Beryllosilicate Frameworks and Zeolites
Jennifer A. Armstrong; Mark T. Weller; Journal of the American Chemical Society 132 (2010) 15679–15686; doi:10.1021/ja106313p

data_4103446
_publ_section_title
;
 Beryllosilicate Frameworks and Zeolites
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              15679
_journal_page_last               15686
_journal_paper_doi               10.1021/ja106313p
_journal_volume                  132
_journal_year                    2010
_chemical_formula_sum            'Be12 Na4 O4 Si4'
_chemical_formula_weight         376.44
_chemical_name_systematic
;
 ?
;
_space_group_IT_number           82
_symmetry_cell_setting           tetragonal
_symmetry_space_group_name_Hall  'I -4'
_symmetry_space_group_name_H-M   'I -4'
_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            2
_cell_length_a                   9.8276(4)
_cell_length_b                   9.8276(4)
_cell_length_c                   9.6372(7)
_cell_measurement_temperature    293(2)
_cell_volume                     930.78(9)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.989
_diffrn_measured_fraction_theta_max 0.989
_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  0.0697
_diffrn_reflns_av_sigmaI/netI    0.0559
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       12
_diffrn_reflns_limit_l_min       -10
_diffrn_reflns_number            3937
_diffrn_reflns_theta_full        27.48
_diffrn_reflns_theta_max         27.48
_diffrn_reflns_theta_min         4.15
_exptl_absorpt_coefficient_mu    0.404
_exptl_crystal_density_diffrn    1.343
_exptl_crystal_density_method    'not measured'
_exptl_crystal_F_000             360
_refine_diff_density_max         0.716
_refine_diff_density_min         -0.548
_refine_diff_density_rms         0.152
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   1.4(18)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.118
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     61
_refine_ls_number_reflns         1035
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.118
_refine_ls_R_factor_all          0.0777
_refine_ls_R_factor_gt           0.0723
_refine_ls_shift/su_max          5.681
_refine_ls_shift/su_mean         0.099
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0828P)^2^+11.6572P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1890
_refine_ls_wR_factor_ref         0.1944
_reflns_number_gt                968
_reflns_number_total             1035
_reflns_threshold_expression     >2\s(I)
_cod_data_source_file            ja106313p_si_005.cif
_cod_data_source_block           2007jaa0003i-4
_cod_database_code               4103446