#------------------------------------------------------------------------------
#$Date: 2019-11-03 16:56:45 +0100 (dom 03 de nov de 2019) $
#$Revision: 222005 $
#$URL: svn://www.crystallography.net/cod/cif/4/12/89/4128979.cif $
#------------------------------------------------------------------------------
#
# This file is available in the Crystallography Open Database (COD),
# http://www.crystallography.net/
#
# All data on this site have been placed in the public domain by the
# contributors.
#
data_4128979
loop_
_publ_author_name
'Cai, Weizhao'
'Lin, Wenwen'
'Li, Long-Hua'
'Malliakas, Christos D.'
'Zhang, Rong'
'Groesbeck, Matthew'
'Bao, Jin-Ke'
'Zhang, Dongzhou'
'Sterer, Eran'
'Kanatzidis, Mercouri G.'
'Deemyad, Shanti'
_publ_section_title
;
 Pressure-Induced Superconductivity and Flattened Se₆ Rings in
 the Wide Band Gap Semiconductor
 Cu₂I₂Se₆.
;
_journal_issue                   38
_journal_name_full               'Journal of the American Chemical Society'
_journal_page_first              15174
_journal_page_last               15182
_journal_paper_doi               10.1021/jacs.9b06794
_journal_volume                  141
_journal_year                    2019
_chemical_formula_moiety         'Cu2 I2 Se6'
_chemical_formula_sum            'Cu2 I2 Se6'
_chemical_formula_weight         854.7
_chemical_name_common            'copper iodide triselenide'
_space_group_IT_number           166
_space_group_name_Hall           '-R 3 2"'
_space_group_name_H-M_alt        'R -3 m :H'
_symmetry_cell_setting           trigonal
_symmetry_Int_Tables_number      166
_symmetry_space_group_name_Hall  '-R 3 2"'
_symmetry_space_group_name_H-M   'R -3 m :H'
_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                120.00
_cell_formula_units_Z            9
_cell_length_a                   12.9856(3)
_cell_length_b                   12.9856(3)
_cell_length_c                   12.4479(10)
_cell_measurement_pressure       14400000
_cell_measurement_reflns_used    1452
_cell_measurement_temperature    296(2)
_cell_measurement_theta_max      20.74
_cell_measurement_theta_min      1.91
_cell_volume                     1817.82(16)
_computing_molecular_graphics    'Mercury (Macrae et al., 2008)'
_computing_publication_material  'SHELXL-97 (Sheldrick, 2008)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      296(2)
_diffrn_measured_fraction_theta_full 0.351
_diffrn_measured_fraction_theta_max 0.351
_diffrn_measurement_device_type  'MAR165 CCD'
_diffrn_radiation_monochromator  silicon(311)
_diffrn_radiation_type           synchrotron
_diffrn_radiation_wavelength     0.43250
_diffrn_reflns_av_R_equivalents  0.0713
_diffrn_reflns_av_sigmaI/netI    0.0358
_diffrn_reflns_limit_h_max       20
_diffrn_reflns_limit_h_min       -12
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       -15
_diffrn_reflns_limit_l_max       14
_diffrn_reflns_limit_l_min       -12
_diffrn_reflns_number            1452
_diffrn_reflns_theta_full        20.74
_diffrn_reflns_theta_max         20.74
_diffrn_reflns_theta_min         1.91
_diffrn_source                   'Advanced Photon Source 13-BM-C'
_exptl_absorpt_coefficient_mu    21.052
_exptl_absorpt_correction_T_max  0.7430
_exptl_absorpt_correction_T_min  0.5261
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details
;
Dera, P. et al. High pressure single-crystal micro X-ray diffraction analysis with GSE_ADA/RSV software. High Pressure Research 33, 466-484 (2013).
;
_exptl_crystal_colour            'dark red'
_exptl_crystal_density_diffrn    7.026
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       plate-shaped
_exptl_crystal_F_000             3312
_exptl_crystal_size_max          0.035
_exptl_crystal_size_mid          0.024
_exptl_crystal_size_min          0.015
_refine_diff_density_max         1.630
_refine_diff_density_min         -1.601
_refine_diff_density_rms         0.326
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.131
_refine_ls_matrix_type           full
_refine_ls_number_parameters     35
_refine_ls_number_reflns         362
_refine_ls_number_restraints     13
_refine_ls_restrained_S_all      1.121
_refine_ls_R_factor_all          0.0330
_refine_ls_R_factor_gt           0.0320
_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/[σ²(Fo²)+(0.0473P)²+100.0684P] where P=(Fo²+2Fc²)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0890
_refine_ls_wR_factor_ref         0.0895
_reflns_number_gt                361
_reflns_number_total             362
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja9b06794_si_002.cif
_cod_data_source_block           at14.4GPa
_cod_depositor_comments
;
The following automatic conversions were performed:

data name '_atom_site_symetry_multiplicity' was replaced with
'_atom_site_symmetry_multiplicity' as specified in the replacement
file
'/home/data/users/saulius/crontab/automatic-downloads/current/ACS/lib/lists/replacement-tags.lst'.

Automatic conversion script
Id: cif_correct_tags 6909 2019-04-08 15:41:33Z antanas 
;
_cod_original_sg_symbol_H-M      'R -3 m'
_cod_database_code               4128979
loop_
_symmetry_equiv_pos_as_xyz
'x, y, z'
'-y, x-y, z'
'-x+y, -x, z'
'y, x, -z'
'x-y, -y, -z'
'-x, -x+y, -z'
'x+2/3, y+1/3, z+1/3'
'-y+2/3, x-y+1/3, z+1/3'
'-x+y+2/3, -x+1/3, z+1/3'
'y+2/3, x+1/3, -z+1/3'
'x-y+2/3, -y+1/3, -z+1/3'
'-x+2/3, -x+y+1/3, -z+1/3'
'x+1/3, y+2/3, z+2/3'
'-y+1/3, x-y+2/3, z+2/3'
'-x+y+1/3, -x+2/3, z+2/3'
'y+1/3, x+2/3, -z+2/3'
'x-y+1/3, -y+2/3, -z+2/3'
'-x+1/3, -x+y+2/3, -z+2/3'
'-x, -y, -z'
'y, -x+y, -z'
'x-y, x, -z'
'-y, -x, z'
'-x+y, y, z'
'x, x-y, z'
'-x+2/3, -y+1/3, -z+1/3'
'y+2/3, -x+y+1/3, -z+1/3'
'x-y+2/3, x+1/3, -z+1/3'
'-y+2/3, -x+1/3, z+1/3'
'-x+y+2/3, y+1/3, z+1/3'
'x+2/3, x-y+1/3, z+1/3'
'-x+1/3, -y+2/3, -z+2/3'
'y+1/3, -x+y+2/3, -z+2/3'
'x-y+1/3, x+2/3, -z+2/3'
'-y+1/3, -x+2/3, z+2/3'
'-x+y+1/3, y+2/3, z+2/3'
'x+1/3, x-y+2/3, z+2/3'
loop_
_atom_site_label
_atom_site_type_symbol
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_U_iso_or_equiv
_atom_site_adp_type
_atom_site_occupancy
_atom_site_symmetry_multiplicity
_atom_site_calc_flag
_atom_site_refinement_flags
_atom_site_disorder_group
Se1 Se 0.24452(6) 0.75548(6) 0.11724(11) 0.0139(3) Uani 1 2 d S .
Se2 Se 0.09146(6) 0.90854(6) 0.09912(11) 0.0148(3) Uani 1 2 d S .
Se3 Se -0.09155(6) 0.81690(12) 0.18837(11) 0.0150(3) Uani 1 2 d S .
I1 I 0.32480(7) 0.99146(7) 0.3333 0.0197(3) Uani 1 2 d S .
Cu1 Cu 0.16127(11) 0.83873(11) 0.2308(2) 0.0170(5) Uani 0.669(3) 2 d SPU 1
Cu2 Cu 0.0000 1.0000 0.3129(3) 0.0276(8) Uani 0.992(8) 6 d SPU 2
loop_
_atom_site_aniso_label
_atom_site_aniso_U_11
_atom_site_aniso_U_22
_atom_site_aniso_U_33
_atom_site_aniso_U_23
_atom_site_aniso_U_13
_atom_site_aniso_U_12
Se1 0.0103(4) 0.0103(4) 0.0203(8) 0.0014(2) -0.0014(2) 0.0046(4)
Se2 0.0109(4) 0.0109(4) 0.0193(8) -0.0017(2) 0.0017(2) 0.0029(4)
Se3 0.0119(4) 0.0133(6) 0.0204(8) 0.0046(5) 0.0023(3) 0.0066(3)
I1 0.0126(3) 0.0126(3) 0.0354(6) -0.00280(18) 0.00280(18) 0.0072(3)
Cu1 0.0163(6) 0.0163(6) 0.0185(10) 0.0013(4) -0.0013(4) 0.0083(7)
Cu2 0.0281(8) 0.0281(8) 0.0267(12) 0.000 0.000 0.0141(4)
loop_
_atom_type_symbol
_atom_type_description
_atom_type_scat_dispersion_real
_atom_type_scat_dispersion_imag
_atom_type_scat_source
Cu Cu 0.3240 0.8257 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4'
Se Se 0.2367 1.4831 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4'
I I -0.8919 1.1868 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4'
loop_
_geom_angle_atom_site_label_1
_geom_angle_atom_site_label_2
_geom_angle_atom_site_label_3
_geom_angle
_geom_angle_site_symmetry_1
_geom_angle_site_symmetry_3
Cu1 Se1 Se1 91.35(7) . 26_455
Cu1 Se1 Se1 91.35(7) . 27
Se1 Se1 Se1 95.01(8) 26_455 27
Cu1 Se1 Cu2 176.43(11) . 13_544
Se1 Se1 Cu2 91.06(6) 26_455 13_544
Se1 Se1 Cu2 91.06(5) 27 13_544
Cu1 Se2 Se3 87.75(7) . 2_675
Cu1 Se2 Se3 87.75(7) . .
Se3 Se2 Se3 99.36(8) 2_675 .
Se2 Se3 Se2 99.24(8) 3_465 .
Se2 Se3 Cu2 86.20(6) 3_465 .
Se2 Se3 Cu2 86.20(6) . .
Cu1 I1 Cu1 63.94(11) 31_565 .
Se2 Cu1 Se1 96.70(11) . .
Se2 Cu1 I1 114.55(7) . 31_565
Se1 Cu1 I1 106.12(7) . 31_565
Se2 Cu1 I1 114.54(7) . .
Se1 Cu1 I1 106.12(7) . .
I1 Cu1 I1 116.06(11) 31_565 .
Se2 Cu1 Cu1 141.68(18) . 31_565
Se1 Cu1 Cu1 121.62(16) . 31_565
I1 Cu1 Cu1 58.03(5) 31_565 31_565
I1 Cu1 Cu1 58.03(5) . 31_565
Se3 Cu2 Se3 87.56(11) . 3_465
Se3 Cu2 Se3 87.56(11) . 2_675
Se3 Cu2 Se3 87.56(11) 3_465 2_675
Se3 Cu2 Se1 134.012(18) . 9_465
Se3 Cu2 Se1 134.010(18) 3_465 9_465
Se3 Cu2 Se1 77.60(4) 2_675 9_465
Se3 Cu2 Se1 77.60(4) . 8_565
Se3 Cu2 Se1 134.010(18) 3_465 8_565
Se3 Cu2 Se1 134.012(18) 2_675 8_565
Se1 Cu2 Se1 82.18(11) 9_465 8_565
Se3 Cu2 Se1 134.011(18) . 7_455
Se3 Cu2 Se1 77.60(4) 3_465 7_455
Se3 Cu2 Se1 134.011(18) 2_675 7_455
Se1 Cu2 Se1 82.18(11) 9_465 7_455
Se1 Cu2 Se1 82.18(11) 8_565 7_455
loop_
_geom_bond_atom_site_label_1
_geom_bond_atom_site_label_2
_geom_bond_distance
_geom_bond_site_symmetry_2
Se1 Cu1 2.347(3) .
Se1 Se1 2.3461(18) 26_455
Se1 Se1 2.3461(18) 27
Se1 Cu2 2.632(3) 13_544
Se2 Cu1 2.270(3) .
Se2 Se3 2.3388(13) 2_675
Se2 Se3 2.3388(13) .
Se3 Se2 2.3388(13) 3_465
Se3 Cu2 2.577(3) .
I1 Cu1 2.4205(16) 31_565
I1 Cu1 2.4205(16) .
Cu1 I1 2.4205(16) 31_565
Cu1 Cu1 2.563(5) 31_565
Cu2 Se3 2.577(3) 3_465
Cu2 Se3 2.577(3) 2_675
Cu2 Se1 2.632(3) 9_465
Cu2 Se1 2.632(3) 8_565
Cu2 Se1 2.632(3) 7_455
