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Title: Infinitely adaptive transition-metal ordering in Ln2O2MSe2-type oxychalcogenides
Authors: Ainsworth, CM
Wang, CH
Johnston, HE
McCabe, EE
Tucker, MG
Brand, HEA
Evans, JSO
Keywords: Transition elements
Solid solutions
Issue Date: 30-Apr-2015
Publisher: American Chemical Society
Citation: Ainsworth, C. M., Wang, C. H., Johnston, H. E., McCabe, E. E., Tucker, M. G., Brand, H. E. A., & Evans, J. S. O. (2015). Infinitely adaptive transition-metal ordering in Ln2O2MSe2-type oxychalcogenides. Inorganic Chemistry, 54(15), 7230-7238. doi:10.1021/acs.inorgchem.5b00599
Abstract: A number of Ln2O2MSe2 (Ln = La and Ce; M = Fe, Zn, Mn, and Cd) compounds, built from alternating layers of fluorite-like [Ln2O2]2+ sheets and antifluorite-like [MSe2]2– sheets, have recently been reported in the literatures. The available MSe4/2 tetrahedral sites are half-occupied, and different compositions display different ordering patterns: [MSe2]2– layers contain MSe4/2 tetrahedra that are exclusively edge-sharing (stripe-like), exclusively corner-sharing (checkerboard-like), or mixtures of both. This paper reports 60 new compositions in this family. We reveal that the transition-metal arrangement can be systematically controlled by either Ln or M doping, leading to an “infinitely adaptive” structural family. We show how this is achieved in La2O2Fe1–xZnxSe2, La2O2Zn1–xMnxSe2, La2O2Mn1–xCdxSe2, Ce2O2Fe1–xZnxSe2, Ce2O2Zn1–xMnxSe2, Ce2O2Mn1–xCdxSe2, La2–yCeyO2FeSe2, La2–yCeyO2ZnSe2, La2–yCeyO2MnSe2, and La2–yCeyO2CdSe2 solid solutions. © 2015 American Chemical Society
Gov't Doc #: 8063
ISSN: 0020-1669
Appears in Collections:Journal Articles

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