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Redetermination of Mg(2)B(25) based on single-crystal X-ray data.

Bindi L, Figini Albisetti A, Giunchi G, Malpezzi L, Masciocchi N - Acta Crystallogr Sect E Struct Rep Online (2012)

Bottom Line: Solid State Sci.8, 1202-1208] has been confirmed, although a much higher precision refinement was achieved, leading to much smaller standard uncertainties on bond lengths and refined occupancy factors.Mg(2)B(25) crystallizes in the β-boron structure type and is isostructural with other rhombohedral compounds of the boron-rich metal boride family.Magnesium atoms are found in inter-stitial sites on special positions (two with site symmetry .m, one with .2 and one with 3m), all with partial occupancies.

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ABSTRACT
The crystal structure of Mg(2)B(25), dimagnesium penta-eicosa-boride, was reexamined from single-crystal X-ray diffraction data. The structural model previously reported on the basis of powder X-ray diffraction data [Giunchi et al. (2006 ▶). Solid State Sci.8, 1202-1208] has been confirmed, although a much higher precision refinement was achieved, leading to much smaller standard uncertainties on bond lengths and refined occupancy factors. Moreover, all atoms were refined with anisotropic displacement parameters. Mg(2)B(25) crystallizes in the β-boron structure type and is isostructural with other rhombohedral compounds of the boron-rich metal boride family. Magnesium atoms are found in inter-stitial sites on special positions (two with site symmetry .m, one with .2 and one with 3m), all with partial occupancies.

No MeSH data available.


The crystal structure of Mg2B25 viewed down [010]. Anisotropic displacement parameters are drawn at the 90% probability level. Mg atoms are black, B atoms red.
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Fap1: The crystal structure of Mg2B25 viewed down [010]. Anisotropic displacement parameters are drawn at the 90% probability level. Mg atoms are black, B atoms red.


Redetermination of Mg(2)B(25) based on single-crystal X-ray data.

Bindi L, Figini Albisetti A, Giunchi G, Malpezzi L, Masciocchi N - Acta Crystallogr Sect E Struct Rep Online (2012)

The crystal structure of Mg2B25 viewed down [010]. Anisotropic displacement parameters are drawn at the 90% probability level. Mg atoms are black, B atoms red.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3379058&req=5

Fap1: The crystal structure of Mg2B25 viewed down [010]. Anisotropic displacement parameters are drawn at the 90% probability level. Mg atoms are black, B atoms red.
Bottom Line: Solid State Sci.8, 1202-1208] has been confirmed, although a much higher precision refinement was achieved, leading to much smaller standard uncertainties on bond lengths and refined occupancy factors.Mg(2)B(25) crystallizes in the β-boron structure type and is isostructural with other rhombohedral compounds of the boron-rich metal boride family.Magnesium atoms are found in inter-stitial sites on special positions (two with site symmetry .m, one with .2 and one with 3m), all with partial occupancies.

View Article: PubMed Central - HTML - PubMed

ABSTRACT
The crystal structure of Mg(2)B(25), dimagnesium penta-eicosa-boride, was reexamined from single-crystal X-ray diffraction data. The structural model previously reported on the basis of powder X-ray diffraction data [Giunchi et al. (2006 ▶). Solid State Sci.8, 1202-1208] has been confirmed, although a much higher precision refinement was achieved, leading to much smaller standard uncertainties on bond lengths and refined occupancy factors. Moreover, all atoms were refined with anisotropic displacement parameters. Mg(2)B(25) crystallizes in the β-boron structure type and is isostructural with other rhombohedral compounds of the boron-rich metal boride family. Magnesium atoms are found in inter-stitial sites on special positions (two with site symmetry .m, one with .2 and one with 3m), all with partial occupancies.

No MeSH data available.