Cs2Hg3S4: A Low-Dimensional Direct Bandgap Semiconductor
Islam, Saiful M.; Vanishri, S.; Li, Hao; Stoumpos, Constantinos C.; Peters, John. A.; Sebastian, Maria; Liu, Zhifu; Wang, Shichao; Haynes, Alyssa S.; Im, Jino; Freeman, Arthur J.; Wessels, Bruce; Kanatzidis, Mercouri G.; Chemistry of Materials 27 (2015) 370–; doi:10.1021/cm504089r

data_4002165
_publ_section_title
;
 Cs2Hg3S4: A Low-Dimensional Direct Bandgap Semiconductor
;
_journal_issue                   1
_journal_name_full               'Chemistry of Materials'
_journal_page_first              370
_journal_paper_doi               10.1021/cm504089r
_journal_volume                  27
_journal_year                    2015
_chemical_compound_source        'synthesis as described'
_chemical_formula_moiety         'Cs2 Hg3 S4'
_chemical_formula_sum            'Cs2 Hg3 S4'
_chemical_formula_weight         995.83
_chemical_name_systematic
;
 ?
;
_space_group_IT_number           72
_symmetry_cell_setting           orthorhombic
_symmetry_Int_Tables_number      72
_symmetry_space_group_name_Hall  '-I 2 2c'
_symmetry_space_group_name_H-M   'I b a m'
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_conform_dict_location     ftp://ftp.iucr.org/pub/cif_core.dic
_audit_conform_dict_name         cif_core.dic
_audit_conform_dict_version      2.4
_audit_creation_date             2013-10-31T11:51:02-00:00
_audit_creation_method           'WinGX routine CIF_UPDATE'
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   6.2778(13)
_cell_length_b                   11.601(2)
_cell_length_c                   14.431(3)
_cell_measurement_reflns_used    0
_cell_measurement_temperature    293
_cell_measurement_theta_max      0
_cell_measurement_theta_min      0
_cell_measurement_wavelength     0.71073
_cell_volume                     1051.0(4)
_computing_molecular_graphics    'Ortep-3 for Windows (Farrugia, 1997)'
_computing_publication_material  'WinGX publication routines (Farrugia, 1999)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SUPERFLIP (Palatinus & Chapuis, 2007)'
_diffrn_ambient_temperature      293
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.997
_diffrn_measurement_device       '2-circle goniometer'
_diffrn_measurement_device_type  'STOE IPDS 2'
_diffrn_measurement_method       'rotation method'
_diffrn_radiation_monochromator  'plane graphite'
_diffrn_radiation_probe          x-ray
_diffrn_radiation_source
'sealed X-ray tube, 12 x 0.4 mm long-fine focus'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0793
_diffrn_reflns_av_unetI/netI     0.0492
_diffrn_reflns_limit_h_max       0
_diffrn_reflns_limit_h_min       -8
_diffrn_reflns_limit_k_max       15
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       18
_diffrn_reflns_limit_l_min       -18
_diffrn_reflns_number            2250
_diffrn_reflns_theta_full        27.49
_diffrn_reflns_theta_max         27.49
_diffrn_reflns_theta_min         2.82
_exptl_absorpt_coefficient_mu    51.26
_exptl_absorpt_correction_type   none
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    6.293
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       needle
_exptl_crystal_F_000             1656
_exptl_crystal_size_max          0.09
_exptl_crystal_size_mid          0.08
_exptl_crystal_size_min          0.08
_refine_diff_density_max         2.594
_refine_diff_density_min         -2.09
_refine_diff_density_rms         0.457
_refine_ls_extinction_coef       0.00093(8)
_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   1.064
_refine_ls_hydrogen_treatment    noref
_refine_ls_matrix_type           full
_refine_ls_number_parameters     25
_refine_ls_number_reflns         632
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.064
_refine_ls_R_factor_all          0.0512
_refine_ls_R_factor_gt           0.0403
_refine_ls_shift/su_max          0
_refine_ls_shift/su_mean         0
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0395P)^2^+12.3925P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0825
_refine_ls_wR_factor_ref         0.0892
_reflns_number_gt                503
_reflns_number_total             632
_reflns_threshold_expression     >2\s(I)
_cod_data_source_file            cm504089r_si_001.cif
_cod_data_source_block           struct
_cod_database_code               4002165