Single Crystal X-Ray Structure of BeF2: α-Quartz
Ghalsasi, Pallavi; Ghalsasi, Prasanna S.; Inorganic Chemistry 50 (2011) 86–89; doi:10.1021/ic101248g

data_4324085
_publ_section_title
;
 Single Crystal X-Ray Structure of BeF2: \a-Quartz
;
_journal_coden_ASTM              INOCAJ
_journal_issue                   1
_journal_name_full               'Inorganic Chemistry'
_journal_page_first              86
_journal_page_last               89
_journal_paper_doi               10.1021/ic101248g
_journal_volume                  50
_journal_year                    2011
_chemical_compound_source        synthetic
_chemical_formula_moiety         '2(F), Be'
_chemical_formula_sum            'Be F2'
_chemical_formula_weight         47.01
_space_group_IT_number           152
_symmetry_cell_setting           trigonal
_symmetry_space_group_name_Hall  'P 31 2"'
_symmetry_space_group_name_H-M   'P 31 2 1'
_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                120.00
_cell_formula_units_Z            3
_cell_length_a                   4.7390(5)
_cell_length_b                   4.7390(5)
_cell_length_c                   5.1875(8)
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      28.07
_cell_measurement_theta_min      3.93
_cell_volume                     100.89(2)
_computing_cell_refinement       'Bruker SMART'
_computing_data_collection       'Bruker SMART'
_computing_data_reduction        'Bruker SAINT'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 0.888
_diffrn_measured_fraction_theta_max 0.888
_diffrn_measurement_device_type  'CCD area detector'
_diffrn_measurement_method       'phi and omega 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  0.0257
_diffrn_reflns_av_sigmaI/netI    0.0363
_diffrn_reflns_limit_h_max       6
_diffrn_reflns_limit_h_min       -6
_diffrn_reflns_limit_k_max       6
_diffrn_reflns_limit_k_min       -6
_diffrn_reflns_limit_l_max       6
_diffrn_reflns_limit_l_min       -6
_diffrn_reflns_number            752
_diffrn_reflns_theta_full        29.15
_diffrn_reflns_theta_max         29.15
_diffrn_reflns_theta_min         3.93
_exptl_absorpt_coefficient_mu    0.318
_exptl_absorpt_correction_T_max  0.93
_exptl_absorpt_correction_T_min  0.91
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS (Sheldrick, 1997)'
_exptl_crystal_colour            clear
_exptl_crystal_density_diffrn    2.321
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       cubes
_exptl_crystal_F_000             66
_exptl_crystal_size_max          0.40
_exptl_crystal_size_mid          0.26
_exptl_crystal_size_min          0.20
_refine_diff_density_max         0.107
_refine_diff_density_min         -0.131
_refine_diff_density_rms         0.037
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   3(2)
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.141
_refine_ls_hydrogen_treatment    none
_refine_ls_matrix_type           full
_refine_ls_number_parameters     16
_refine_ls_number_reflns         167
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.141
_refine_ls_R_factor_all          0.0187
_refine_ls_R_factor_gt           0.0186
_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^)+(0.0000P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0409
_refine_ls_wR_factor_ref         0.0410
_reflns_number_gt                166
_reflns_number_total             167
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ic101248g_si_001.cif
_cod_data_source_block           wyo104m
_cod_database_code               4324085