Eu3(AsS4)2 and AxEu(3-y)As(5-z)S10 (A = Li, Na): compounds with simple and complex thioarsenate building blocks.
Bera, Tarun K.; Iyer, Ratnasabapathy G.; Malliakas, Christos D.; Kanatzidis, Mercouri G.; Inorganic chemistry 46 (2007) 8466–8468; doi:10.1021/ic701067r

data_4339534
_publ_section_title
;
 Eu3(AsS4)2 and AxEu(3-y)As(5-z)S10 (A = Li, Na): compounds with simple
 and complex thioarsenate building blocks.
;
_journal_issue                   21
_journal_name_full               'Inorganic chemistry'
_journal_page_first              8466
_journal_page_last               8468
_journal_paper_doi               10.1021/ic701067r
_journal_volume                  46
_journal_year                    2007
_chemical_formula_sum            'As4.54 Eu2.86 Na0.66 S10'
_chemical_formula_weight         1110.08
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           14
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/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                 100.226(6)
_cell_angle_gamma                90.00
_cell_formula_units_Z            4
_cell_length_a                   8.4300(6)
_cell_length_b                   7.8040(4)
_cell_length_c                   25.139(2)
_cell_measurement_temperature    293(2)
_cell_volume                     1627.6(2)
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      293(2)
_diffrn_measured_fraction_theta_full 0.976
_diffrn_measured_fraction_theta_max 0.976
_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  0.0730
_diffrn_reflns_av_sigmaI/netI    0.0514
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       -10
_diffrn_reflns_limit_l_max       34
_diffrn_reflns_limit_l_min       -34
_diffrn_reflns_number            14682
_diffrn_reflns_theta_full        29.31
_diffrn_reflns_theta_max         29.31
_diffrn_reflns_theta_min         2.45
_exptl_absorpt_coefficient_mu    21.313
_exptl_crystal_density_diffrn    4.530
_exptl_crystal_density_method    'not measured'
_exptl_crystal_F_000             1988
_refine_diff_density_max         5.041
_refine_diff_density_min         -2.917
_refine_diff_density_rms         0.430
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.088
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     171
_refine_ls_number_reflns         4512
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.088
_refine_ls_R_factor_all          0.0568
_refine_ls_R_factor_gt           0.0449
_refine_ls_shift/su_max          0.001
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0281P)^2^+58.6594P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0981
_refine_ls_wR_factor_ref         0.1056
_reflns_number_gt                3894
_reflns_number_total             4512
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ic701067r-file003.cif
_cod_data_source_block           eu3as5s10
_cod_original_cell_volume        1627.59(19)
_cod_database_code               4339534