ISSN:
0044-2313
Keywords:
Lithium indate(III)
;
α-Lithium ytterbate(III)
;
crystal structures
;
MAPLE
;
"split position"
;
Chemistry
;
Inorganic Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Description / Table of Contents:
Two Representatives of the α-LiFeO2 Type: LiInO2 and α-LiYbO2Single crystals of LiInO2 (well ground mixtures of ‘In2O’: KO2: Li2O = 1:1.8:1, Ag-tube, 22d, 520°C); and α-LiYbO2 (Yb2O3:Li2O = 1:1.1, Ni-tube, 30d, 1150°C) were prepared for the first time from mixtures of the binary oxides. The determination of the structure confirmed the α-LiFeO2 type. Both oxides crystallize in the space group I 41/amd (Z = 4); LiInO2: a = 431.2(1) pm c = 934.2(2) pm; c/a = 2.167; 123 Io(hkl), R = 3.6%, Rw = 2.9%. α-LiYbO2:a = 438.7(1) pm c = 1006.7(2) pm; c/a = 2.295, 130 Io(hkl), R = 4.4%, Rw = 3.6%. The Madelung part of lattice energy, MAPLE and characteristics of this kind of structure are discussed.
Notes:
LiInO2 (aus innigen Gemengen von binären Oxiden, ‘In2O’: KO2:Li2O = 1:1, 8:1, Ag-Bombe, 22d, 520°C); sowie α-LiYbO2 (aus den binären Oxiden Yb2O3:Li2O = 1:1,1, Ni-Bombe, 30d, 1150°C) wurden erstmals als Einkristalle dargestellt. Die Strukturverfeinerung bestätigt den α-LiFeO2 Typ. Beide Oxide kristallisieren in der Raumgruppe I 41/amd (Z = 4); LiInO2: a = 431,2(1) pm c = 934,2(2) pm; c/a = 2,167;123 Io(hkl), R = 3,6%, Rw = 2,9%.α-LiYbO2:a = 438,6(1) pm c = 1006,7(2) pm; c/a = 2,295; 130 Io(hkl), R = 4,4%, Rw = 3,6%. Der Madelunganteil der Gitterenergie, MAPLE und Besonderheiten dieses Strukturtyps werden diskutiert.
Additional Material:
12 Tab.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/zaac.19915980113
Permalink
