Structural Evolution of Ag-LEV Zeolite upon Heating: An In Situ Single-Crystal X-ray Diffraction (SC-XRD) and X-ray Absorption Spectroscopy (XAS) Study.
Cametti, Georgia; Scheinost, Andreas C.; Churakov, Sergey V.; ACS omega 5 (2020) 31774–31783; doi:10.1021/acsomega.0c04455

data_4518284
_publ_section_title
;
 Structural Evolution of Ag-LEV Zeolite upon Heating: An In Situ
 Single-Crystal X-ray Diffraction (SC-XRD) and X-ray Absorption
 Spectroscopy (XAS) Study.
;
_journal_issue                   49
_journal_name_full               'ACS omega'
_journal_page_first              31774
_journal_page_last               31783
_journal_paper_doi               10.1021/acsomega.0c04455
_journal_volume                  5
_journal_year                    2020
_chemical_formula_sum            'Ag7.8 O108 Si54'
_chemical_formula_weight         4086.25
_chemical_name_common            Ag-levyne
_space_group_crystal_system      trigonal
_space_group_IT_number           160
_space_group_name_Hall           'R 3 -2"'
_space_group_name_H-M_alt        'R 3 m :H'
_atom_sites_solution_primary     dual
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-2014
_cell_angle_alpha                90.00(3)
_cell_angle_beta                 90.00(3)
_cell_angle_gamma                120.00(3)
_cell_formula_units_Z            1
_cell_length_a                   12.943(3)
_cell_length_b                   12.943(3)
_cell_length_c                   23.641(5)
_cell_measurement_reflns_used    1533
_cell_measurement_temperature    296(2)
_cell_measurement_theta_max      20.46
_cell_measurement_theta_min      2.5
_cell_volume                     3429.8(17)
_computing_structure_refinement  'SHELXL-2014 (Sheldrick, 2014)'
_diffrn_ambient_temperature      296(2)
_diffrn_measured_fraction_theta_full 0.746
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_device_type  'APEX II'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0837
_diffrn_reflns_av_unetI/netI     0.0540
_diffrn_reflns_Laue_measured_fraction_full 0.746
_diffrn_reflns_Laue_measured_fraction_max 1.000
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       -14
_diffrn_reflns_limit_k_max       14
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       25
_diffrn_reflns_limit_l_min       -22
_diffrn_reflns_number            9491
_diffrn_reflns_point_group_measured_fraction_full 0.713
_diffrn_reflns_point_group_measured_fraction_max 0.958
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         22.646
_diffrn_reflns_theta_min         2.011
_diffrn_source                   'fine-focus sealed tube'
_exptl_absorpt_coefficient_mu    1.673
_exptl_absorpt_correction_T_max  0.7448
_exptl_absorpt_correction_T_min  0.5180
_exptl_absorpt_correction_type   multi-scan
_exptl_crystal_colour            gray
_exptl_crystal_density_diffrn    1.978
_exptl_crystal_description       fragment
_exptl_crystal_F_000             1987
_exptl_crystal_size_max          0.180
_exptl_crystal_size_mid          0.150
_exptl_crystal_size_min          0.100
_refine_diff_density_max         0.589
_refine_diff_density_min         -0.594
_refine_diff_density_rms         0.123
_refine_ls_abs_structure_details
;
 Flack x determined using 331 quotients [(I+)-(I-)]/[(I+)+(I-)]
 (Parsons, Flack and Wagner, Acta Cryst. B69 (2013) 249-259).
;
_refine_ls_abs_structure_Flack   0.50(8)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.101
_refine_ls_hydrogen_treatment    undef
_refine_ls_matrix_type           full
_refine_ls_number_parameters     89
_refine_ls_number_reflns         1130
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.101
_refine_ls_R_factor_all          0.1092
_refine_ls_R_factor_gt           0.0812
_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^)+(0.1255P)^2^+45.2228P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.2240
_refine_ls_wR_factor_ref         0.2508
_reflns_Friedel_coverage         0.904
_reflns_Friedel_fraction_full    0.681
_reflns_Friedel_fraction_max     0.915
_reflns_number_gt                813
_reflns_number_total             1130
_reflns_threshold_expression     'I > 2\s(I)'
_cod_data_source_file            ao0c04455_si_007.cif
_cod_data_source_block           shelx
_cod_depositor_comments
'Adding full bibliography for 4518279--4518286.cif.'
_cod_original_cell_volume        3429.9(17)
_cod_original_formula_sum        'Ag7.80 O108 Si54'
_cod_database_code               4518284
_shelxl_version_number           2014-1
_shelx_res_checksum              65027
_shelx_hkl_checksum              1920