#------------------------------------------------------------------------------
#$Date: 2019-11-03 16:56:45 +0100 (dom 03 de nov de 2019) $
#$Revision: 222005 $
#$URL: svn://www.crystallography.net/cod/cif/4/12/89/4128974.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_4128974
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                   14.0310(3)
_cell_length_b                   14.0310(3)
_cell_length_c                   14.0046(9)
_cell_measurement_pressure       200000
_cell_measurement_reflns_used    1851
_cell_measurement_temperature    296(2)
_cell_measurement_theta_max      20.61
_cell_measurement_theta_min      1.77
_cell_volume                     2387.69(17)
_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 0.371
_diffrn_measured_fraction_theta_max 0.371
_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  0.1066
_diffrn_reflns_av_sigmaI/netI    0.2320
_diffrn_reflns_limit_h_max       12
_diffrn_reflns_limit_h_min       -16
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       -16
_diffrn_reflns_limit_l_max       16
_diffrn_reflns_limit_l_min       -14
_diffrn_reflns_number            1851
_diffrn_reflns_theta_full        20.61
_diffrn_reflns_theta_max         20.61
_diffrn_reflns_theta_min         1.77
_diffrn_source                   'Advanced Photon Source 13-BM-C'
_exptl_absorpt_coefficient_mu    16.027
_exptl_absorpt_correction_T_max  0.7950
_exptl_absorpt_correction_T_min  0.6039
_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    5.349
_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         1.716
_refine_diff_density_min         -1.866
_refine_diff_density_rms         0.405
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.784
_refine_ls_matrix_type           full
_refine_ls_number_parameters     30
_refine_ls_number_reflns         491
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      0.784
_refine_ls_R_factor_all          0.0638
_refine_ls_R_factor_gt           0.0496
_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)+(0.0214P)²+0.0000P] where P=(Fo²+2Fc²)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0895
_refine_ls_wR_factor_ref         0.0907
_reflns_number_gt                225
_reflns_number_total             491
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ja9b06794_si_002.cif
_cod_data_source_block           at0.2GPa
_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               4128974
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
Se1 Se 0.24746(9) 0.75254(9) 0.1250(2) 0.0157(7) Uani 1 2 d S
Se2 Se 0.08579(11) 0.91421(11) 0.1163(2) 0.0173(6) Uani 1 2 d S
Se3 Se -0.08750(11) 0.8250(2) 0.1933(2) 0.0213(7) Uani 1 2 d S
I1 I 0.32061(12) 0.98728(12) 0.3333 0.0228(5) Uani 1 2 d S
Cu1 Cu 0.16437(15) 0.83563(15) 0.2260(3) 0.0280(9) Uani 1 2 d S
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 0.0143(10) 0.0143(10) 0.0218(19) 0.0000(6) 0.0000(6) 0.0095(12)
Se2 0.0140(8) 0.0140(8) 0.0261(18) -0.0005(6) 0.0005(6) 0.0087(10)
Se3 0.0171(10) 0.0176(13) 0.029(2) 0.0047(14) 0.0024(7) 0.0088(6)
I1 0.0191(7) 0.0191(7) 0.0290(12) -0.0010(4) 0.0010(4) 0.0086(8)
Cu1 0.0223(12) 0.0223(12) 0.041(3) -0.0001(9) 0.0001(9) 0.0127(13)
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
Se1 Se1 Se1 98.16(15) 26_455 27
Se1 Se1 Cu1 94.41(13) 26_455 .
Se1 Se1 Cu1 94.41(13) 27 .
Se3 Se2 Se3 102.22(19) 2_675 .
Se3 Se2 Cu1 92.90(12) 2_675 .
Se3 Se2 Cu1 92.90(12) . .
Se2 Se3 Se2 99.48(17) . 3_465
Cu1 I1 Cu1 69.70(15) 31_565 .
Se2 Cu1 Se1 106.15(17) . .
Se2 Cu1 I1 112.00(9) . 31_565
Se1 Cu1 I1 108.08(10) . 31_565
Se2 Cu1 I1 112.00(9) . .
Se1 Cu1 I1 108.08(10) . .
I1 Cu1 I1 110.30(15) 31_565 .
Se2 Cu1 Cu1 131.0(2) . 31_565
Se1 Cu1 Cu1 122.9(2) . 31_565
I1 Cu1 Cu1 55.15(7) 31_565 31_565
I1 Cu1 Cu1 55.15(7) . 31_565
loop_
_geom_bond_atom_site_label_1
_geom_bond_atom_site_label_2
_geom_bond_distance
_geom_bond_site_symmetry_2
Se1 Se1 2.392(3) 26_455
Se1 Se1 2.392(3) 27
Se1 Cu1 2.466(4) .
Se2 Se3 2.366(3) 2_675
Se2 Se3 2.366(3) .
Se2 Cu1 2.451(5) .
Se3 Se2 2.366(3) 3_465
I1 Cu1 2.632(3) 31_565
I1 Cu1 2.632(3) .
Cu1 I1 2.632(3) 31_565
Cu1 Cu1 3.008(8) 31_565
