data_global _chemical_name_mineral 'Pingguite' loop_ _publ_author_name 'Nenert G' 'Missen O P' 'Lian H' 'Weil M' 'Blake G R' 'Kampf A R' 'Mills S J' _journal_name_full 'Physics and Chemistry of Minerals' _journal_volume 47 _journal_year 2020 _journal_page_first _journal_page_last 53 _publ_section_title ; Crystal structure and thermal behavior of Bi6Te2O15: investigation of synthetic and natural pingguite ; _database_code_amcsd 0020926 _chemical_compound_source 'Synthetic' _chemical_formula_sum 'Bi6 Te2 O15' _cell_length_a 10.61155 _cell_length_b 22.74458 _cell_length_c 5.399038 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 90 _cell_volume 1303.086 _exptl_crystal_density_diffrn 8.915 _symmetry_space_group_name_H-M 'P n m a' loop_ _space_group_symop_operation_xyz 'x,y,z' 'x,1/2-y,z' '-x,1/2+y,-z' '1/2-x,1/2+y,1/2+z' '1/2+x,1/2-y,1/2-z' '1/2+x,y,1/2-z' '1/2-x,-y,1/2+z' '-x,-y,-z' loop_ _atom_site_label _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z Bi1 0.11570 0.62244 0.26700 Bi2 0.37950 0.00586 0.28270 Bi3 0.14030 0.25000 0.72460 Bi4 0.38980 0.25000 0.26920 Te 0.13030 0.12817 0.25080 O1 0.00400 0.16210 0.04100 O2 0.01400 0.07400 0.39000 O3 0.06100 0.53320 0.15300 O4 0.07700 0.18140 0.50500 O5 0.24800 0.18680 0.12100 O6 0.26000 0.09650 0.45500 O7 0.30500 0.57830 0.51000 O8 0.32800 0.25000 0.63900