data_global _chemical_name_mineral 'Euchroite' loop_ _publ_author_name 'Eby R K' 'Hawthorne F C' _journal_name_full 'Acta Crystallographica, Section C' _journal_volume 45 _journal_year 1989 _journal_page_first 1479 _journal_page_last 1482 _publ_section_title ; Euchroite, a heteropolyhedral framework structure ; _database_code_amcsd 0018354 _chemical_compound_source 'Coller cliff, Montana, USA' _chemical_formula_sum 'Cu2 As O8 H7' _cell_length_a 10.506 _cell_length_b 10.506 _cell_length_c 6.103 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 90 _cell_volume 673.625 _exptl_crystal_density_diffrn 3.324 _symmetry_space_group_name_H-M 'P 21 21 21' loop_ _space_group_symop_operation_xyz 'x,y,z' '-x,1/2+y,1/2-z' '1/2+x,1/2-y,-z' '1/2-x,-y,1/2+z' loop_ _atom_site_label _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z _atom_site_U_iso_or_equiv Cu1 0.75610 0.99123 0.03130 0.16600 Cu2 0.80047 0.75076 0.33330 0.18000 As 0.60936 0.76411 0.78240 0.15100 O1 0.67320 0.83030 0.54550 0.18000 O2 0.69690 0.81460 0.99760 0.19600 O3 0.45270 0.81830 0.81570 0.17600 O4 0.61180 0.60630 0.75080 0.19000 O-H 0.84730 0.93260 0.29300 0.16300 Wat1 0.72120 0.58160 0.36180 0.21700 Wat2 0.57100 0.05470 0.27850 0.27400 Wat3 0.93210 0.68940 0.72230 0.31400