The distorted perovskite Sr(Na sub 1/4 Sb sub 3/4 )O sub 3 : A novel example of 1:3 B-cation ordering

Journal Article · Mon Jan 01 04:00:00 EST 1990 · Journal of Solid State Chemistry; (USA)

DOI:https://doi.org/10.1016/0022-4596(90)90180-6· OSTI ID:6623834

Alonso, J A; Mzayek, E; Rasines, I ^[1]

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1. Instituto de Ciencia de Materiales, Madrid (Spain)

Powder neutron diffraction data ({lambda} = 1.909 {angstrom}), have been used to refine the crystal structure of the ordered perovskite Sr(Na{sub 1/4}Sb{sub 3/4})O{sub 3} at 295 K. This compound is monoclinic, a = 8.0913(2), b = 8.0871(1), c = 8.0918(2) {angstrom}, {beta} = 89.953(1){degree}, with space group P2{sub 1}/n, Z = 8. R{sub p} = 4.27, R{sub wp} = 5.43, and R{sub z} = 3.44. The fairly distorted NaO{sub 6} and SbO{sub 6} octahedra, ordered in a 1:3 three-dimensional arrangement, are titled according to a system similar to that of the GdFeO{sub 3} 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 13 oxygens, in agreement with bond-valence calculations.

• OSTI ID: 6623834
• Journal Information: Journal of Solid State Chemistry; (USA), Journal Name: Journal of Solid State Chemistry; (USA) Vol. 84:1; ISSN JSSCB; ISSN 0022-4596
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400200 -- Inorganic
Organic
& Physical Chemistry
ALKALI METALS
ALKALINE EARTH METAL COMPOUNDS
ANTIMONY
CALCIUM COMPOUNDS
CALCIUM OXIDES
CALCULATION METHODS
CHALCOGENIDES
COHERENT SCATTERING
CRYSTAL STRUCTURE
DATA
DATA ANALYSIS
DIFFRACTION
ELEMENTS
EXPERIMENTAL DATA
INFORMATION
MEASURING INSTRUMENTS
MEASURING METHODS
METALS
MINERALS
NEUTRON DIFFRACTION
NUMERICAL DATA
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PEROVSKITE
PEROVSKITES
SCATTERING
SODIUM
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
TITANIUM COMPOUNDS
TITANIUM OXIDES
TRANSITION ELEMENT COMPOUNDS