data_global _chemical_name_mineral 'Claudetite II' loop_ _publ_author_name 'Pertlik F' _journal_name_full 'Monatshefte fur Chemie' _journal_volume 106 _journal_year 1975 _journal_page_first 755 _journal_page_last 762 _publ_section_title ; Die kristallstruktur der monoklinen form von As2O3 (Claudetit II) ; _database_code_amcsd 0014662 _chemical_compound_source 'Synthetic' _chemical_formula_sum 'As2 O3' _cell_length_a 7.990 _cell_length_b 4.645 _cell_length_c 9.115 _cell_angle_alpha 90 _cell_angle_beta 78.3 _cell_angle_gamma 90 _cell_volume 331.261 _exptl_crystal_density_diffrn 3.967 _symmetry_space_group_name_H-M 'P 1 21/n 1' loop_ _space_group_symop_operation_xyz 'x,y,z' '1/2+x,1/2-y,1/2+z' '1/2-x,1/2+y,1/2-z' '-x,-y,-z' loop_ _atom_site_label _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z As1 0.61630 0.83110 0.30130 As2 0.18410 0.29200 0.37170 O1 0.67700 0.45900 0.29100 O2 0.23800 0.14000 0.18400 O3 0.96600 0.34900 0.36700 loop_ _atom_site_aniso_label _atom_site_aniso_U_11 _atom_site_aniso_U_22 _atom_site_aniso_U_33 _atom_site_aniso_U_12 _atom_site_aniso_U_13 _atom_site_aniso_U_23 As1 0.01240 0.01148 0.01735 0.00313 -0.00106 -0.00105 As2 0.01116 0.01377 0.01534 -0.00037 -0.00071 0.00189 O1 0.01240 0.01312 0.04843 0.00736 0.00354 0.02100 O2 0.04962 0.01202 0.03229 0.02025 0.00354 -0.00840 O3 0.01240 0.03607 0.01614 0.00552 -0.00354 0.00630