Zintl phase as dopant source in the flux synthesis of Ba(1-x)K(x)Fe(2)As(2) type superconductors.
Mathieu, Josiah L; Latturner, Susan E; Chemical communications (Cambridge, England) 34 (2009) 4965–4967; doi:10.1039/b910749e

data_7104684
_publ_section_title
;
 Zintl phase as dopant source in the flux synthesis of
 Ba(1-x)K(x)Fe(2)As(2) type superconductors.
;
_journal_issue                   33
_journal_name_full
'Chemical communications (Cambridge, England)'
_journal_page_first              4965
_journal_page_last               4967
_journal_paper_doi               10.1039/b910749e
_journal_volume                  34
_journal_year                    2009
_chemical_formula_sum            'As2 Ba0.68 Fe2 K0.24 Sn0.07'
_chemical_formula_weight         372.59
_chemical_name_systematic
;
?
;
_space_group_IT_number           139
_symmetry_cell_setting           tetragonal
_symmetry_space_group_name_Hall  '-I 4 2'
_symmetry_space_group_name_H-M   'I 4/m m m'
_atom_sites_solution_hydrogens   none
_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                90.00
_cell_formula_units_Z            2
_cell_length_a                   3.946(2)
_cell_length_b                   3.946(2)
_cell_length_c                   13.431(9)
_cell_measurement_reflns_used    125
_cell_measurement_temperature    298(2)
_cell_measurement_theta_max      32.39
_cell_measurement_theta_min      3.03
_cell_volume                     209.1(2)
_computing_cell_refinement       'Bruker APEX2'
_computing_data_collection       'Bruker APEX2'
_computing_data_reduction        'Bruker APEX2'
_computing_molecular_graphics    'Bruker SHELXTL'
_computing_publication_material  'Bruker SHELXTL'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 2008)'
_diffrn_ambient_temperature      298(2)
_diffrn_measured_fraction_theta_full 0.887
_diffrn_measured_fraction_theta_max 0.887
_diffrn_measurement_device_type  'Bruker APEX 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  0.0261
_diffrn_reflns_av_sigmaI/netI    0.0220
_diffrn_reflns_limit_h_max       5
_diffrn_reflns_limit_h_min       -5
_diffrn_reflns_limit_k_max       5
_diffrn_reflns_limit_k_min       -5
_diffrn_reflns_limit_l_max       16
_diffrn_reflns_limit_l_min       -16
_diffrn_reflns_number            609
_diffrn_reflns_theta_full        32.39
_diffrn_reflns_theta_max         32.39
_diffrn_reflns_theta_min         3.03
_exptl_absorpt_coefficient_mu    29.173
_exptl_absorpt_correction_T_max  0.747
_exptl_absorpt_correction_T_min  0.501
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details   'via SADABS (Bruker, 2000)'
_exptl_crystal_colour            silver
_exptl_crystal_density_diffrn    5.935
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate
_exptl_crystal_F_000             310
_exptl_crystal_size_max          0.03
_exptl_crystal_size_mid          0.02
_exptl_crystal_size_min          0.01
_refine_diff_density_max         2.118
_refine_diff_density_min         -1.681
_refine_diff_density_rms         0.235
_refine_ls_extinction_coef       0.0054(15)
_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   1.294
_refine_ls_hydrogen_treatment    none
_refine_ls_matrix_type           full
_refine_ls_number_parameters     13
_refine_ls_number_reflns         125
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.288
_refine_ls_R_factor_all          0.0245
_refine_ls_R_factor_gt           0.0232
_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^)+(0.0224P)^2^+1.2844P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0558
_refine_ls_wR_factor_ref         0.0563
_reflns_number_gt                117
_reflns_number_total             125
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b910749e.txt
_cod_data_source_block           'data_0m3'
_cod_original_sg_symbol_H-M      I4/mmm
_cod_database_code               7104684