The stills per-frame XtalOptimizer in IndexAndRefine used the struct-default
monoclinic angle bound [60,120] deg, which clamps a beta outside that window
(e.g. NmHR / 7O8F, C2 beta=131.78) to the boundary and corrupts the per-frame
cell. Both indexers already use [30,150] (FFBIDXIndexer, FFT settings); this
aligns the per-frame refine with them. Rotation path is unaffected
(refine_unit_cell is false there).
Verified on NmHR serial stills: FFBIDX with the correct C2 cell went from
0.01% to 9.10% indexed, recovering the true mC cell (beta~131.7) instead of a
clamped beta=120; 60k-image merge reaches 2.61 A at 99.8% completeness.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
leonarski_fandClaude Opus 4.8
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