[HTML][HTML] Tracing the deep carbon cycle using metal stable isotopes: opportunities and challenges

SA Liu, SG Li - Engineering, 2019 - Elsevier
The subduction of marine carbonates and carbonated oceanic crust to the Earth's interior
and the return of recycled carbon to the surface via volcanism may play a pivotal role in …

Stability of iron-bearing carbonates in the deep Earth's interior

V Cerantola, E Bykova, I Kupenko, M Merlini… - Nature …, 2017 - nature.com
The presence of carbonates in inclusions in diamonds coming from depths exceeding 670
km are obvious evidence that carbonates exist in the Earth's lower mantle. However, their …

Sr[C2O5] is an Inorganic Pyrocarbonate Salt with [C2O5]2– Complex Anions

D Spahr, J König, L Bayarjargal… - Journal of the …, 2022 - ACS Publications
The synthesis of a novel type of carbonate, namely of the inorganic pyrocarbonate salt Sr
[C2O5], which contains isolated [C2O5] 2–-groups, significantly extends the crystal chemistry …

Synthesis of calcium orthocarbonate, Ca2CO4-Pnma at PT conditions of Earth's transition zone and lower mantle

J Binck, D Laniel, L Bayarjargal… - American …, 2022 - degruyter.com
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 …

Synthesis and Structure of Pb[C2O5]: An Inorganic Pyrocarbonate Salt

D Spahr, J König, L Bayarjargal… - Inorganic …, 2022 - ACS Publications
We have synthesized Pb [C2O5], an inorganic pyrocarbonate salt, in a laser-heated
diamond anvil cell (LH-DAC) at 30 GPa by heating a Pb [CO3]+ CO2 mixture to≈ 2000 …

Raman spectroscopy and x-ray diffraction of at lower mantle pressures

SS Lobanov, X Dong, NS Martirosyan, AI Samtsevich… - Physical Review B, 2017 - APS
The exceptional ability of carbon to form sp 2 and sp 3 bonding states leads to a great
structural and chemical diversity of carbon-bearing phases at nonambient conditions. Here …

Fate of carbonates in the Earth's mantle (10-136 GPa)

J Gao, X Wu, X Yuan, W Su - Frontiers in Earth Science, 2022 - frontiersin.org
Earth carbon cycle shapes the evolution of our planet and our habitats. As a key region of
carbon cycle, subduction zone acts as a sole channel transporting supracrustal carbonate …

Tetrahedrally Coordinated sp3-Hybridized Carbon in Sr2CO4 Orthocarbonate at Ambient Conditions

D Spahr, J Binck, L Bayarjargal, R Luchitskaia… - Inorganic …, 2021 - ACS Publications
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 …

Phase stabilities of and -II studied by Raman spectroscopy, x-ray diffraction, and density functional theory calculations

J Binck, L Bayarjargal, SS Lobanov, W Morgenroth… - Physical Review …, 2020 - APS
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 …

Orthocarbonates of Ca, Sr, and Ba—The Appearance of sp3-Hybridized Carbon at a Low Pressure of 5 GPa and Dynamic Stability at Ambient Pressure

PN Gavryushkin, DN Sagatova, N Sagatov… - ACS Earth and Space …, 2021 - ACS Publications
Orthocarbonates are a newly discovered class of compounds that are stable at high
pressures. The presence of sp3-hybridized carbon, having structural similarity to …