data_global _chemical_name_mineral 'Parisite-(Ce)' loop_ _publ_author_name 'Donnay G' 'Donnay J D H' _journal_name_full 'American Mineralogist' _journal_volume 38 _journal_year 1953 _journal_page_first 932 _journal_page_last 963 _publ_section_title ; The crystallography of bastnaesite, parasite, roentgenite, and synchisite ; _database_code_amcsd 0000060 _chemical_formula_sum 'Ce2 Ca C O3 F2' _cell_length_a 7.12 _cell_length_b 7.12 _cell_length_c 84.1 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 120 _cell_volume 3692.211 _exptl_crystal_density_diffrn 3.386 _symmetry_space_group_name_H-M 'R 3' loop_ _space_group_symop_operation_xyz 'x,y,z' '2/3+x,1/3+y,1/3+z' '1/3+x,2/3+y,2/3+z' '-y,x-y,z' '2/3-y,1/3+x-y,1/3+z' '1/3-y,2/3+x-y,2/3+z' '-x+y,-x,z' '2/3-x+y,1/3-x,1/3+z' '1/3-x+y,2/3-x,2/3+z' loop_ _atom_site_label _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z Ce1 0.33333 0.00000 0.00000 Ce2 0.33333 0.00000 0.10800 Ce3 0.33333 0.00000 0.16700 Ce4 0.33333 0.00000 0.27500 Ca1 0.33333 0.00000 0.05400 Ca2 0.33333 0.00000 0.22100 C1 0.24500 0.33333 0.13800 C2 0.24500 0.33333 0.30400 O1 0.06700 0.33333 0.13800 O2 0.06700 0.33333 0.30400 O3 0.33333 0.33333 0.12400 O4 0.33333 0.33333 0.15100 O5 0.33333 0.33333 0.29100 O6 0.33333 0.33333 0.31700 F1 0.00000 0.00000 0.00000 F2 0.00000 0.00000 0.33333 F3 0.00000 0.00000 0.66667 F4 0.00000 0.00000 0.10800 F5 0.00000 0.00000 0.44100 F6 0.00000 0.00000 0.77500 F7 0.00000 0.00000 0.16700 F8 0.00000 0.00000 0.50000 F9 0.00000 0.00000 0.83400 F10 0.00000 0.00000 0.27500 F11 0.00000 0.00000 0.60800 F12 0.00000 0.00000 0.94200