learntopas
Hi,
I have two questions about atomic displacement parameters.
1. What is typical Beq range? Is it around 0.1-15? For Uiso, it is less than 0.2, and I used U = B / 8pi^2 to convert. I dont know if I can convert like this.
2. Do you usually refine Beq with standard XRD powder pattern?
Thanks for your time.
rowlesmr
For inorganics, I usually see beqs between 0.2 and 1. Organics up to ~10. I use U = B / 8pi^2 to convert, so we're the same on that.
Depending on resolution, peaks hieghts, angular range, you can refine beqs. But be careful, and check then against single crystal values.
Matthew