Synthesis, electronic structure and physical properties of two new layered compounds, EuFAgSe and EuFAg<sub>1-δ</sub>Te, featuring the active redox pair Eu<sup>2+</sup>/Ag<sup/>.
Plokhikh, Igor V.; Tsirlin, Alexander A.; Heletta, Lukas; Klenner, Steffen; Charkin, Dmitri O.; Kuznetsov, Alexey N.; Shevelkov, Andrei V.; Pöttgen, Rainer; Pfitzner, Arno; Dalton transactions (Cambridge, England : 2003) 49 (2020) 7426–7435; doi:10.1039/d0dt01504k

data_7704393
_publ_section_title
;
 Synthesis, electronic structure and physical properties of two new
 layered compounds, EuFAgSe and EuFAg<sub>1-\d</sub>Te, featuring the
 active redox pair Eu<sup>2+</sup>/Ag<sup/>.
;
_journal_issue                   22
_journal_name_full
'Dalton transactions (Cambridge, England : 2003)'
_journal_page_first              7426
_journal_page_last               7435
_journal_paper_doi               10.1039/d0dt01504k
_journal_volume                  49
_journal_year                    2020
_chemical_compound_source        'solid state reaction'
_chemical_formula_moiety         EuAgSeF
_chemical_formula_sum            'Ag Eu F Se'
_chemical_formula_weight         357.791
_chemical_melting_point          580
_chemical_name_common            EuAgSeF
_chemical_name_systematic        EuAgSeF
_chemical_properties_physical    'paramagnetic, photo-sensitive'
_space_group_IT_number           129
_space_group_name_Hall           '-P 4a 2a'
_space_group_name_H-M_alt        'P 4/n m m :2'
_symmetry_cell_setting           tetragonal
_symmetry_Int_Tables_number      129
_symmetry_space_group_name_Hall  '-P 4a 2a'
_symmetry_space_group_name_H-M   'P 4/n m m :2'
_audit_update_record
;
2020-02-12 deposited with the CCDC.	2020-05-12 downloaded from the CCDC.
;
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            2
_cell_length_a                   4.15427(3)
_cell_length_b                   4.15427(3)
_cell_length_c                   9.21830(10)
_cell_measurement_temperature    293
_cell_volume                     159.089(2)
_diffrn_ambient_pressure         100
_diffrn_ambient_temperature      293
_diffrn_measurement_device_type  'X-ray powder diffractometer'
_diffrn_radiation_probe          x-ray
_diffrn_radiation_type           'Mo K\a~1~'
_diffrn_radiation_wavelength     0.7093
_diffrn_source                   'sealed X-ray tube'
_diffrn_source_type              'STOE STADI P'
_exptl_absorpt_coefficient_mu    36.504
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    7.4172
_exptl_crystal_description       powder
_exptl_crystal_F_000             388
_pd_instr_location               ' ?'
_pd_meas_2theta_range_inc        0.015
_pd_meas_2theta_range_max        74.635
_pd_meas_2theta_range_min        4.000
_pd_meas_number_of_points        4710
_pd_proc_2theta_range_inc        0.015
_pd_proc_2theta_range_max        74.635
_pd_proc_2theta_range_min        4
_pd_proc_ls_background_function
'Manual background combined with 5 Legendre polynoms'
_pd_proc_ls_pref_orient_corr     'March & Dollase'
_pd_proc_ls_profile_function     Pseudo-Voigt
_pd_proc_ls_prof_R_factor        0.0217
_pd_proc_ls_prof_wR_expected     0.0149
_pd_proc_ls_prof_wR_factor       0.0304
_refine_diff_density_max         2.37
_refine_diff_density_min         -2.82
_refine_ls_goodness_of_fit_all   2.04
_refine_ls_number_constraints    0
_refine_ls_number_parameters     29
_refine_ls_number_restraints     0
_refine_ls_R_factor_all          0.0276
_refine_ls_R_factor_gt           0.0219
_refine_ls_shift/su_max          0.0488
_refine_ls_shift/su_mean         0.0199
_refine_ls_weighting_scheme      sigma
_refine_ls_wR_factor_all         0.0253
_refine_ls_wR_factor_gt          0.0241
_cod_data_source_file            d0dt01504k2.cif
_cod_data_source_block           I
_cod_depositor_comments
'Adding full bibliography for 7704393--7704394.cif.'
_cod_original_sg_symbol_Hall     '-P 4a;-2a'
_cod_original_sg_symbol_H-M      'P 4/n m m'
_cod_original_formula_sum        'Eu F Ag Se'
_cod_database_code               7704393