A polar oxide ZnSnO3 with a LiNbO3-type structure
Yoshiyuki Inaguma1, Masashi Yoshida, Tetsuhiro Katsumata
1Department of Chemistry, Faculty of Science, Gakushuin University, 1-5-1 Mejiro, Toshima-ku, Tokyo 171-8588, Japan. yoshiyuki.inaguma@gakushuin.ac.jp
Journal of the American Chemical Society
|May 6, 2008
Summary
A novel polar oxide, zinc stannate (ZnSnO3), was synthesized under high pressure and temperature. This material exhibits a rhombohedral structure and shows potential for piezoelectric, pyroelectric, and nonlinear optical applications.
Area of Science:
- Materials Science
- Solid-State Chemistry
- Crystallography
Background:
- Polar oxides are crucial for advanced electronic and optical devices.
- Understanding the synthesis and structure of new polar materials is essential for technological development.
Purpose of the Study:
- To synthesize a polar oxide, zinc stannate (ZnSnO3).
- To determine the crystal structure of ZnSnO3.
- To evaluate its potential applications as a piezoelectric, pyroelectric, and nonlinear optical material.
Main Methods:
- Solid-state reaction under high pressure (7 GPa) and temperature (1000 °C).
- X-ray powder diffraction (XRD) for structural analysis.
- Rietveld refinement for precise determination of unit cell parameters and space group.
Main Results:
- Successfully synthesized ZnSnO3 with a polar, rhombohedral LiNbO3-type structure (space group R3c).
- Determined unit cell parameters: a = 0.52622(1) nm, c = 1.40026(2) nm.
- Observed significant Zn displacement within ZnO6 octahedra due to strong Zn-O bonding.
Conclusions:
- ZnSnO3 is a newly synthesized polar oxide with a well-defined crystal structure.
- The material's polar nature and structural characteristics make it a promising candidate for piezoelectric, pyroelectric, and nonlinear optical applications.
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