data_global _chemical_name_mineral 'Papagoite' loop_ _publ_author_name 'Groat L A' 'Hawthorne F C' _journal_name_full 'Mineralogy and Petrology' _journal_volume 37 _journal_year 1987 _journal_page_first 89 _journal_page_last 96 _publ_section_title ; Refinement of the structure of papagoite, CaCuAlSi2O6(OH)3 Note: U(1,1)(O3) changed from .0068 to match reported Uiso ; _database_code_amcsd 0014616 _chemical_compound_source 'Ajo, Pima County, Arizona, USA' _chemical_formula_sum 'Ca Cu Al Si2 O9' _cell_length_a 12.926 _cell_length_b 11.496 _cell_length_c 4.696 _cell_angle_alpha 90 _cell_angle_beta 100.81 _cell_angle_gamma 90 _cell_volume 685.430 _exptl_crystal_density_diffrn 3.205 _symmetry_space_group_name_H-M 'C 1 2/m 1' loop_ _space_group_symop_operation_xyz 'x,y,z' '1/2+x,1/2+y,z' 'x,-y,z' '1/2+x,1/2-y,z' '-x,y,-z' '1/2-x,1/2+y,-z' '-x,-y,-z' '1/2-x,1/2-y,-z' loop_ _atom_site_label _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z _atom_site_U_iso_or_equiv Ca 0.00000 0.15530 0.50000 0.01100 Cu 0.26873 0.50000 0.44610 0.00770 Al 0.25000 0.25000 0.50000 0.00510 Si 0.38740 0.13238 0.06780 0.00490 O1 0.20050 0.36970 0.22590 0.00860 O2 0.16310 0.12680 0.30730 0.00740 O3 0.42340 0.50000 0.23170 0.00800 O4 0.00000 0.31980 0.00000 0.01100 O5 0.36150 0.22090 0.30580 0.00890 O6 0.40130 0.00000 0.19310 0.01100 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 Ca 0.00490 0.00970 0.01770 0.00000 0.00060 0.00000 Cu 0.00880 0.00490 0.00810 0.00000 -0.00180 0.00000 Al 0.00470 0.00590 0.00530 0.00070 0.00220 -0.00030 Si 0.00400 0.00540 0.00560 -0.00030 0.00110 -0.00090 O1 0.01010 0.00660 0.00790 -0.00020 -0.00180 0.00000 O2 0.00870 0.00650 0.00690 -0.00010 0.00020 0.00070 O3 0.00860 0.00720 0.00770 0.00000 -0.00150 0.00000 O4 0.00730 0.01060 0.01620 0.00000 0.00450 0.00000 O5 0.00760 0.01060 0.00950 -0.00010 0.00430 -0.00330 O6 0.01350 0.00740 0.01090 0.00000 -0.00300 0.00000