Structures and physical properties of new semiconducting polyselenides Ba2CudeltaAg4-deltaSe5 with unprecedented linear Se(3)4- units.
Assoud, Abdeljalil; Xu, Jianxiao; Kleinke, Holger; Inorganic chemistry 46 (2007) 9906–9911; doi:10.1021/ic701278b

data_4339694
_publ_section_title
;
 Structures and physical properties of new semiconducting polyselenides
 Ba2CudeltaAg4-deltaSe5 with unprecedented linear Se(3)4- units.
;
_journal_issue                   23
_journal_name_full               'Inorganic chemistry'
_journal_page_first              9906
_journal_page_last               9911
_journal_paper_doi               10.1021/ic701278b
_journal_volume                  46
_journal_year                    2007
_chemical_formula_sum            'Ag4 Ba2 Se5'
_chemical_formula_weight         1100.96
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           12
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-C 2y'
_symmetry_space_group_name_H-M   'C 1 2/m 1'
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 124.572(3)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   16.189(2)
_cell_length_b                   4.5528(6)
_cell_length_c                   9.2497(13)
_cell_measurement_temperature    298(2)
_cell_volume                     561.36(13)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.970
_diffrn_measured_fraction_theta_max 0.970
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'fine-focus sealed tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0238
_diffrn_reflns_av_sigmaI/netI    0.0347
_diffrn_reflns_limit_h_max       22
_diffrn_reflns_limit_h_min       -22
_diffrn_reflns_limit_k_max       6
_diffrn_reflns_limit_k_min       -6
_diffrn_reflns_limit_l_max       12
_diffrn_reflns_limit_l_min       -12
_diffrn_reflns_number            2190
_diffrn_reflns_theta_full        29.99
_diffrn_reflns_theta_max         29.99
_diffrn_reflns_theta_min         2.67
_exptl_absorpt_coefficient_mu    29.887
_exptl_absorpt_correction_T_max  1.00
_exptl_absorpt_correction_T_min  0.68
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details   sadabs
_exptl_crystal_colour            black
_exptl_crystal_density_diffrn    6.513
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       needle-like
_exptl_crystal_F_000             940
_exptl_crystal_size_max          0.016
_exptl_crystal_size_mid          0.002
_exptl_crystal_size_min          0.002
_refine_diff_density_max         1.320
_refine_diff_density_min         -1.837
_refine_diff_density_rms         0.299
_refine_ls_extinction_coef       0.00036(11)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   1.094
_refine_ls_matrix_type           full
_refine_ls_number_parameters     39
_refine_ls_number_reflns         883
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.094
_refine_ls_R_factor_all          0.0304
_refine_ls_R_factor_gt           0.0277
_refine_ls_shift/su_max          0.003
_refine_ls_shift/su_mean         0.001
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0158P)^2^+7.5259P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0601
_refine_ls_wR_factor_ref         0.0613
_reflns_number_gt                820
_reflns_number_total             883
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ic701278b-file002.cif
_cod_data_source_block           Ba2Ag4Se5
_cod_original_cell_volume        561.38(13)
_cod_original_sg_symbol_H-M      'C 2/m'
_cod_database_code               4339694