Two types of rare earth‒organic frameworks constructed by racemic tartaric acid
Jiang, Zhan-Guo; Lv, Yao-Kang; Cheng, Jian-Wen; Feng, Yun-Long; Journal of Solid State Chemistry 185 (2012) 253–263; doi:10.1016/j.jssc.2011.11.012

data_1563088
_publ_section_title
;
 Two types of rare earth--organic frameworks constructed by racemic
 tartaric acid
;
_journal_name_full               'Journal of Solid State Chemistry'
_journal_page_first              253
_journal_page_last               263
_journal_paper_doi               10.1016/j.jssc.2011.11.012
_journal_volume                  185
_journal_year                    2012
_chemical_formula_moiety         'C12 H16 Eu2 O20'
_chemical_formula_sum            'C12 H16 Eu2 O20'
_chemical_formula_weight         784.17
_space_group_IT_number           45
_space_group_name_Hall           'I 2 -2c'
_space_group_name_H-M_alt        'I b a 2'
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'I 2 -2c'
_symmetry_space_group_name_H-M   'I b a 2'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   12.5257(2)
_cell_length_b                   14.20850(10)
_cell_length_c                   10.53970(10)
_cell_measurement_reflns_used    8868
_cell_measurement_temperature    296(2)
_cell_measurement_theta_max      27.42
_cell_measurement_theta_min      2.87
_cell_volume                     1875.77(4)
_computing_cell_refinement       'SAINT (Bruker, 2006)'
_computing_data_collection       'APEXII (Bruker, 2006)'
_computing_data_reduction        SAINT
_computing_molecular_graphics    'SHELXTL (Bruker, 2002)'
_computing_publication_material  SHELXTL
_computing_structure_refinement  'SHELXL97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      296(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_diffrn_measurement_device_type  'Bruker APEX-II area-detector diffractometer'
_diffrn_measurement_method       '\w scans'
_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  0.0402
_diffrn_reflns_av_sigmaI/netI    0.0183
_diffrn_reflns_limit_h_max       16
_diffrn_reflns_limit_h_min       -16
_diffrn_reflns_limit_k_max       18
_diffrn_reflns_limit_k_min       -18
_diffrn_reflns_limit_l_max       13
_diffrn_reflns_limit_l_min       -13
_diffrn_reflns_number            13815
_diffrn_reflns_theta_full        27.42
_diffrn_reflns_theta_max         27.42
_diffrn_reflns_theta_min         2.87
_diffrn_standards_decay_%        none
_diffrn_standards_interval_count none
_diffrn_standards_interval_time  none
_diffrn_standards_number         none
_exptl_absorpt_coefficient_mu    6.738
_exptl_absorpt_correction_T_max  0.186
_exptl_absorpt_correction_T_min  0.141
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details   'SADABS (Sheldrick, 1996)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    2.777
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             1496
_exptl_crystal_size_max          0.33
_exptl_crystal_size_mid          0.26
_exptl_crystal_size_min          0.25
_refine_diff_density_max         1.059
_refine_diff_density_min         -0.559
_refine_diff_density_rms         0.129
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.00(7)
_refine_ls_extinction_coef       0.00133(9)
_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   1.001
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     171
_refine_ls_number_reflns         1131
_refine_ls_number_restraints     6
_refine_ls_restrained_S_all      1.000
_refine_ls_R_factor_all          0.0164
_refine_ls_R_factor_gt           0.0161
_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^)+(0.0333P)^2^+1.2900P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0454
_refine_ls_wR_factor_ref         0.0457
_reflns_number_gt                1107
_reflns_number_total             1131
_reflns_threshold_expression     I>2\s(I)
_cod_data_source_file            JSSC-2012-185-253.CIF
_cod_data_source_block           a
_cod_original_sg_symbol_Hall     'I 2 -2c  '
_cod_original_sg_symbol_H-M      Iba2
_cod_database_code               1563088