Structure refinements of the
compounds Pr5Si3 and Zr3Si2
Chem.
Met. Alloys 7 (2014) 56-62
https://doi.org/10.30970/cma7.0278
Marina BOYKO, Nataliya MUTS, Ihor MUTS, Roman GLADYSHEVSKII
The structures of the compounds Pr5Si3
and Zr3Si2 were refined on X-ray single-crystal
diffraction data. Pr5Si3 crystallizes with the tetragonal
structure type Cr5B3: space group I4/mcm, Pearson symbol tI32, a = 0.7820(1), c = 1.3812(3) nm,
Z = 4,
R1 = 0.035,
wR2 = 0.080
for 287 unique reflections, 16 refined parameters. Zr3Si2
crystallizes with the tetragonal structure type U3Si2:
Pearson symbol tP10, space group P4/mbm,
a = 0.7087(1),
c = 0.37060(7) nm,
Z = 2,
R1 = 0.022,
wR2 = 0.042
for 114 unique reflections, 12 refined parameters.
Selected interatomic distances
for the site Pr2 in Pr5Si3 (the
displacement ellipsoids of the atoms are shown with 99 % probability
level)
Keywords
Praseodymium / Zirconium / Silicide
/ Arc-melting /
High-frequency furnace / Crystal structure / X-ray diffraction