Arsenic-Containing Chalcophosphate Molecular Anions
Collin D. Morris; Mercouri G. Kanatzidis; Inorganic Chemistry 49 (2010) 9049–9054; doi:10.1021/ic101461w

data_4316677
_publ_contact_author
;
      Prof. M. G. Kanatzidis
      Department of Chemistry
      2145 Sheridan Road
      Northwestern University
      Evanston, IL 60208-3113
      USA
;
_publ_contact_author_email       m-kanatzidis@northwestern.edu
_publ_contact_author_fax         'Int + 847-491-5937'
_publ_contact_author_phone       'Int + 847-467-1541'
_publ_section_title
;
 Arsenic-Containing Chalcophosphate Molecular Anions
;
_journal_name_full               'Inorganic Chemistry'
_journal_page_first              9049
_journal_page_last               9054
_journal_paper_doi               10.1021/ic101461w
_journal_volume                  49
_journal_year                    2010
_chemical_formula_moiety         'As P3 Se9, 3(K)'
_chemical_formula_sum            'As2 K6 P6 Se18'
_chemical_formula_weight         1991.54
_chemical_name_systematic
; 
 ? 
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 1'
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 124.809(4)
_cell_angle_gamma                90.00
_cell_formula_units_Z            2
_cell_length_a                   8.0898(5)
_cell_length_b                   23.3142(18)
_cell_length_c                   12.1919(7)
_cell_measurement_reflns_used    7042
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      29.41
_cell_measurement_theta_min      3.32
_cell_volume                     1888.0(2)
_computing_cell_refinement       'STOE X-AREA'
_computing_data_collection       'STOE X-AREA'
_computing_data_reduction        'STOE X-RED'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      100(2)
_diffrn_detector_area_resol_mean 6.67
_diffrn_measured_fraction_theta_full 0.979
_diffrn_measured_fraction_theta_max 0.979
_diffrn_measurement_device_type  'STOE IPDS 2T'
_diffrn_measurement_method       rotation
_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  0.0678
_diffrn_reflns_av_sigmaI/netI    0.0683
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       31
_diffrn_reflns_limit_k_min       -31
_diffrn_reflns_limit_l_max       16
_diffrn_reflns_limit_l_min       -14
_diffrn_reflns_number            15753
_diffrn_reflns_theta_full        29.33
_diffrn_reflns_theta_max         29.33
_diffrn_reflns_theta_min         3.42
_exptl_absorpt_coefficient_mu    20.040
_exptl_absorpt_correction_T_max  0.5322
_exptl_absorpt_correction_T_min  0.2428
_exptl_absorpt_correction_type   numerical
_exptl_crystal_colour            orange
_exptl_crystal_density_diffrn    3.503
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             1764
_exptl_crystal_size_max          0.50
_exptl_crystal_size_mid          0.50
_exptl_crystal_size_min          0.20
_refine_diff_density_max         1.007
_refine_diff_density_min         -1.229
_refine_diff_density_rms         0.194
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.108
_refine_ls_matrix_type           full
_refine_ls_number_parameters     145
_refine_ls_number_reflns         5057
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.108
_refine_ls_R_factor_all          0.1043
_refine_ls_R_factor_gt           0.0634
_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^)+(0.0257P)^2^+6.9657P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0874
_refine_ls_wR_factor_ref         0.0959
_reflns_number_gt                3537
_reflns_number_total             5057
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ic101461w_si_001_2.cif
_cod_data_source_block           K6As2P6Se18
_cod_database_code               4316677