Single-crystal diffraction at the high-pressure Indo-Italian beamline Xpress at Elettra, Trieste

Lotti, P.; Milani, S.; Merlini, M.; Joseph, B.; Alabarse, F.; Lausi, A.

doi:10.1107/S1600577519015170

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Figure 2
Structure of calcite and its high-pressure polymorphs. (a) CaCO₃ stable up to 1.5 GPa (space group $[R\bar3c]$ ). (b) CaCO₃-II (P2₁/c), stable up to 2.1 GPa, is a subgroup of calcite space group ( $[R\bar3c]$ ). (c) CaCO₃-III ( $[P\bar1]$ ) polymorph. Ca cations are represented by green spheres, while the CO₃ planar groups are in orange.

JOURNAL OF
SYNCHROTRON
RADIATION

ISSN: 1600-5775

Volume 27| Part 1| January 2020| Pages 222-229

https://doi.org/10.1107/S1600577519015170

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