Table 3. Refined parameters for modeling of sample 2C.

R W	23.8%
Phase fraction, FeSb3	73.2%
a, FeSb3	9.219
Particle diameter, FeSb3	47 nm
y Sb, FeSb3	0.334
z Sb, FeSb3	0.158
U iso,Fe, FeSb3	0.0073 2
U iso,Sb, FeSb3	0.0100 2
Phase fraction, FeSb2	26.8%
a, FeSb2	5.836
b, FeSb2	6.572
c, FeSb2	3.221
Particle diameter, FeSb2	7.8 nm
x Sb, FeSb3	0.187
y Sb, FeSb3	0.357
z Sb, FeSb3	0.030
u iso,Fe, FeSb3	0.0086 2
u iso,Sb, FeSb3	0.0046 2