Superstructure and Structural Variants in Sr2CuO2(CO3)

✍ Scribed by O. Milat; G. Van Tendeloo; S. Amelinckx; T.G.N. Babu; C. Greaves

• Publisher: Elsevier Science
• Year: 1994
• Tongue: English
• Weight: 978 KB
• Volume: 109
• Category: Article
• ISSN: 0022-4596
• DOI: 10.1006/jssc.1994.1063

✦ Synopsis

The structure of the compound (\mathrm{Sr}{2} \mathrm{CuO}{2}\left(\mathrm{CO}{3}\right)) has been reexamined by means of electron diffraction and high resolution electron microscopy. It was found that next to the body centered structure, a second variant of the structure, based on a primitive lattice, occurs. The two structural variants differ in the stacking mode of the (\mathrm{CO}{3}) layers. The actual crystal contains a mixture of these two stacking modes; the body centered one being predominant. A considerable degree of stacking disorder leading to streaked reflections is found mainly in the crystal parts based on the primitive lattice. Under electron irradiation the carbon-oxygen sublattice is found to disorder. 1994 Academic Press, Inc.