STRUCTURAL STUDY ON NEW ORDERED POTASSIUM-NICKEL FLUORIDE-TYPE OXIDES, STRONTIUM LANTHANUM MAGNESIUM MANGANESE OXIDE AND STRONTIUM LANTHANUM ZINC MANGANESE OXIDE

被引：5

作者：

BYEON, SH

KIM, IS

ITOH, M

NAKAMURA, T

机构：

[1] Research Laboratory of Engineering Materials, Tokyo Institute of Technology, Midori-ku, Yokohama, 227

来源：

MATERIALS RESEARCH BULLETIN | 1993年 / 28卷 / 06期

关键词：

MANGANESE; PEROVSKITE RELATED STRUCTURE; OXIDES;

D O I：

10.1016/0025-5408(93)90056-J

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The crystal structure of two new K2NiF4-type oxides, SrLaMg0.5Mn0.5O4 and SrLaZn0.5Mn0.5O4, have been determined with space group both I4/mmm and P422 using Rietveld refinement profile. An improvement in reliability factor on the basis of space group P422 suggested that they have ordered structure and unit cell parameters be a is-approximately-equal-to a0 square-root 2 = 5.4428(1) angstrom, c is-almost-equal-to c0 = 12.6084(2) angstrom for SrLaMg0.5Mn0.5O4 and a is-approximately-equal-to a0 square-root 2 = 5.4588(1) angstrom, c is-almost-equal-to c0 = 12.6247(3) angstrom for SrLaZn0.5Mn0.5O4. Comparing lengths of (Mn-O) bonds calculated with space group P422, the local symmetry of (MnO6) octahedron is strongly dependent on competing Mg and Zn ions in the perovskite-type plane.

引用

页码：597 / 603

页数：7

共 24 条

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BUSING WR, 1964, ORNLTM306 OAK RIDG N

[2]

BYEON SH, 1991, EUR J SOL STATE INOR, V28, P643

[3] INFLUENCE OF COMPETING BONDS ALONG THE C-AXIS ON THE LOCAL DISTORTION OF THE (COO6) OCTAHEDRON IN K2NIF4-TYPE OXIDES A'0.50LA1.50MG0.50CO0.50O4 (A' = CA, SR AND BA) [J].