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_4103451
_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            'Be H2 K2 O8 Si4'
_chemical_formula_weight         329.59
_chemical_name_systematic
;
 ?
;
_space_group_IT_number           9
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  'C -2yc'
_symmetry_space_group_name_H-M   'C 1 c 1'
_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                 104.209(2)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   12.1773(5)
_cell_length_b                   7.0903(3)
_cell_length_c                   12.8804(4)
_cell_measurement_temperature    293(2)
_cell_volume                     1078.08(7)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.992
_diffrn_measured_fraction_theta_max 0.992
_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  0.0347
_diffrn_reflns_av_sigmaI/netI    0.0417
_diffrn_reflns_limit_h_max       15
_diffrn_reflns_limit_h_min       -13
_diffrn_reflns_limit_k_max       9
_diffrn_reflns_limit_k_min       -8
_diffrn_reflns_limit_l_max       16
_diffrn_reflns_limit_l_min       -16
_diffrn_reflns_number            6352
_diffrn_reflns_theta_full        27.52
_diffrn_reflns_theta_max         27.52
_diffrn_reflns_theta_min         3.26
_exptl_absorpt_coefficient_mu    0.669
_exptl_crystal_density_diffrn    1.015
_exptl_crystal_density_method    'not measured'
_exptl_crystal_F_000             328
_refine_diff_density_max         2.108
_refine_diff_density_min         -0.716
_refine_diff_density_rms         0.173
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.30(18)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.078
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     172
_refine_ls_number_reflns         2136
_refine_ls_number_restraints     5
_refine_ls_restrained_S_all      1.076
_refine_ls_R_factor_all          0.0644
_refine_ls_R_factor_gt           0.0574
_refine_ls_shift/su_max          8.285
_refine_ls_shift/su_mean         0.137
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0513P)^2^+15.6448P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1282
_refine_ls_wR_factor_ref         0.1346
_reflns_number_gt                1895
_reflns_number_total             2136
_reflns_threshold_expression     >2\s(I)
_cod_data_source_file            ja106313p_si_010.cif
_cod_data_source_block           2007jaa0016
_cod_original_formula_sum        'H2 Be K2 O8 Si4'
_cod_database_code               4103451