Structural and Mossbauer study of Sr2FeO3X (X = F, Cl, Br) and the magnetic structure of Sr2FeO3F

被引：51

作者：

Hector, AL

Hutchings, JA

Needs, RL

Thomas, MF

Weller, MT ^{[1
]}

机构：

[1] Univ Southampton, Dept Chem, Southampton SO17 1BJ, Hants, England

[2] Univ Liverpool, Dept Phys, Liverpool L69 7ZE, Merseyside, England

来源：

JOURNAL OF MATERIALS CHEMISTRY | 2001年 / 11卷 / 02期

关键词：

D O I：

10.1039/b008321f

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The structures of Sr2FeO3F, Sr2FeO3Cl and Sr2FeO3Br have been investigated using powder neutron diffraction (PND). All three ferrates crystallise in the primitive tetragonal space group P4/nmm and the anions are fully ordered giving iron oxygen square pyramids separated by rock salt type layers of strontium halide. Fe-57 Mossbauer data have been collected and confirm one iron(iii) site of distorted octahedral geometry in all three structures. Variable temperature PND data have been used to determine the root 2a x 2c magnetic superstructure of Sr2FeO3F.

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页码：527 / 532

页数：6

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共 27 条

[1] Ordered K2NIF4 structure of the solids La2Li1/2M1/2O4 (M(III) = Co, Ni, Cu) and the bonding properties of the MO6 polyhedra in various compounds of this type [J].

Abou-Warda, S ;

Pietzuch, W ;

Berghofer, G ;

Kesper, U ;

Massa, W ;

Reinen, D .

JOURNAL OF SOLID STATE CHEMISTRY, 1998, 138 (01) :18-31

[2] THE PREPARATION AND STRUCTURES OF THE ALKALINE-EARTH IRON OXYHALIDES [J].

ACKERMAN, JF .

JOURNAL OF SOLID STATE CHEMISTRY, 1991, 92 (02) :496-513

[3] SYNTHESIS AND SUPERCONDUCTING PROPERTIES OF THE STRONTIUM COPPER OXY-FLUORIDE SR2CUO2F2+DELTA [J].

ALMAMOURI, M ;

EDWARDS, PP ;

GREAVES, C ;

SLASKI, M .

NATURE, 1994, 369 (6479) :382-384

[4] POSSIBLE HIGH-TC SUPERCONDUCTIVITY IN THE BA-LA-CU-O SYSTEM [J].

BEDNORZ, JG ;

MULLER, KA .

ZEITSCHRIFT FUR PHYSIK B-CONDENSED MATTER, 1986, 64 (02) :189-193

[5] BOND-VALENCE PARAMETERS FOR SOLIDS [J].

BRESE, NE ;

OKEEFFE, M .

ACTA CRYSTALLOGRAPHICA SECTION B-STRUCTURAL SCIENCE, 1991, 47 :192-197

[6] BOND-VALENCE PARAMETERS OBTAINED FROM A SYSTEMATIC ANALYSIS OF THE INORGANIC CRYSTAL-STRUCTURE DATABASE [J].

BROWN, ID ;

ALTERMATT, D .

ACTA CRYSTALLOGRAPHICA SECTION B-STRUCTURAL SCIENCE, 1985, 41 (AUG) :244-247

[7]

Brown PJ, 1992, INT TABLES CRYSTALLO, VC

[8] Syntheses, powder neutron diffraction structures and Mossbauer studies of some complex iron oxyfluorides:: Sr3Fe2O6F0.87, Sr2FeO3F and Ba2InFeO5F0.68 [J].

Case, GS ;

Hector, AL ;

Levason, W ;

Needs, RL ;

Thomas, MF ;

Weller, MT .

JOURNAL OF MATERIALS CHEMISTRY, 1999, 9 (11) :2821-2827

[9] NEUTRON-DIFFRACTION STUDY OF MAGNETIC ORDERING IN CA2MNO4 [J].

COX, DE ;

SHIRANE, G ;

Birgeneau, RJ ;

MACCHESN, JB .

PHYSICAL REVIEW, 1969, 188 (02) :930-+

[10] STRUCTURE AND MAGNETIC-PROPERTIES OF SR2FEO4 AND SR3FE2O7 STUDIED BY POWDER NEUTRON-DIFFRACTION AND MOSSBAUER-SPECTROSCOPY [J].

DANN, SE ;

WELLER, MT ;

CURRIE, DB ;

THOMAS, MF ;

ALRAWWAS, AD .

JOURNAL OF MATERIALS CHEMISTRY, 1993, 3 (12) :1231-1237