Concurrently wide bandgaps and good nonlinear optical responses in A2SrMIVS4 (A = Li, Na; MIV = Ge, Sn) as new potential infrared nonlinear optical materials
Wu, Kui; Chu, Yu; Yang, Zhihua; Pan, Shilie; Chemical Science  (2019) –; doi:10.1039/C9SC00028C

data_1550650
_publ_section_title
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 Concurrently wide bandgaps and good nonlinear optical responses in
 A2SrMIVS4 (A = Li, Na; MIV = Ge, Sn) as new potential infrared nonlinear
 optical materials
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_journal_name_full               'Chemical Science'
_journal_paper_doi               10.1039/C9SC00028C
_journal_year                    2019
_chemical_formula_sum            'Ge Na2 S4 Sr'
_chemical_formula_weight         334.43
_space_group_IT_number           161
_symmetry_cell_setting           trigonal
_symmetry_space_group_name_Hall  'R 3 -2"c'
_symmetry_space_group_name_H-M   'R 3 c :H'
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_audit_update_record
;
2018-12-31 deposited with the CCDC.    2019-02-25 downloaded from the CCDC.
;
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                120.00
_cell_formula_units_Z            18
_cell_length_a                   23.5427(14)
_cell_length_b                   23.5427(14)
_cell_length_c                   6.9458(8)
_cell_measurement_reflns_used    3599
_cell_measurement_temperature    296(2)
_cell_measurement_theta_max      27.32
_cell_measurement_theta_min      3.00
_cell_volume                     3334.0(5)
_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  'Bruker SHELXTL'
_computing_structure_solution    'Bruker SHELXTL'
_diffrn_ambient_temperature      296(2)
_diffrn_measured_fraction_theta_full 0.999
_diffrn_measured_fraction_theta_max 0.999
_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  0.0305
_diffrn_reflns_av_sigmaI/netI    0.0468
_diffrn_reflns_limit_h_max       27
_diffrn_reflns_limit_h_min       -30
_diffrn_reflns_limit_k_max       29
_diffrn_reflns_limit_k_min       -30
_diffrn_reflns_limit_l_max       8
_diffrn_reflns_limit_l_min       -9
_diffrn_reflns_number            6493
_diffrn_reflns_theta_full        27.45
_diffrn_reflns_theta_max         27.45
_diffrn_reflns_theta_min         3.00
_exptl_absorpt_coefficient_mu    12.385
_exptl_absorpt_correction_T_max  0.7456
_exptl_absorpt_correction_T_min  0.4775
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   SADABS
_exptl_crystal_colour            colorless
_exptl_crystal_density_diffrn    2.998
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             2808
_exptl_crystal_size_max          0.234
_exptl_crystal_size_mid          0.189
_exptl_crystal_size_min          0.147
_refine_diff_density_max         1.198
_refine_diff_density_min         -0.768
_refine_diff_density_rms         0.204
_refine_ls_abs_structure_details 'Flack H D (1983), Acta Cryst. A39, 876-881'
_refine_ls_abs_structure_Flack   0.011(12)
_refine_ls_extinction_coef       0.00076(9)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   1.088
_refine_ls_matrix_type           full
_refine_ls_number_parameters     74
_refine_ls_number_reflns         1669
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.088
_refine_ls_R_factor_all          0.0335
_refine_ls_R_factor_gt           0.0318
_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^)+(0.0450P)^2^+29.2915P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0895
_refine_ls_wR_factor_ref         0.0901
_reflns_number_gt                1590
_reflns_number_total             1669
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c9sc00028c2.cif
_cod_data_source_block           1
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Trigonal' changed to 'trigonal'
according to
/home/data/users/saulius/crontab/automatic-downloads/rss-feeds/RSC/lib/dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 4973 2017-02-22 13:04:09Z antanas 
;
_cod_original_sg_symbol_H-M      R3c
_cod_database_code               1550650