{'fraction_non_alphanumeric': 0.01646090534979424, 'fraction_numerical': 0.00411522633744856, 'mean_word_length': 5.697247706422019, '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}}
Some Properties of Europium β-diketone Chelates II Polarized Spectra and Ligand Field Symmetries

Single crystals of pyrrolidinium salts of europium tetrakis benzoyltrifluoroacetonate (HPyrr.)Eu(BTFA)4 are prepared and the polarized fluorescence and absorption spectra for each crystal axis are obtained. Electric dipole or magnetic dipole selection rules have been applied to these spectra and the ligand field symmetries which are consistent with the results of the polarized spectra are determined. When the crystals are grown from acetonitrile solutions, the crystal system is monoclinic and the ligand field symmetry is C2v, but when the crystals are grown from acetone solutions, these are orthorhombic and S4 respectively.