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67 changes: 66 additions & 1 deletion cif_pow.dic
Original file line number Diff line number Diff line change
Expand Up @@ -10426,7 +10426,7 @@ save_PD_PROC_LS
_definition.id PD_PROC_LS
_definition.scope Category
_definition.class Set
_definition.update 2014-06-20
_definition.update 2025-06-19
_description.text
;
This section is used to define parameters relevant to a
Expand All @@ -10445,6 +10445,69 @@ save_PD_PROC_LS
_name.object_id PD_PROC_LS
_category_key.name '_pd_proc_ls.diffractogram_id'

loop_
_description_example.case
_description_example.detail
;
_pd_diffractogram.id PATTERN_42

_pd_proc_ls.peak_cutoff 0.0001
_pd_proc_ls.prof_wr_expected 0.12324
_pd_proc_ls.prof_wr_factor 0.15432
_pd_proc_ls.profile_function 'Fundamental parameters'
;
;
The PD_PROC_LS information applies to the diffractogram with the id of
PATTERN_42. The peak intensities are calculated out to a point where
the intensity is 0.0001× the intensity at the peak maximum, or
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0.01%. The value of R~exp~ is 12.324% and R~wp~ is 15.432%. The peak
profiles were calculated using fundamental parameters
;
;
_pd_proc_ls.diffractogram_id cae4f697-ae84-4e3f-a0c1-4569d60b6191
_pd_proc_ls.peak_cutoff 0.005
_pd_proc_ls.prof_wr_expected 0.0273
_pd_proc_ls.prof_wr_factor 0.0569
_pd_proc_ls.profile_function
;
The profiles were calculated using the modified Thompson-Cox-Hastings
formulation, where:

tch_L = X * tan(\q)) + (Y / cos(\q)
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tch_G = (U * tan(\q)^2^ + V * tan(\q) + W + Z / cos(\q)^2^)^1/2^
tch_P = ( tch_G^5^ +
2.69269 * tch_G^4^ * tch_L +
2.42843 * tch_G^3^ * tch_L^2^ +
4.47163 * tch_G^2^ * tch_L^3^ +
0.07842 * tch_G * tch_L^4^ +
tch_L^5^ )^1/5^
tch_Q = tch_L / tch_P
eta = 1.36603 * tch_Q - 0.47719 * tch_Q^2^ + 0.1116 * tch_Q^3^

The full-width half-maximum of the Lorentzian and Gaussian peaks are
given by tch_L and tch_G, respectively.

The mixing parameter between the amount of Lorentzian and Gaussian is
given by eta.

U, W, Y, and Z were fixed at zero.

The refined values of V and X were 0.059(2)\% and 0.037(1)\%,
respectively.

For further details, see J. Appl. Cryst. (1987). 20, 79-83
https://doi.org/10.1107/S0021889887087090
;
;
;
The PD_PROC_LS information applies to the diffractogram with the id of
the given GUID. The peak intensities are calculated out to a point
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where the intensity is 0.005× the intensity at the peak maximum,
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or 0.5%. The value of R~exp~ is 2.73% and R~wp~ is 5.69%. The peak
profiles were calculated using the modified Thompson-Cox-Hasting
algorithm, as described, with final refined parameter values given.
;

save_

save_pd_proc_ls.background_function
Expand Down Expand Up @@ -12830,4 +12893,6 @@ save_
Updated descriptions of data items linked to _pd_data.point_id to
clarify that identical values refer to the same data point in each
disparate loop; they cannot be assigned values independently.

Added exmaples to PD_PROC_LS
;