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XC mapping items needing verification (exciting 300/408, CRYSTAL LC-WPBE) #201

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@ndaelman-hu

Surfaced by the cross-code XC mapping audit (LibXC + code-output angles). These need a version/doc check before changing:

  • exciting code 300 — mapped to [GGA_C_BGCP, GGA_X_PBE], but code 300 appears to be acPBE (asymptotically-corrected PBE), and GGA_C_BGCP does not resolve in LibXC 7.0.0 (renamed GGA_C_ACGGA). Decide the correct components for exciting xctype=300.
  • exciting code 408 — mapped to HYB_GGA_XC_HSE03; current exciting may define 408 as HSE06. Verify against the targeted exciting release.
  • CRYSTAL LC-WPBE — mapped to HYB_GGA_XC_LRC_WPBE (Rohrdanz, id 473); the name usually denotes HYB_GGA_XC_LC_WPBE (Vydrov-Scuseria, id 478). Verify against CRYSTAL docs.

Confirmed audit fixes were applied in the XC parser branch; these three are deferred pending confirmation.

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