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Energy differences between frozen core and full core for MP4/aug-cc-pVTZ

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For Te2 (Tellurium diatomic)
  Energy (hartrees)
frozen core -151.6895436
correlated core -151.7404054
difference -0.0508618
  Energy (hartrees)
frozen core -151.6956825
correlated core -151.7455556
difference -0.0498731