data_global _chemical_name_mineral 'Colinowensite' loop_ _publ_author_name 'Sparta K M' 'Roth G' _journal_name_full 'Acta Crystallographica, Section B' _journal_volume 60 _journal_year 2004 _journal_page_first 491 _journal_page_last 495 _publ_section_title ; Reinvestigation of the structure of BaCuSi2O6 - evidence for a phase transition at high temperature Note: T = 293 K ; _database_code_amcsd 0018747 _chemical_compound_source 'Synthetic' _chemical_formula_sum 'Ba Cu Si2 O6' _cell_length_a 10.0091 _cell_length_b 10.0091 _cell_length_c 22.467 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 90 _cell_volume 2250.791 _exptl_crystal_density_diffrn 4.167 _symmetry_space_group_name_H-M 'I 41/a c d' loop_ _space_group_symop_operation_xyz 'x,y,z' '1/2+x,1/2+y,1/2+z' '1/4-y,3/4-x,3/4+z' '3/4-y,1/4-x,1/4+z' '1/4+y,3/4+x,3/4-z' '3/4+y,1/4+x,1/4-z' '1/4+y,3/4-x,1/4-z' '3/4+y,1/4-x,3/4-z' '1/4-y,3/4+x,1/4+z' '3/4-y,1/4+x,3/4+z' '1/2+x,-y,z' '+x,1/2-y,1/2+z' '1/2-x,y,-z' '-x,1/2+y,1/2-z' '1/2+x,y,1/2-z' '+x,1/2+y,-z' '1/2-x,-y,1/2+z' '-x,1/2-y,+z' '1/4+y,1/4+x,1/4+z' '3/4+y,3/4+x,3/4+z' '1/4-y,1/4-x,1/4-z' '3/4-y,3/4-x,3/4-z' '1/4-y,1/4+x,3/4-z' '3/4-y,3/4+x,1/4-z' '1/4+y,1/4-x,3/4+z' '3/4+y,3/4-x,1/4+z' '-x,y,1/2+z' '1/2-x,1/2+y,+z' 'x,-y,1/2-z' '1/2+x,1/2-y,-z' '-x,-y,-z' '1/2-x,1/2-y,1/2-z' loop_ _atom_site_label _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z Ba 0.25000 0.98870 0.50000 Cu 0.00000 0.25000 0.06374 Si 0.27554 0.75110 0.87600 O1 0.19160 0.72180 0.81660 O2 0.37250 0.87860 0.85939 O3 0.30750 0.78130 0.06390 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 Ba 0.01320 0.01200 0.01251 0.00000 -0.00180 0.00000 Cu 0.00890 0.00920 0.01230 0.00000 0.00000 0.00000 Si 0.00780 0.00690 0.01400 0.00020 -0.00700 -0.00080 O1 0.01000 0.01600 0.01700 0.00500 0.00300 0.00200 O2 0.01600 0.01500 0.03700 -0.00240 -0.00300 0.00200 O3 0.00800 0.01500 0.01900 -0.00400 0.00200 0.01200