{'fraction_non_alphanumeric': 0.019966722129783693, 'fraction_numerical': 0.0016638935108153079, 'mean_word_length': 5.764044943820225, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Zone-center phonon frequencies for graphite and graphite intercalation compounds: Charge-transfer and intercalate-coupling effects.

The frequencies of several zone-center vibrational modes in graphite have been calculated from first principles, with results in very good agreement with experiment. By studying the effect of charge transfer and lattice-constant change on E2g mode frequencies, we find that the systematic stage dependences of both Ramanand infrared-active modes in graphite intercalation compounds can be understood by introducing a coupling to the intercalate of unconventional form.