The crystal structure of trigonal diboron trioxide

Gurr, G. E.; Montgomery, P. W.; Knutson, C. D.; Gorres, B. T.

doi:10.1107/s0567740870003369

Cited by 235 publications

(108 citation statements)

References 13 publications

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“…5,6]. However, other borate systems may behave differently, an example to illustrate this is the congruently melting boron oxide, B 2 O 3 : Crystals of B 2 O 3 consist of chains of corner-sharing [BO 3 ] triangles, linked to ribbons in the crystal structure [7]. For the corresponding glass and melt, however, the current model claims the predominant presence of [B 3 O 6 ] boroxol rings [8].…”

Section: Introductionmentioning

confidence: 85%

Thermal and optical properties of glasses of the system Bi₂O₃ – B₂O₃

Becker

2003

Cryst. Res. Technol.

107

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In the binary system Bi 2 O 3 -B 2 O 3 glasses were prepared in the composition range 57.5 mol% -80 mol% B 2 O 3 by defined slow cooling of large melt samples (about 75 cm 3 , each). Temperatures of crystallization, of melting and of glass transition were determined and density data of the glasses were derived using the hydrostatic weighting method. Thermal expansion coefficients and high precision refractive indices, together with their dispersion, were measured. The measured physical properties indicate subtle discontinuous structural changes of the glasses with glass composition, that match with the ranges of existence of the crystalline compounds of the binary system Bi 2 O 3 -B 2 O 3 . Thermal investigations together with X-ray powder diffraction analyses of crystallized glass samples prove the so far doubtful existence of a borate compound named "BiBO 3 " in the PDF within the composition range 52.5 -57.5 mol% B 2 O 3 .

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Section: Introductionmentioning

confidence: 85%

Thermal and optical properties of glasses of the system Bi₂O₃ – B₂O₃

Becker

2003

Cryst. Res. Technol.

107

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“…The adsorption energies of these processes are quite low, and thus all energetically favorable. We note here that the triplaner binding unit is an elemental framework in the B 2 crystal, 33 where the B-O bond length takes the same value of ϳ1.4 Å. The B atom on the top site binds only to the nearest O atom with the distance of 1.27 Å and the adsorption energy is still negative.…”

Section: B Adsorption On the "0001… O Surfacementioning

confidence: 99%

Energetics of Mg and B adsorption on polar zinc oxide surfaces from first principles

2008

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We have performed first-principles density-functional projector augmented-wave calculations to investigate the energetics of Mg and B adsorption on polar zinc oxide ͑ZnO͒ surfaces, thereby to understand the origin of the peculiar affinities between an epitaxial MgB 2 film and the ZnO substrate. We found that the ͑0001͒ Zn surface is relatively inert, while the ͑0001͒ O surface is very reactive in the adsorption of atomic species, where a triplaner BO 3 ͑a hump of MgO 3 ͒ binding unit is formed as a consequence of the B ͑Mg͒ atom adsorption on the surface. These binding units would be formed at an early stage in the epitaxial growth of MgB 2 film on the ZnO substrate, and subsequently lead to the formation of the reaction products that were recently found in the interface between the MgB 2 film and the ZnO substrate.

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“…5 chains" (connected BO 3 triangles) (8), and Elliott (9) recently concluded that a continuous random network (CRN) of planar BO 3 units, the vitreous analog, best fits the RDF. No evidence for boroxol rings was educed in that study.…”

Section: Introductionmentioning

confidence: 99%