Structure Change via Partial Se/Te Substitution: Crystal Structure and Physical Properties of the Telluride Ba2Cu4-xTe5 in Contrast to the Selenide-Telluride Ba2Cu4-xSeyTe5-y
Oottil Mayasree; Yanjie Cui; Abdeljalil Assoud; Holger Kleinke; Inorganic Chemistry 49 (2010) 6518–6524; doi:10.1021/ic100268q

data_4316030
_publ_section_title
;
 Structure Change via Partial Se/Te Substitution: Crystal Structure and
 Physical Properties of the Telluride Ba2Cu4-xTe5 in Contrast to the
 Selenide-Telluride Ba2Cu4-xSeyTe5-y
;
_journal_name_full               'Inorganic Chemistry'
_journal_page_first              6518
_journal_page_last               6524
_journal_paper_doi               10.1021/ic100268q
_journal_volume                  49
_journal_year                    2010
_chemical_formula_sum            'Ba2 Cu3.24 Te5'
_chemical_formula_weight         1117.91
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           15
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-C 2yc'
_symmetry_space_group_name_H-M   'C 1 2/c 1'
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 101.567(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   9.4425(8)
_cell_length_b                   9.3390(7)
_cell_length_c                   13.3164(11)
_cell_measurement_temperature    298(2)
_cell_volume                     1150.44(16)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      298(2)
_diffrn_measured_fraction_theta_full 0.939
_diffrn_measured_fraction_theta_max 0.939
_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  0.0220
_diffrn_reflns_av_sigmaI/netI    0.0398
_diffrn_reflns_limit_h_max       7
_diffrn_reflns_limit_h_min       -14
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       -14
_diffrn_reflns_limit_l_max       21
_diffrn_reflns_limit_l_min       -21
_diffrn_reflns_number            4009
_diffrn_reflns_theta_full        34.94
_diffrn_reflns_theta_max         34.94
_diffrn_reflns_theta_min         3.10
_exptl_absorpt_coefficient_mu    24.975
_exptl_absorpt_correction_T_max  1.00
_exptl_absorpt_correction_T_min  0.62
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            black
_exptl_crystal_density_diffrn    6.454
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             1863
_exptl_crystal_size_max          0.10
_exptl_crystal_size_mid          0.04
_exptl_crystal_size_min          0.02
_refine_diff_density_max         1.815
_refine_diff_density_min         -1.613
_refine_diff_density_rms         0.321
_refine_ls_extinction_coef       0.00036(4)
_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   1.164
_refine_ls_matrix_type           full
_refine_ls_number_parameters     62
_refine_ls_number_reflns         2369
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.164
_refine_ls_R_factor_all          0.0434
_refine_ls_R_factor_gt           0.0381
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0242P)^2^+3.3672P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0771
_refine_ls_wR_factor_ref         0.0794
_reflns_number_gt                2144
_reflns_number_total             2369
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ic100268q_si_003.cif
_cod_data_source_block           Ba2Cu324Te5
_cod_database_code               4316030