TY - JOUR
T1 - Infinitely Adaptive Transition-Metal Ordering in Ln2O2MSe2-Type Oxychalcogenides
AU - Ainsworth, Chris M.
AU - Wang, Chun Hai
AU - Johnston, Hannah E.
AU - Mccabe, Emma E.
AU - Tucker, Matthew G.
AU - Brand, Helen E.A.
AU - Evans, John S.O.
N1 - Publisher Copyright:
© 2015 American Chemical Society.
PY - 2015/8/3
Y1 - 2015/8/3
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=84938388227&partnerID=8YFLogxK
U2 - 10.1021/acs.inorgchem.5b00599
DO - 10.1021/acs.inorgchem.5b00599
M3 - Article
AN - SCOPUS:84938388227
SN - 0020-1669
VL - 54
SP - 7230
EP - 7238
JO - Inorganic Chemistry
JF - Inorganic Chemistry
IS - 15
ER -