The Crystal Structure of KCuF_3
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概要
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The crystal structure of potassium trifluorocuprate (II) KCuF_3 has been determined by an X-ray analysis. The structure was refined by Fourier method. The crystals are tetragonal, a=√a_0 =5.855 and c=2c_0=7.852A ; space group D^18_4h -I4/mcm, with four formula units (KCuF_3) in the unit cell, where a_0 and c_0 designate the lattice constants of the fundamental pseudo-perovskite structure. This superstructure is due to a displacement of fluorine ions along the copper-fluorine-copper bonds only in the c plane. The atoms are in the following positios : 4 K^+ in (a) : (0, 0, 0 ; 1/2, 1/2, 1/2) + (0, 0, 1/4; 0, 0, 3/4) : 4Cu^2 + in (d) : (0, 0, 0; 1/2, 1/2, 1/2) + (0, 1/2, 0; 1/2, 0,0) : 4F-in (b) : (0, 0, 0; 1/2, 1/2, 1/2) + (0, 1/2, 1/4, 1/2, 0, 1/4) : 8F-in (h) : (0, 0, 0 ; 1/2, 1/2, 1/2) ± (x, 1/2 + x, 0; 1/2-x, x, 0) with x=0.228. In this structure a Cu^<2+> ion is surrounded by a distorted octahedron of F-ions with copper-fluorine distances of 2.25, 1.96 and 1.89 A.
- 社団法人日本物理学会の論文
- 1961-02-05
著者
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Okazaki Atsushi
Department Of Anesthesiology Juntendo University Shizuoka Hospital
-
Suemune Yasutaka
Department Of Physics Faculty Of Science Kyusyu University
-
Suemune Yasutaka
Department Of Physics Faculty Of Science Kyushu University
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Okazaki A.
Department of Physics, Faculty of Science, Kyusyu University
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