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_4316029
_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         1118.55
_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                 101.6350(10)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   9.4428(6)
_cell_length_b                   9.3289(6)
_cell_length_c                   13.3028(8)
_cell_measurement_temperature    293(2)
_cell_volume                     1147.78(12)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.943
_diffrn_measured_fraction_theta_max 0.943
_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  0.0240
_diffrn_reflns_av_sigmaI/netI    0.0311
_diffrn_reflns_limit_h_max       14
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       -14
_diffrn_reflns_limit_l_max       21
_diffrn_reflns_limit_l_min       -21
_diffrn_reflns_number            6041
_diffrn_reflns_theta_full        34.99
_diffrn_reflns_theta_max         34.99
_diffrn_reflns_theta_min         3.10
_exptl_absorpt_coefficient_mu    25.051
_exptl_absorpt_correction_T_max  1.00
_exptl_absorpt_correction_T_min  0.80
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            black
_exptl_crystal_density_diffrn    6.473
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             1864
_exptl_crystal_size_max          0.060
_exptl_crystal_size_mid          0.040
_exptl_crystal_size_min          0.040
_refine_diff_density_max         1.674
_refine_diff_density_min         -1.205
_refine_diff_density_rms         0.284
_refine_ls_extinction_coef       0.00013(2)
_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   1.168
_refine_ls_matrix_type           full
_refine_ls_number_parameters     62
_refine_ls_number_reflns         2383
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.168
_refine_ls_R_factor_all          0.0405
_refine_ls_R_factor_gt           0.0365
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0122P)^2^+13.1462P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0615
_refine_ls_wR_factor_ref         0.0630
_reflns_number_gt                2216
_reflns_number_total             2383
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ic100268q_si_002.cif
_cod_data_source_block           Ba2Cu325Te5
_cod_database_code               4316029