#------------------------------------------------------------------------------
#$Date: 2019-12-25 21:00:32 +0200 (Wed, 25 Dec 2019) $
#$Revision: 245730 $
#$URL: file:///home/coder/svn-repositories/cod/cif/1/55/67/1556750.cif $
#------------------------------------------------------------------------------
#
# This file is available in the Crystallography Open Database (COD),
# http://www.crystallography.net/. The original data for this entry
# were provided by IUCr Journals, http://journals.iucr.org/.
#
# The file may be used within the scientific community so long as
# proper attribution is given to the journal article from which the
# data were obtained.
#
data_1556750
loop_
_publ_author_name
'Eikeland, Espen'
'Blichfeld, Anders B.'
'Borup, Kasper A.'
'Zhao, Kunpeng'
'Overgaard, Jacob'
'Shi, Xun'
'Chen, Lidong'
'Iversen, Bo B.'
_publ_section_title
;
 Crystal structure across the β to α phase transition in thermoelectric
 Cu₂₋ₓ Se.
;
_journal_coeditor_code           LC5071SUP1
_journal_issue                   'Pt 4'
_journal_name_full               IUCrJ
_journal_page_first              476
_journal_page_last               485
_journal_paper_doi               10.1107/S2052252517005553
_journal_volume                  4
_journal_year                    2017
_chemical_formula_moiety         '0.33(Cu5.83 Se3)'
_chemical_formula_sum            'Cu1.95 Se'
_chemical_formula_weight         202.86
_space_group_crystal_system      trigonal
_space_group_IT_number           166
_space_group_name_Hall           '-R 3 2"'
_space_group_name_H-M_alt        'R -3 m :H'
_audit_creation_date             2017-01-24
_audit_creation_method
;
Olex2 1.2
(compiled 2017.01.04 svn.r3372 for OlexSys, GUI svn.r5292)
;
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                120
_cell_formula_units_Z            6
_cell_length_a                   4.1323(10)
_cell_length_b                   4.1323(10)
_cell_length_c                   20.358(9)
_cell_measurement_reflns_used    246
_cell_measurement_temperature    364.97(13)
_cell_measurement_theta_max      27.0510
_cell_measurement_theta_min      2.9530
_cell_volume                     301.06(17)
_computing_cell_refinement       'CrysAlisPro 1.171.38.41 (Rigaku OD, 2015)'
_computing_data_collection       'CrysAlisPro 1.171.38.41 (Rigaku OD, 2015)'
_computing_data_reduction        'CrysAlisPro 1.171.38.41 (Rigaku OD, 2015)'
_computing_molecular_graphics    'Olex2 (Dolomanov et al., 2009)'
_computing_publication_material  'Olex2 (Dolomanov et al., 2009)'
_computing_structure_refinement  'ShelXL (Sheldrick, 2015)'
_computing_structure_solution    'ShelXT (Sheldrick, 2015)'
_diffrn_ambient_temperature      364.97(13)
_diffrn_detector_area_resol_mean 10.3590
_diffrn_detector_type            Atlas
_diffrn_measured_fraction_theta_full 1.000
_diffrn_measured_fraction_theta_max 1.000
_diffrn_measurement_details
;
List of Runs (angles in degrees, time in seconds):

  # Type    Start    End  Width  tₑₓₚ   ω     θ     κ     φ   Frames
--------------------------------------------------------------------------
  1  ω    -28.00 109.00   1.00   70.00    --   18.69  38.00 -60.00  137
  2  ω    -61.00  72.00   1.00   70.00    --  -19.62  57.00-150.00  133
  3  ω    -82.00  62.00   1.00   70.00    --   18.69 -77.00 -30.00  144
  4  ω     34.00  39.00   1.00   70.00    --   18.69-178.00-180.00    5
;
_diffrn_measurement_device       'four-circle diffractometer'
_diffrn_measurement_device_type  'SuperNova, Single source at offset, Atlas'
_diffrn_measurement_method       'ω scans'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0531
_diffrn_reflns_av_unetI/netI     0.0263
_diffrn_reflns_Laue_measured_fraction_full 1.000
_diffrn_reflns_Laue_measured_fraction_max 1.000
_diffrn_reflns_limit_h_max       5
_diffrn_reflns_limit_h_min       -4
_diffrn_reflns_limit_k_max       5
_diffrn_reflns_limit_k_min       -5
_diffrn_reflns_limit_l_max       24
_diffrn_reflns_limit_l_min       -24
_diffrn_reflns_number            772
_diffrn_reflns_point_group_measured_fraction_full 1.000
_diffrn_reflns_point_group_measured_fraction_max 1.000
_diffrn_reflns_theta_full        25.242
_diffrn_reflns_theta_max         26.203
_diffrn_reflns_theta_min         3.002
_exptl_absorpt_coefficient_mu    38.287
_exptl_absorpt_correction_T_max  1.00000
_exptl_absorpt_correction_T_min  0.20055
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
;
CrysAlisPro 1.171.38.41 (Rigaku Oxford Diffraction, 2015)
Empirical absorption correction using spherical harmonics,
 implemented in SCALE3 ABSPACK scaling algorithm.
;
_exptl_crystal_colour            'metallic grayish gray'
_exptl_crystal_colour_lustre     metallic
_exptl_crystal_colour_modifier   grayish
_exptl_crystal_colour_primary    gray
_exptl_crystal_density_diffrn    6.714
_exptl_crystal_description       irregular
_exptl_crystal_F_000             543
_exptl_crystal_size_max          0.0908
_exptl_crystal_size_mid          0.0493
_exptl_crystal_size_min          0.0167
_refine_diff_density_max         2.233
_refine_diff_density_min         -2.676
_refine_diff_density_rms         0.566
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   1.389
_refine_ls_hydrogen_treatment    undef
_refine_ls_matrix_type           full
_refine_ls_number_parameters     19
_refine_ls_number_reflns         102
_refine_ls_number_restraints     1
_refine_ls_restrained_S_all      1.384
_refine_ls_R_factor_all          0.1027
_refine_ls_R_factor_gt           0.1004
_refine_ls_shift/su_max          0.000
_refine_ls_shift/su_mean         0.000
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'w=1/[σ²(Fo²)+(0.2000P)²] where P=(Fo²+2Fc²)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.2758
_refine_ls_wR_factor_ref         0.2778
_reflns_Friedel_coverage         0.000
_reflns_number_gt                97
_reflns_number_total             102
_reflns_threshold_expression     'I > 2σ(I)'
_cod_data_source_file            lc5071.cif
_cod_data_source_block           Cu1p95Se_CVT1_365K
_cod_original_cell_volume        301.1(2)
_cod_original_sg_symbol_H-M      'R -3 m'
_cod_database_code               1556750
_shelx_shelxl_version_number     2014/7
_shelx_space_group_comment
;
The symmetry employed for this shelxl refinement is uniquely defined
by the following loop, which should always be used as a source of
symmetry information in preference to the above space-group names.
They are only intended as comments.
;
_shelx_estimated_absorpt_t_max   0.567
_shelx_estimated_absorpt_t_min   0.129
_olex2_refinement_description
;
1. Others
 1*[Sof(Cu1A)]+1*[Sof(Cu1B)]+3*[Sof(Cu2)]=1.95 with esd of 0.01
 Fixed X: Se1(0.3333) Cu1B(0.6667) Cu1A(0.6667)
 Fixed Y: Se1(0.6667) Cu1B(0.3333) Cu1A(0.3333)
;
loop_
_space_group_symop_operation_xyz
'x, y, z'
'-y, x-y, z'
'-x+y, -x, z'
'x-y, -y, -z'
'-x, -x+y, -z'
'y, x, -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'
'x-y+2/3, -y+1/3, -z+1/3'
'-x+2/3, -x+y+1/3, -z+1/3'
'y+2/3, x+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'
'x-y+1/3, -y+2/3, -z+2/3'
'-x+1/3, -x+y+2/3, -z+2/3'
'y+1/3, x+2/3, -z+2/3'
'-x, -y, -z'
'y, -x+y, -z'
'x-y, x, -z'
'-x+y, y, z'
'x, x-y, z'
'-y, -x, 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'
'-x+y+2/3, y+1/3, z+1/3'
'x+2/3, x-y+1/3, z+1/3'
'-y+2/3, -x+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'
'-x+y+1/3, y+2/3, z+2/3'
'x+1/3, x-y+2/3, z+2/3'
'-y+1/3, -x+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_site_symmetry_order
_atom_site_calc_flag
_atom_site_refinement_flags_posn
_atom_site_refinement_flags_adp
_atom_site_refinement_flags_occupancy
_atom_site_disorder_assembly
_atom_site_disorder_group
Se1 Se 0.3333 0.6667 0.42128(15) 0.0411(19) Uani 1 6 d S T P . .
Cu1B Cu 0.6667 0.3333 0.409(2) 0.094(13) Uani 0.43(4) 6 d S T P A 3
Cu2 Cu 0.387(2) 0.775(4) 0.3018(6) 0.098(7) Uani 0.329(6) 2 d S T P A 4
Cu1A Cu 0.6667 0.3333 0.4576(11) 0.074(5) Uani 0.52(4) 6 d S T P B 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 0.035(2) 0.035(2) 0.053(3) 0.000 0.000 0.0176(11)
Cu1B 0.047(5) 0.047(5) 0.19(4) 0.000 0.000 0.023(3)
Cu2 0.090(7) 0.108(14) 0.103(8) 0.048(8) 0.024(4) 0.054(7)
Cu1A 0.076(6) 0.076(6) 0.071(11) 0.000 0.000 0.038(3)
loop_
_atom_type_symbol
_atom_type_description
_atom_type_scat_dispersion_real
_atom_type_scat_dispersion_imag
_atom_type_scat_source
Cu Cu 0.3200 1.2650 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4'
Se Se -0.0930 2.2260 '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
Cu1B Se1 Cu1B 118.9(4) 1_565 1_455
Cu1B Se1 Cu1B 118.9(4) 1_565 .
Cu1B Se1 Cu1B 118.9(4) 1_455 .
Cu2 Se1 Cu2 59.7(3) 2_665 32_455
Cu2 Se1 Cu2 15.4(6) 32_455 31_565
Cu2 Se1 Cu2 71.5(3) 3_565 32_455
Cu2 Se1 Cu2 57.2(4) . 32_455
Cu2 Se1 Cu2 71.5(3) 2_665 33_655
Cu2 Se1 Cu2 15.6(6) 2_665 3_565
Cu2 Se1 Cu2 71.5(3) 3_565 31_565
Cu2 Se1 Cu2 15.6(6) . 3_565
Cu2 Se1 Cu2 100.5(4) 31_565 33_655
Cu2 Se1 Cu2 87.7(7) 32_455 33_655
Cu2 Se1 Cu2 59.7(3) 3_565 33_655
Cu2 Se1 Cu2 57.2(4) 2_665 31_565
Cu2 Se1 Cu2 15.6(6) 2_665 .
Cu2 Se1 Cu2 59.7(3) . 31_565
Cu2 Se1 Cu2 57.2(4) . 33_655
Cu1A Se1 Cu1A 72.8(5) 19_666 1_455
Cu1A Se1 Cu1A 72.8(5) 19_666 1_565
Cu1A Se1 Cu1A 111.7(5) 1_565 1_455
Se1 Cu1B Se1 118.9(4) 1_545 .
Se1 Cu1B Se1 118.9(4) 1_655 .
Se1 Cu1B Se1 118.9(4) 1_655 1_545
Se1 Cu2 Se1 120.3(3) . 31_565
Se1 Cu2 Se1 120.3(3) . 31_665
Se1 Cu2 Se1 111.6(5) 31_565 31_665
Se1 Cu2 Cu2 54.8(5) . 33_545
Se1 Cu2 Cu2 60.9(5) . 31_665
Se1 Cu2 Cu2 67.5(5) . 33
Se1 Cu2 Cu2 53.65(19) 31_565 33
Se1 Cu2 Cu2 60.9(5) . 31_565
Se1 Cu2 Cu2 53.65(19) 31_665 32
Se1 Cu2 Cu2 141.0(5) 31_665 33
Se1 Cu2 Cu2 125.87(11) 31_665 33_545
Se1 Cu2 Cu2 67.5(5) . 32
Se1 Cu2 Cu2 141.0(5) 31_565 32
Se1 Cu2 Cu2 113.3(5) 31_565 33_545
Cu2 Cu2 Se1 133.9(3) 3_565 31_565
Cu2 Cu2 Se1 151.3(10) 31_565 31_665
Cu2 Cu2 Se1 82.2(3) 3_565 .
Cu2 Cu2 Se1 82.3(3) 3_565 31_665
Cu2 Cu2 Se1 82.3(3) 2_665 31_565
Cu2 Cu2 Se1 62.2(5) 32_455 .
Cu2 Cu2 Se1 62.2(5) 33_655 .
Cu2 Cu2 Se1 60.6(4) 33_655 31_665
Cu2 Cu2 Se1 59.5(3) 31_565 31_565
Cu2 Cu2 Se1 151.3(10) 31_665 31_565
Cu2 Cu2 Se1 135.7(3) 32_455 31_665
Cu2 Cu2 Se1 133.9(3) 2_665 31_665
Cu2 Cu2 Se1 82.2(3) 2_665 .
Cu2 Cu2 Se1 59.4(3) 31_665 31_665
Cu2 Cu2 Se1 60.6(4) 32_455 31_565
Cu2 Cu2 Se1 135.7(3) 33_655 31_565
Cu2 Cu2 Cu2 105.0(9) 33_655 31_565
Cu2 Cu2 Cu2 102.7(7) 33_655 33
Cu2 Cu2 Cu2 89.998(13) 3_565 33_655
Cu2 Cu2 Cu2 34.1(4) 2_665 33_545
Cu2 Cu2 Cu2 11.0(5) 31_665 32
Cu2 Cu2 Cu2 15.8(6) 32_455 31_565
Cu2 Cu2 Cu2 83.4(2) 2_665 33
Cu2 Cu2 Cu2 11.0(5) 31_565 33
Cu2 Cu2 Cu2 136.8(4) 2_665 33_655
Cu2 Cu2 Cu2 90.9(5) 33 33_545
Cu2 Cu2 Cu2 113.9(10) 31_565 32
Cu2 Cu2 Cu2 105.0(9) 32_455 31_665
Cu2 Cu2 Cu2 90.000(11) 2_665 32_455
Cu2 Cu2 Cu2 59.999(3) 2_665 3_565
Cu2 Cu2 Cu2 135.4(3) 3_565 33
Cu2 Cu2 Cu2 124.5(6) 2_665 31_665
Cu2 Cu2 Cu2 136.8(4) 3_565 32_455
Cu2 Cu2 Cu2 113.7(10) 31_665 31_565
Cu2 Cu2 Cu2 74.2(6) 3_565 31_665
Cu2 Cu2 Cu2 15.8(6) 33_655 31_665
Cu2 Cu2 Cu2 111.8(8) 32 33
Cu2 Cu2 Cu2 135.4(3) 2_665 32
Cu2 Cu2 Cu2 44.6(3) 3_565 33_545
Cu2 Cu2 Cu2 102.7(7) 33_655 33_545
Cu2 Cu2 Cu2 92.9(6) 32_455 33_545
Cu2 Cu2 Cu2 83.4(2) 3_565 32
Cu2 Cu2 Cu2 91.0(6) 31_665 33_545
Cu2 Cu2 Cu2 79.9(8) 31_565 33_545
Cu2 Cu2 Cu2 93.6(7) 33_655 32_455
Cu2 Cu2 Cu2 9.1(3) 33_655 32
Cu2 Cu2 Cu2 101.9(6) 32 33_545
Cu2 Cu2 Cu2 124.5(6) 3_565 31_565
Cu2 Cu2 Cu2 9.1(3) 32_455 33
Cu2 Cu2 Cu2 102.7(7) 32_455 32
Cu2 Cu2 Cu2 113.9(10) 31_665 33
Cu2 Cu2 Cu2 74.2(6) 2_665 31_565
Se1 Cu1A Se1 107.2(5) 19_666 1_655
Se1 Cu1A Se1 111.7(5) 1_655 1_545
Se1 Cu1A Se1 107.2(5) 19_666 1_545
Se1 Cu1A Se1 111.6(5) 1_655 .
Se1 Cu1A Se1 107.2(5) 19_666 .
Se1 Cu1A Se1 111.6(5) 1_545 .
Se1 Cu1A Cu1A 54.1(7) 19_666 19_766
Se1 Cu1A Cu1A 53.1(2) . 19_666
Se1 Cu1A Cu1A 124.1(3) 1_655 19_666
Se1 Cu1A Cu1A 53.1(2) 1_655 19_766
Se1 Cu1A Cu1A 54.1(7) 19_666 19_666
Se1 Cu1A Cu1A 54.1(7) 19_666 19_656
Se1 Cu1A Cu1A 124.1(3) 1_545 19_666
Se1 Cu1A Cu1A 124.1(3) . 19_656
Se1 Cu1A Cu1A 124.1(3) 1_545 19_766
Se1 Cu1A Cu1A 124.1(3) 1_655 19_656
Se1 Cu1A Cu1A 124.1(3) . 19_766
Se1 Cu1A Cu1A 53.1(2) 1_545 19_656
Cu1A Cu1A Cu1A 89.1(10) 19_766 19_656
Cu1A Cu1A Cu1A 89.1(10) 19_766 19_666
Cu1A Cu1A Cu1A 89.1(10) 19_656 19_666
loop_
_geom_bond_atom_site_label_1
_geom_bond_atom_site_label_2
_geom_bond_distance
_geom_bond_site_symmetry_2
Se1 Cu1B 2.399(5) 1_565
Se1 Cu1B 2.399(5) 1_455
Se1 Cu1B 2.400(5) .
Se1 Cu2 2.498(7) 31_565
Se1 Cu2 2.462(13) .
Se1 Cu2 2.462(13) 3_565
Se1 Cu2 2.498(7) 33_655
Se1 Cu2 2.498(7) 32_455
Se1 Cu2 2.462(13) 2_665
Se1 Cu1A 2.47(2) 19_666
Se1 Cu1A 2.497(7) 1_565
Se1 Cu1A 2.497(7) 1_455
Cu1B Se1 2.399(5) 1_655
Cu1B Se1 2.399(5) 1_545
Cu2 Se1 2.498(7) 31_565
Cu2 Se1 2.498(7) 31_665
Cu2 Cu2 2.900(13) 33_545
Cu2 Cu2 2.467(14) 31_565
Cu2 Cu2 2.375(19) 33_655
Cu2 Cu2 2.900(13) 32
Cu2 Cu2 2.900(13) 33
Cu2 Cu2 0.67(2) 2_665
Cu2 Cu2 0.67(2) 3_565
Cu2 Cu2 2.467(14) 31_665
Cu2 Cu2 2.375(19) 32_455
Cu1A Se1 2.47(2) 19_666
Cu1A Se1 2.497(7) 1_655
Cu1A Se1 2.497(7) 1_545
Cu1A Cu1A 2.95(3) 19_766
Cu1A Cu1A 2.95(3) 19_656
Cu1A Cu1A 2.95(3) 19_666
