A Series of New Phases Containing Three Different Asymmetric Building Units
Pei-Xin Li; Fang Kong; Chun-Li Hu; Na Zhao; Jiang-Gao Mao; Inorganic Chemistry 49 (2010) 5943–5952; doi:10.1021/ic100462r

data_4315915
_publ_section_title
;
 A Series of New Phases Containing Three Different Asymmetric Building
 Units
;
_journal_name_full               'Inorganic Chemistry'
_journal_page_first              5943
_journal_page_last               5952
_journal_paper_doi               10.1021/ic100462r
_journal_volume                  49
_journal_year                    2010
_chemical_formula_sum            'Nb2 O15 Pb2 Se4'
_chemical_formula_weight         1156.04
_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_hydrogens   none
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 94.503(7)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   26.493(12)
_cell_length_b                   7.001(3)
_cell_length_c                   7.686(3)
_cell_measurement_reflns_used    1834
_cell_measurement_temperature    293(2)
_cell_measurement_theta_max      27.4719
_cell_measurement_theta_min      2.6581
_cell_volume                     1421.2(10)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      293(2)
_diffrn_detector_area_resol_mean 28.5714
_diffrn_measured_fraction_theta_full 0.992
_diffrn_measured_fraction_theta_max 0.992
_diffrn_measurement_device_type  Saturn70
_diffrn_measurement_method       CCD_Profile_fitting
_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  0.0378
_diffrn_reflns_av_sigmaI/netI    0.0385
_diffrn_reflns_limit_h_max       34
_diffrn_reflns_limit_h_min       -34
_diffrn_reflns_limit_k_max       9
_diffrn_reflns_limit_k_min       -9
_diffrn_reflns_limit_l_max       9
_diffrn_reflns_limit_l_min       -6
_diffrn_reflns_number            5356
_diffrn_reflns_theta_full        27.47
_diffrn_reflns_theta_max         27.47
_diffrn_reflns_theta_min         3.01
_diffrn_standards_decay_%        <1.0%
_exptl_absorpt_coefficient_mu    35.517
_exptl_absorpt_correction_T_max  1.0000
_exptl_absorpt_correction_T_min  0.7577
_exptl_absorpt_correction_type   multi-scan
_exptl_crystal_colour            Colorless
_exptl_crystal_density_diffrn    5.403
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       Prism
_exptl_crystal_F_000             2008
_exptl_crystal_size_max          0.0500
_exptl_crystal_size_mid          0.0200
_exptl_crystal_size_min          0.0100
_refine_diff_density_max         3.479
_refine_diff_density_min         -1.289
_refine_diff_density_rms         0.338
_refine_ls_extinction_coef       0.00015(3)
_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   1.107
_refine_ls_hydrogen_treatment    none
_refine_ls_matrix_type           full
_refine_ls_number_parameters     106
_refine_ls_number_reflns         1609
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.107
_refine_ls_R_factor_all          0.0411
_refine_ls_R_factor_gt           0.0348
_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^)+(0.0301P)^2^+44.4639P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0736
_refine_ls_wR_factor_ref         0.0757
_reflns_number_gt                1442
_reflns_number_total             1609
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ic100462r_si_001_3.cif
_cod_data_source_block           Pb2Nb2Se4O15
_cod_depositor_comments
;
The following automatic conversions were performed:

'_exptl_absorpt_correction_type' value 'Multi-scan' changed to
'multi-scan' according to the built-in table from CIF Core dictionary
named 'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_values 1646 2011-03-28 12:23:43Z adriana 
;
_cod_original_cell_volume        1421.1(11)
_cod_database_code               4315915