Molecular sieving of ethylene from ethane using a rigid metal-organic framework
Rui-Biao Lin; Libo Li; Hao-Long Zhou; Hui Wu; Chaohui He; Shun Li; Rajamani Krishna; Jinping Li; Wei Zhou; Banglin Chen; Nature Materials 17 (2018) 1128–1133; doi:10.1038/s41563-018-0206-2

data_1550332
_publ_section_title
;
 Molecular sieving of ethylene from ethane using a rigid metal-organic
 framework
;
_journal_name_full               'Nature Materials'
_journal_page_first              1128
_journal_page_last               1133
_journal_paper_doi               10.1038/s41563-018-0206-2
_journal_volume                  17
_journal_year                    2018
_chemical_formula_moiety         'C4 H2 Ca O5, 0.16(C2 H4)'
_chemical_formula_sum            'C4.32 H2.64 Ca O5'
_chemical_formula_weight         173.17
_space_group_crystal_system      tetragonal
_space_group_IT_number           122
_space_group_name_Hall           'I -4 2bw'
_space_group_name_H-M_alt        'I -4 2 d'
_symmetry_space_group_name_Hall  'I -4 2bw'
_symmetry_space_group_name_H-M   'I -4 2 d'
_atom_sites_solution_hydrogens   mixed
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_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            8
_cell_length_a                   13.61515(13)
_cell_length_b                   13.61515(13)
_cell_length_c                   7.67903(13)
_cell_measurement_reflns_used    2843
_cell_measurement_temperature    298(2)
_cell_measurement_theta_max      76.8190
_cell_measurement_theta_min      6.4840
_cell_volume                     1423.48(3)
_computing_cell_refinement       'CrysAlisPro 1.171.38.30e (Agilent, 2015)'
_computing_data_collection       'CrysAlisPro 1.171.38.30e (Agilent, 2015)'
_computing_data_reduction        'CrysAlisPro 1.171.38.30e (Agilent, 2015)'
_computing_structure_refinement  'SHELXL-2014/7 (Sheldrick, 2014)'
_diffrn_ambient_temperature      298(2)
_diffrn_measured_fraction_theta_full 0.992
_diffrn_measured_fraction_theta_max 0.992
_diffrn_measurement_device_type
'dtrek-CrysAlisPro-abstract goniometer imported rigaku-d*trek images'
_diffrn_radiation_type           CuK\a
_diffrn_radiation_wavelength     1.54184
_diffrn_reflns_av_R_equivalents  0.0978
_diffrn_reflns_av_unetI/netI     0.0567
_diffrn_reflns_Laue_measured_fraction_full 0.992
_diffrn_reflns_Laue_measured_fraction_max 0.992
_diffrn_reflns_limit_h_max       15
_diffrn_reflns_limit_h_min       -16
_diffrn_reflns_limit_k_max       16
_diffrn_reflns_limit_k_min       -16
_diffrn_reflns_limit_l_max       8
_diffrn_reflns_limit_l_min       -6
_diffrn_reflns_number            2330
_diffrn_reflns_point_group_measured_fraction_full 0.995
_diffrn_reflns_point_group_measured_fraction_max 0.995
_diffrn_reflns_theta_full        64.952
_diffrn_reflns_theta_max         64.952
_diffrn_reflns_theta_min         6.502
_diffrn_source                   'fine-focus sealed X-ray tube'
_exptl_absorpt_coefficient_mu    7.425
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            Colourless
_exptl_crystal_density_diffrn    1.616
_exptl_crystal_description       Block
_exptl_crystal_F_000             695
_exptl_crystal_size_max          0.250
_exptl_crystal_size_mid          0.120
_exptl_crystal_size_min          0.120
_refine_diff_density_max         0.786
_refine_diff_density_min         -0.762
_refine_diff_density_rms         0.207
_refine_ls_abs_structure_details
;
 Refined as an inversion twin.
;
_refine_ls_abs_structure_Flack   1.03(4)
_refine_ls_extinction_coef       0.020(6)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     'SHELXL-2014/7 (Sheldrick 2014'
_refine_ls_goodness_of_fit_ref   1.135
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     65
_refine_ls_number_reflns         593
_refine_ls_number_restraints     25
_refine_ls_restrained_S_all      1.138
_refine_ls_R_factor_all          0.0806
_refine_ls_R_factor_gt           0.0747
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[\s^2^(Fo^2^)+(0.1962P)^2^+0.2279P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.2029
_refine_ls_wR_factor_ref         0.2211
_reflns_Friedel_coverage         0.706
_reflns_Friedel_fraction_full    1.000
_reflns_Friedel_fraction_max     1.000
_reflns_number_gt                584
_reflns_number_total             593
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            File-1.cif
_cod_data_source_block           UTSA-280_C2H4_LL
_cod_original_cell_volume        1423.48(4)
_cod_database_code               1550332
_shelx_shelxl_version_number     2014/7
_shelx_estimated_absorpt_t_min   0.258
_shelx_estimated_absorpt_t_max   0.469
_shelx_res_checksum              98524
_shelx_hkl_checksum              43402