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add-single-crystal-tof-fit-verification-example.md

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190. Add a Single-Crystal TOF Fit Verification Example

Closed: added the single-crystal time-of-flight verification example docs/docs/verification/sc-neut-tof_taurine_basic.py (and generated .ipynb), built from a FullProf reference for Taurine (P 2₁/c, neutron TOF single-crystal data, SENJU @ J-PARC).

The FullProf model has extinction set to zero (Ext1 = 0, unrefined) so the comparison focuses on the structure-factor physics shared by cryspy and FullProf. After refining the overall scale only, edi-cryspy matches the FullProf F²cal to ~0.01% (profile diff and max deviation), with area ratio 1.0000 and shape correlation 1.0000.

Reference files live in docs/docs/verification/fullprof/sc-neut-tof_taurine_basic/; the example is listed under the Single Crystal section of docs/docs/verification/index.md and linked from the features page (§2.2 single-crystal Time-of-Flight row).