qzhu2017 / XRD

X-ray diffraction calculations
MIT License
7 stars 6 forks source link

Discrepancy between XRD and .diff file #24

Closed qzhu2017 closed 4 years ago

qzhu2017 commented 4 years ago

@sayred1 I looked into the problem again. So the reason why the diff file from on-line validation set generates different PXRD intensity is because they take into account of anisotropic displacement.

 47 loop_
 48 _atom_site_label
 49 _atom_site_fract_x
 50 _atom_site_fract_y
 51 _atom_site_fract_z
 52 _atom_site_U_iso_or_equiv
 53 Pb   0.22046   0.25000   0.14651 ?
 54 O   0.00000   0.00000   0.25000   0.01165
 55 F   0.50000   0.00000   0.25000   0.02115
 56 Cl   0.22270   0.25000   0.50000   0.02216
 57 loop_
 58 _atom_site_aniso_label
 59 _atom_site_aniso_U_11
 60 _atom_site_aniso_U_22
 61 _atom_site_aniso_U_33
 62 _atom_site_aniso_U_12
 63 _atom_site_aniso_U_13
 64 _atom_site_aniso_U_23
 65 Pb 1.47629 1.32923 1.24297 0.05810 0.12724 0.12735

https://www.iucr.org/__data/iucr/cifdic_html/1/cif_core.dic/Iatom_site_aniso_label.html