Structural study of the rare-earth transition-metal intermetallic compound Nd sub 3 Ni sub 29 Si sub 4 B sub 10

The novel quaternary rare-earth transition-metal intermetallic compound Nd sub 3 Ni sub 29 Si sub 4 B sub 10 of space group P4 /nmm (No. 129) has been synthesised and its structure determined. The crystal structure has been investigated by scanning electron microscopy, x-ray and neutron powder diffr...

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Bibliographic Details
Published in:Journal of alloys and compounds 1998-08, Vol.278 (1-2), p.239-245
Main Authors: Zhang, H, Wu, E, Campbell, S J, Kennedy, S J, Li, H-S, Studer, A J, Bulcock, S R, Rae, A D
Format: Article
Language:English
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Summary:The novel quaternary rare-earth transition-metal intermetallic compound Nd sub 3 Ni sub 29 Si sub 4 B sub 10 of space group P4 /nmm (No. 129) has been synthesised and its structure determined. The crystal structure has been investigated by scanning electron microscopy, x-ray and neutron powder diffraction measurements. Rietveld refinements of the powder x-ray and neutron diffraction patterns reveal a tetragonal structure of lattice parameters a=b=11.2327(7) A, c=7.8754(3) A with two formula units of Nd sub 3 Ni sub 29 Si sub 4 B sub 10 per unit cell. The structure contains two rare-earth crystallographic sites of high symmetry, four B sites, seven transition metal sites and one Si site. The Ni atoms at the 2c 4 mm crystallographic site have a quasi-spherical polyhedral coordination.
ISSN:0925-8388