Crystal structure of the compounds RFe4Si2
(R = Dy, Tm)
Chem.
Met. Alloys 2
(2009) 211-214
https://doi.org/10.30970/cma2.0116
Oksana
BARDIN, Bohdana BELAN, Mykola MANYAKO,
Roman GLADYSHEVSKII
The crystal structures of the compounds RFe4Si2
(R = Dy, Tm) were determined from X-ray single-crystal (CAD-4T
diffractometer, Mo Kα radiation) and powder (HZG-4a
diffractometer, Fe Kα radiation) diffraction data. The
compounds crystallize with the ZrFe4Si2 structure type,
space group P42/mnm, Pearson symbol tP14; a
= 7.1691(8), c = 3.780(1) Å, RF = 0.0197, Rw = 0.0186
for DyFe4Si2 and a
= 7.1235(3), c = 3.7847(2) Å, RB =
0.0777 for TmFe4Si2. Both compounds are stoichiometric
with an ordered distribution of the atoms.
|
|
a |
b |
|
|
c |
d |
Projection of the unit cell of DyFe4Si2
along
[0 0 1] (a) and
coordination polyhedra of the atoms: [DySi6Fe12Dy2]
(b), [FeSi3Fe6Dy3]
(c), and [SiFe6Dy3] (d).
Keywords
Rare-earth metal / Iron / Ternary silicide /
Crystal structure