The double borates Ba{sub 3}Ln(BO{sub 3}){sub 3}, Ln = La-Lu, Y

Journal Article · Tue Jun 01 00:00:00 EDT 1999 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1006/jssc.1999.8163· OSTI ID:679216

Khamaganova, T N; Kuperman, N M; Bazarova, Z G ^[1]

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1. Russian Academy of Sciences, Ulan-Ude (Russian Federation). Lab. of Oxide Systems

New compounds of the compositions Ba{sub 3}Ln(BO{sub 3}){sub 3}, Ln = La-Lu, Y were obtained in the ternary systems BaO-Ln{sub 2}O{sub 3}-B{sub 2}O{sub 3}. Single crystals were grown for Ba{sub 3}Yb(BO{sub 3}){sub 3}. X-ray diffraction analysis showed a hexagonal structure with space group P6{sub 3}cm and lattice parameters a = 9.411(1), c = 17.481(5) {angstrom}, Z = 6. The compounds with Ln = Dy-Lu, Y also crystallize in the space group P6{sub 3}cm. New temperature data on melting points and unit-cell dimensions were obtained for each compound. The borates with Ln = La-Tb are isostructural and crystallize in the space group R{bar 3}. Optical second harmonic generation (SHG) measurements of laser radiation showed that Ba{sub 3}Yb(BO{sub 3}){sub 3} has type 1 phase transition. By investigation of the crystals of the double borate Ba{sub 3}Yb(BO{sub 3}){sub 3} it was established that the compound possesses a pyroelectric effect. 9 refs., 3 figs., 4 tabs.

• OSTI ID: 679216
• Journal Information: Journal of Solid State Chemistry, Journal Name: Journal of Solid State Chemistry Journal Issue: 1 Vol. 145; ISSN 0022-4596; ISSN JSSCBI
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BARIUM OXIDES
BORON OXIDES
CRYSTAL STRUCTURE
EXPERIMENTAL DATA
LATTICE PARAMETERS
MONOCRYSTALS
PYROELECTRIC EFFECT
RARE EARTH COMPOUNDS
X-RAY DIFFRACTION