THE DISTORTED PEROVSKITE SR(NA1/4SB3/4)O3 - A NOVEL EXAMPLE OF 1-3 B-CATION ORDERING

被引：17

作者：

ALONSO, JA ^{[1
]}

MZAYEK, E ^{[1
]}

RASINES, I ^{[1
]}

机构：

[1] CSIC,INST CIENCIA MAT,SERRANO 113,E-28006 MADRID,SPAIN

来源：

JOURNAL OF SOLID STATE CHEMISTRY | 1990年 / 84卷 / 01期

关键词：

D O I：

10.1016/0022-4596(90)90180-6

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Powder neutron diffraction data (λ = 1.909 Å), have been used to refine the crystal structure of the ordered perovskite Sr(Na 1 4Sb 3 4)O3 at 295 K. This compound is monoclinic, a = 8.0913(2), b = 8.0871(1), c = 8.0918(2) Å, β = 89.953(1)°, with space group P21 n, Z = 8. Rp = 4.27, Rwp = 5.43, and Rz = 3.44. The fairly distorted NaO6 and SbO6 octahedra, ordered in a 1:3 three-dimensional arrangement, are tilted according to a system similar to that of the GdFeO3 structure. The tilting angles for the four kinds of octahedra have been obtained from the atomic positional parameters. Sr atoms are in strongly asymmetrical environments, coordinated to 12 oxygens, in agreement with bond-valence calculations. © 1990.

引用

页码：16 / 22

页数：7

共 20 条

[1] A NEW KIND OF B-CATIONS 1-3 ORDERING IN CUBIC PEROVSKITES - THE OXIDES BA(M0.25SB0.75)O3 (M LI, NA) [J].

ALONSO, JA ;

MZAYEK, E ;

RASINES, I .

MATERIALS RESEARCH BULLETIN, 1987, 22 (01) :69-74

[2] THE CRYSTAL AND MAGNETIC-STRUCTURES OF SR2LURUO6, BA2YRUO6, AND BA2LURUO6 [J].

BATTLE, PD ;

JONES, CW .

JOURNAL OF SOLID STATE CHEMISTRY, 1989, 78 (01) :108-116

[3] The crystal and magnetic structures of Ca2YRuO6 and the electronic properties of the series M2+2X3+Ru5+O6 (M = Ca, Sr, Ba; X = La, Y) [J].

BATTLE, PD ;

MACKLIN, WJ .

JOURNAL OF SOLID STATE CHEMISTRY, 1984, 54 (02) :245-250

[4]

BATTLE PD, 1974, MATER RES B, V9, P1041

[5] 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

[6] DETERMINATION OF CRYSTAL STRUCTURE OF YTTRIUM ORTHOFERRITE AND REFINEMENT OF GADOLINIUM ORTHOFERRITE [J].

COPPENS, P ;

EIBSCHUTZ, M .

ACTA CRYSTALLOGRAPHICA, 1965, 19 :524-+

[7]

DUIVENBODEN HC, 1986, ACTA CRYSTALLOGR C, V42, P523

[8] STRUPLO84, A FORTRAN PLOT PROGRAM FOR CRYSTAL-STRUCTURE ILLUSTRATIONS IN POLYHEDRAL REPRESENTATION [J].

FISCHER, RX .

JOURNAL OF APPLIED CRYSTALLOGRAPHY, 1985, 18 (AUG) :258-262

[9] CLASSIFICATION OF TILTED OCTAHEDRA IN PEROVSKITES [J].

GLAZER, AM .

ACTA CRYSTALLOGRAPHICA SECTION B-STRUCTURAL SCIENCE, 1972, B 28 (NOV15) :3384-&

[10] DINEODYMIUM MAGNESIUM TITANATE(IV) - A RIETVELD REFINEMENT OF NEUTRON POWDER DIFFRACTION DATA [J].

GROEN, WA ;

VANBERKEL, FPF ;

IJDO, DJW .

ACTA CRYSTALLOGRAPHICA SECTION C-CRYSTAL STRUCTURE COMMUNICATIONS, 1986, 42 :1472-1475

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