Synthesis and Crystal Structure of (Sr1−xLa1+x)Zn1−xO3.5−x/2(0.01≤x<0.03)

• Published in: Journal of solid state chemistry Vol. 159; no. 1; pp. 19 - 25
• Main Authors: Yamane, Hisanori, Hara, Haruya, Kubota, Shun-ichi, Shimada, Masahiko, Yamaguchi, Yasuo
• Format: Journal Article
• Language: English
• Published: San Diego, CA Elsevier Inc 01.06.2001; Elsevier
• Subjects: (Sr1−xLa1+x)Zn1−xO3.5−x/2; Condensed matter: structure, mechanical and thermal properties; electron diffraction; Exact sciences and technology; Inorganic compounds; K2NiF4-type structure; local structure; neutron powder diffraction; Physics; Rietveld analysis; strontium lanthanum zinc oxide; Structure of solids and liquids; crystallography; Structure of specific crystalline solids; Water, oxides, hydroxides, peroxides; X-ray powder diffraction; ZnO4 tetrahedron; (Sr1−xLa1+x)Zn1−xO3.5−x/2; local structure; K2NiF4-type structure; X-ray powder diffraction; neutron powder diffraction; Rietveld analysis; ZnO4 tetrahedron; strontium lanthanum zinc oxide; electron diffraction; Oxides Mixed; Lanthanum oxides; Neutron diffraction; Electron diffraction; Transition element compounds; XRD; High temperature; Rare earth compounds; Experimental study; Strontium oxides; Local structure; Zinc oxides; Powder pattern; Solid solutions; Chemical preparation; Superstructure; Chemical composition; Crystal structure
• ISSN: 0022-4596; 1095-726X
• DOI: 10.1006/jssc.2001.9116

(Sr1−xLa1+x)Zn1−xO3.5−x/2 (0.01≤x<0.03), was prepared at 1373 K in the SrO–La2O3–ZnO system. The X-ray and neutron powder diffraction peaks were indexed with a body-centered tetragonal unit cell (a=3.75 and c=13.57 Å for the sample x=0.01). Weak diffuse superstructure reflections having periods of ∼2×a and ∼2×c were observed in electron diffraction patterns. The basic statistical structure of the superstructure was refined by Rietveld analysis for X-ray and neutron powder diffraction patterns of the sample x=0.01 with a model related to an oxygen-deficient K2NiF4-type structure, space group I4/mmm, Z=2, Rwp=0.1317, Rp=0.1052, RI=0.0566, and RF=0.0371 for X-ray data and Rwp=0.0796, Rp=0.0615, RI=0.0395, and RF=0.0252 for neutron data. In a local structure model, the Zn atom is coordinated by four oxygen atoms. Sr and La atoms are in the eightfold coordination of oxygen atoms.