

Orthocarbonates are a newly discovered class of compounds that are stable at high
pressures. The presence of sp3-hybridized carbon, having structural similarity to …

In this study, we present the results of a search for new stable structures of SrC 2 O 5 and
BaC 2 O 5 in the pressure range of 0–100 GPa based on the density functional theory and …

Over the past few years, the concept of carbonates, as the salts of MCO3 or composition with
[CO3] triangles in the crystal structures, was sufficiently extended. In addition to carbonates …

Carbonates are the major hosts of carbon on Earth's surface and their fate during subduction
needs to be known to understand the deep carbon cycle. Magnesite (MgCO 3) is thought to …

A novel structure of calcium orthocarbonate Ca 2 CO 4-Pnma has been discovered using ab-
initio crystal structure prediction methods (AIRSS and USPEX) based on the density …

The transition from structures with classical [CO3] triangles to structures with [CO4]
tetrahedra, corresponding to the transition from sp2 to sp3 hybridization of carbon atoms, is …