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Structures and properties of layered barium borates Ba 0.975 [B 6 O 9 (OH)(O 0.975 Br 0.025 ) · B 2 O(OH) 3 ], Ba 2 [B 5 O 8 (OH) 2 ](OH), Na 2 Ba 2 [B 20 O 34 (OH) 4 ], and Ba 5 [B 20 O 33 (OH) 4 ]H 2 O

Structures and properties of layered barium borates Ba 0.975 [B 6 O 9 (OH)(O 0.975 Br 0.025 ) · B... Abstract A new hexaborate, Ba0.975[B6O9(OH)(O0.975Br0.025) · B2O(OH)3], was synthesized under hydrothermal conditions. This compound is structurally similar to tunnelite and the synthetic borates Pb[B6O10(OH) · B2O(OH)3], Pr[B6O10(OH) · B2O(OH)4], and Nd[B6O10 · B3O3(OH)4] · H2O studied earlier. In the new hexaborate and the refined pentaborate Ba2[B5O8(OH)2]OH, in which the polyanions adopt an orientation in layers unusual for pentaborates, thermal vibrations of the terminal groups were revealed. This fact reflects the real crystal structure. The nonlinear optical properties of the crystals of the polar pentaborate Na4Ba4[B20O34(OH)4] were determined. The crystal structure of the related pentaborate Ba5[B20O33(OH)4]H2O was considered. The factors most likely responsible for the difference in the second-harmonic generation signal for this pair were revealed. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Crystallography Reports Springer Journals

Structures and properties of layered barium borates Ba 0.975 [B 6 O 9 (OH)(O 0.975 Br 0.025 ) · B 2 O(OH) 3 ], Ba 2 [B 5 O 8 (OH) 2 ](OH), Na 2 Ba 2 [B 20 O 34 (OH) 4 ], and Ba 5 [B 20 O 33 (OH) 4 ]H 2 O

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References (9)

Publisher
Springer Journals
Copyright
2012 Pleiades Publishing, Ltd.
ISSN
1063-7745
eISSN
1562-689X
DOI
10.1134/s1063774511060034
Publisher site
See Article on Publisher Site

Abstract

Abstract A new hexaborate, Ba0.975[B6O9(OH)(O0.975Br0.025) · B2O(OH)3], was synthesized under hydrothermal conditions. This compound is structurally similar to tunnelite and the synthetic borates Pb[B6O10(OH) · B2O(OH)3], Pr[B6O10(OH) · B2O(OH)4], and Nd[B6O10 · B3O3(OH)4] · H2O studied earlier. In the new hexaborate and the refined pentaborate Ba2[B5O8(OH)2]OH, in which the polyanions adopt an orientation in layers unusual for pentaborates, thermal vibrations of the terminal groups were revealed. This fact reflects the real crystal structure. The nonlinear optical properties of the crystals of the polar pentaborate Na4Ba4[B20O34(OH)4] were determined. The crystal structure of the related pentaborate Ba5[B20O33(OH)4]H2O was considered. The factors most likely responsible for the difference in the second-harmonic generation signal for this pair were revealed.

Journal

Crystallography Reports – Springer Journals

Published: Jan 1, 2012

Keywords: Crystallography and Scattering Methods

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