Charge ordering, symmetry and electronic structure issues and Wigner crystal structure of the quarter-filled band Mott insulators and high pressure metals δ-(EDT-TTF-CONMe2)2X, X = Br and AsF6
Zorina, Leokadiya; Simonov, Sergey; Mézière, Cécile; Canadell, Enric; Suh, Steve; Brown, Stuart E.; Foury-Leylekian, Pascale; Fertey, Pierre; Pouget, Jean-Paul; Batail, Patrick; Journal of Materials Chemistry 19 (2009) 6980–; doi:10.1039/b906287d

data_7201236
_publ_section_title
;
 Charge ordering, symmetry and electronic structure issues and Wigner
 crystal structure of the quarter-filled band Mott insulators and high
 pressure metals \d-(EDT-TTF-CONMe2)2X, X = Br and AsF6
;
_journal_issue                   38
_journal_name_full               'Journal of Materials Chemistry'
_journal_page_first              6980
_journal_paper_doi               10.1039/b906287d
_journal_volume                  19
_journal_year                    2009
_chemical_compound_source        'synthesis as described'
_chemical_formula_moiety         '2(C11 H11 N O S6), As F6'
_chemical_formula_sum            'C22 H22 As F6 N2 O2 S12'
_chemical_formula_weight         920.06
_chemical_name_systematic
;
?
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2ac'
_symmetry_space_group_name_H-M   'P 1 1 21/a'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method
;
CrysAlis RED (Oxford Diffraction Ltd.),
SHELXL-97 and WinGX routine-INITIALISE
;
_cell_angle_alpha                90.00
_cell_angle_beta                 90.00
_cell_angle_gamma                92.255(13)
_cell_formula_units_Z            2
_cell_length_a                   7.0157(8)
_cell_length_b                   6.4219(13)
_cell_length_c                   35.465(5)
_cell_measurement_reflns_used    90
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      28
_cell_measurement_theta_min      3
_cell_volume                     1596.6(4)
_computing_cell_refinement
'Dirax/lsq (Duisenberg & Schreurs, 1989-2000)'
_computing_data_collection       'Collect (Nonius BV, 1997-2000)'
_computing_data_reduction        'EvalCCD (Duisenberg & Schreurs 1990-2000)'
_computing_molecular_graphics    'DIAMOND 3.1 (Crystal Impact GbR 2005)'
_computing_publication_material  'WinGX publication routines (Farrugia, 1999)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'Direct methods (Sir92,Altomare et al.,1993)'
_diffrn_ambient_temperature      100(2)
_diffrn_detector_area_resol_mean 9
_diffrn_measured_fraction_theta_full 0.996
_diffrn_measured_fraction_theta_max 0.973
_diffrn_measurement_device       '\k-geometry diffractometer'
_diffrn_measurement_device_type  'Bruker Nonius KappaCCD'
_diffrn_measurement_method       'combined \f and \w-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  0.0000
_diffrn_reflns_av_sigmaI/netI    0.0876
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -10
_diffrn_reflns_limit_k_max       9
_diffrn_reflns_limit_k_min       -9
_diffrn_reflns_limit_l_max       52
_diffrn_reflns_limit_l_min       -52
_diffrn_reflns_number            46120
_diffrn_reflns_theta_full        26.00
_diffrn_reflns_theta_max         32.07
_diffrn_reflns_theta_min         3.12
_diffrn_standards_decay_%        0
_exptl_absorpt_coefficient_mu    1.915
_exptl_absorpt_correction_T_max  0.9152
_exptl_absorpt_correction_T_min  0.7476
_exptl_absorpt_correction_type   analytical
_exptl_absorpt_process_details
'see N.W. Alcock (1970). Cryst. Computing, p.271'
_exptl_crystal_colour            black
_exptl_crystal_density_diffrn    1.914
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prism
_exptl_crystal_F_000             926
_exptl_crystal_size_max          0.228
_exptl_crystal_size_mid          0.052
_exptl_crystal_size_min          0.050
_refine_diff_density_max         1.747
_refine_diff_density_min         -0.909
_refine_diff_density_rms         0.202
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.012
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     208
_refine_ls_number_reflns         46120
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.012
_refine_ls_R_factor_all          0.1471
_refine_ls_R_factor_gt           0.0784
_refine_ls_shift/su_max          0.005
_refine_ls_shift/su_mean         0.001
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.1073P)^2^+4.8322P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1832
_refine_ls_wR_factor_ref         0.2160
_reflns_number_gt                28241
_reflns_number_total             46120
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            b906287d.txt
_cod_data_source_block           delta-(EDT-TTF-CONMe2)2AsF6_(P21/a,100K)
_cod_database_code               7201236