Abstract
High resolution time-of-flight neutron powder diffraction has been performed on the intermetallic compound YNi10Si2 of the ThMn12 (space group I4/mmm) tetragonal structure at room temperature. Rietveld profile refinement of the powder pattern gave detailed structural parameters. The Si atoms are found to preferentially occupy the 8{cauchy integral} site with some small occupancies also for both the 8i and 8j sites. A minority impurity phase has been identified as that of the cubic NaZn13-type structure (space group Fm3c). This present neutron diffraction investigation of metalloid substitution on the three transition metal sublattices in this structure type, as well as previous neutron studies, confirm that both atomic size and enthalpy effects are important in determination of preferential site ordering.
| Original language | English |
|---|---|
| Pages (from-to) | 473-476 |
| Number of pages | 4 |
| Journal | Solid State Communications |
| Volume | 78 |
| Issue number | 5 |
| DOIs | |
| State | Published - May 1991 |
| Externally published | Yes |
Funding
A cknowledgements - The authors gratefully acknowledge the Science and Engineering Research Council for provision of neutron scattering facilities. O. Moze also acknowledges financial support of Istituto di Struttura della Materia del CNR, Frascati, Rome, Italy.