Sr3[CO4]O Antiperovskite with Tetrahedrally Coordinated sp3-Hybridized Carbon and OSr6Octahedra

Dominik Spahr, Jannes König, Lkhamsuren Bayarjargal, Pavel N. Gavryushkin, Victor Milman, Hanns Peter Liermann, Björn Winkler

Результат исследования: Научные публикации в периодических изданияхстатьярецензирование

Аннотация

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 with [CO4]4- groups at ambient conditions. Single-crystal diffraction shows the presence of [CO4]4- groups, i.e., sp3-hybridized carbon tetrahedrally coordinated by covalently bound oxygen atoms. The [CO4]4- tetrahedra are located in a cage formed by corner-sharing OSr6 octahedra, i.e., octahedra with oxygen as a central ion, forming an antiperovskite-type structure. At high pressures, the octahedra are nearly ideal and slightly rotated. The high-pressure phase is tetragonal (I4/mcm). Upon pressure release, there is a phase transition with a symmetry lowering to an orthorhombic phase (Pnma), where the octahedra tilt and deform slightly.

Язык оригиналаанглийский
Страницы (с-по)14504-14508
Число страниц5
ЖурналInorganic Chemistry
Том60
Номер выпуска19
Ранняя дата в режиме онлайн14 сен 2021
DOI
СостояниеОпубликовано - 4 окт 2021

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  • 1.04 ХИМИЧЕСКИЕ НАУКИ

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