Ba2Ti2Fe2As4O: A New Superconductor Containing Fe2As2 Layers and Ti2O Sheets
Yun-Lei Sun; Hao Jiang; Hui-Fei Zhai; Jin-Ke Bao; Wen-He Jiao; Qian Tao; Chen-Yi Shen; Yue-Wu Zeng; Zhu-An Xu; Guang-Han Cao; Journal of the American Chemical Society 134 (2012) 12893–12896; doi:10.1021/ja304315e

data_4118469
_publ_contact_author_email       ghcao@zju.edu.cn
_publ_contact_author_fax         +86-571-87952590
_publ_contact_author_name        'Guang-Han Cao'
_publ_contact_author_phone       +86-571-87952590
_publ_section_title
;
 Ba2Ti2Fe2As4O: A New Superconductor Containing Fe2As2 Layers and Ti2O
 Sheets
;
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              12893
_journal_page_last               12896
_journal_paper_doi               10.1021/ja304315e
_journal_volume                  134
_journal_year                    2012
_chemical_formula_sum            'As4 Ba2 Fe2 O Ti2'
_space_group_IT_number           139
_symmetry_cell_setting           tetragonal
_symmetry_Int_Tables_number      139
_symmetry_space_group_name_Hall  '-I 4 2'
_symmetry_space_group_name_H-M   'I 4/m m m'
_audit_creation_date             2012-05-04
_audit_creation_method           'Converted from *.lst using lst2cif'
_cell_angle_alpha                90.0
_cell_angle_beta                 90.0
_cell_angle_gamma                90.0
_cell_formula_units_Z            2
_cell_length_a                   4.0276(1)
_cell_length_b                   4.02761
_cell_length_c                   27.3441(4)
_cell_volume                     443.565(13)
_diffrn_ambient_environment      air
_diffrn_ambient_temperature      298
_diffrn_detector                 'scintillation detector'
_diffrn_detector_type            NaI
_diffrn_measurement_device_type  'RIGAKU D/Max-rA'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_type           'Cu K_alpha1, K_alpha2'
_diffrn_radiation_wavelength     1.541786
_diffrn_source                   'x-ray tube'
_diffrn_source_target            Cu
_diffrn_source_type              'Cu K_alpha'
_pd_block_id
2012-05-04|PHASE_01|..creator_name..|..instr_name..
_pd_calc_method                  'Rietveld Refinement'
_pd_meas_2theta_range_inc        0.020
_pd_meas_2theta_range_max        120.000
_pd_meas_2theta_range_min        10.000
_pd_meas_number_of_points        5501
_pd_meas_scan_method             step
_pd_phase_name                   Ba2Ti2Fe2As4O
_pd_proc_ls_background_function  polynomial
_pd_proc_ls_profile_function     'Pseudo-Voigt function of Thompson et al.'
_pd_proc_ls_prof_R_factor        0.043
_pd_proc_ls_prof_wR_expected     0.043
_pd_proc_ls_prof_wR_factor       0.060
_refine_ls_extinction_coef       unknown
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_all   1.40
_refine_ls_hydrogen_treatment    noref
_refine_ls_matrix_type           unknown
_refine_ls_number_constraints    0
_refine_ls_number_parameters     33
_refine_ls_structure_factor_coef Inet
_cod_data_source_file            ja304315e_si_001.cif
_cod_data_source_block           RIETAN_phase_1
_cod_original_cell_volume        443.57(2)
_cod_original_formula_sum        'Ba2 Ti2 Fe2 As4 O'
_cod_database_code               4118469