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Atomically Defined Templates for Epitaxial Growth of Complex Oxide Thin Films
Published on: December 4, 2014
Sr₂₁Bi₈Cu₂(CO₃)₂O₄₁, a Bi⁵⁺ oxycarbonate with an original 10L structure
Sylvie Malo1, Artem M Abakumov, Marco Daturi
1Laboratoire CRISMAT and ‡Laboratoire LCS, ENSICAEN-UCBN , 6 Bld Maréchal Juin, 14050 Caen, France.
Abstract:
The layered structure of Sr21Bi8Cu2(CO3)2O41 (Z = 2) was determined by transmission electron microscopy, infrared spectroscopy, and powder X-ray diffraction refinement in space group P6₃/mcm (No. 194), with a = 10.0966(3)Å and c = 26.3762(5)Å. This original 10L-type structure is built from two structural blocks, namely, [Sr15Bi6Cu2(CO3)O29] and [Sr6Bi2(CO3)O12]. The Bi(5+) cations form [Bi2O10] dimers, whereas the Cu(2+) and C atoms occupy infinite tunnels running along c⃗. The nature of the different blocks and layers is discussed with regard to the existing hexagonal layered compounds. Sr21Bi8Cu2(CO3)2O41 is insulating and paramagnetic.
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