#------------------------------------------------------------------------------
#$Date: 2016-03-23 03:52:50 +0200 (Wed, 23 Mar 2016) $
#$Revision: 179267 $
#$URL: svn://www.crystallography.net/cod/cif/4/31/87/4318774.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_4318774
loop_
_publ_author_name
'Bin Deng'
'Donald E. Ellis'
'James A. Ibers'
_publ_section_title
;
 New Layered Rubidium Rare-Earth Selenides: Syntheses, Structures,
 Physical Properties, and Electronic Structures for RbLnSe2
;
_journal_name_full               'Inorganic Chemistry'
_journal_page_first              5716
_journal_page_last               5720
_journal_paper_doi               10.1021/ic020324j
_journal_volume                  41
_journal_year                    2002
_chemical_formula_sum            'Gd Rb Se2'
_chemical_formula_weight         400.64
_chemical_name_common            'rubidium gadolinium selenide'
_chemical_name_systematic
;
  ?
;
_space_group_IT_number           166
_symmetry_cell_setting           trigonal
_symmetry_space_group_name_Hall  '-R 3 2"'
_symmetry_space_group_name_H-M   'R -3 m :H'
_atom_sites_solution_hydrogens   none
_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            3
_cell_length_a                   4.2473(7)
_cell_length_b                   4.2473(7)
_cell_length_c                   23.689(5)
_cell_measurement_reflns_used    1075
_cell_measurement_temperature    153(2)
_cell_measurement_theta_max      28.36
_cell_measurement_theta_min      2.58
_cell_volume                     370.09(12)
_computing_cell_refinement       'SMART version 5.054 (Bruker, 2000)'
_computing_data_collection       'SMART version 5.054 (Bruker, 2000)'
_computing_data_reduction        'SAINT-Plus version 6.22 (Bruker, 2000)'
_computing_molecular_graphics    'SHELXL-97 (Sheldrick, 1997)'
_computing_publication_material  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1990)'
_diffrn_ambient_temperature      153(2)
_diffrn_measured_fraction_theta_full 0.986
_diffrn_measured_fraction_theta_max 0.986
_diffrn_measurement_device_type  'Bruker 1000-CCD'
_diffrn_measurement_method       ω
_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  0.0263
_diffrn_reflns_av_sigmaI/netI    0.0168
_diffrn_reflns_limit_h_max       5
_diffrn_reflns_limit_h_min       -5
_diffrn_reflns_limit_k_max       5
_diffrn_reflns_limit_k_min       -5
_diffrn_reflns_limit_l_max       30
_diffrn_reflns_limit_l_min       -31
_diffrn_reflns_number            1075
_diffrn_reflns_theta_full        28.36
_diffrn_reflns_theta_max         28.36
_diffrn_reflns_theta_min         2.58
_diffrn_standards_decay_%        <2
_diffrn_standards_interval_count none
_diffrn_standards_interval_time  none
_diffrn_standards_number         none
_exptl_absorpt_coefficient_mu    37.791
_exptl_absorpt_correction_T_max  0.47104
_exptl_absorpt_correction_T_min  0.08410
_exptl_absorpt_correction_type   numerical
_exptl_absorpt_process_details   'face indexed'
_exptl_crystal_colour            yellow
_exptl_crystal_density_diffrn    5.393
_exptl_crystal_density_method    'not measured'
_exptl_crystal_F_000             507
_exptl_crystal_size_max          0.108
_exptl_crystal_size_mid          0.080
_exptl_crystal_size_min          0.020
_refine_diff_density_max         2.346
_refine_diff_density_min         -3.008
_refine_diff_density_rms         0.274
_refine_ls_extinction_coef       0.0009(3)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc²λ³/sin(2θ)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   1.389
_refine_ls_hydrogen_treatment    none
_refine_ls_matrix_type           full
_refine_ls_number_parameters     9
_refine_ls_number_reflns         144
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.389
_refine_ls_R_factor_all          0.0209
_refine_ls_R_factor_gt           0.0197
_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
  [1.00000+0.00000exp(0.00(sinθ/λ)²)]/
    [σ²(Fo²)+0.0000+0.0000*P+(0.0300P)²+0.0000sinθ/λ]
  where P = 1.00000Fo² + 0.00000Fc²
;
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.0520
_refine_ls_wR_factor_ref         0.0524
_reflns_number_gt                138
_reflns_number_total             144
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ic020324j_06.cif
_cod_data_source_block           rbgdse2
_cod_original_sg_symbol_H-M      'R -3 m'
_cod_database_code               4318774
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_assembly
_atom_site_disorder_group
Se Se 0.0000 0.0000 0.23314(4) 0.0075(3) Uani 1 6 d S . .
Gd Gd 0.0000 0.0000 0.5000 0.0068(3) Uani 1 12 d S . .
Rb Rb 0.0000 0.0000 0.0000 0.0110(3) Uani 1 12 d S . .
loop_
_atom_type_symbol
_atom_type_description
_atom_type_scat_dispersion_real
_atom_type_scat_dispersion_imag
_atom_type_scat_source
Se Se -0.0929 2.2259 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4'
Rb Rb -0.9393 2.9676 'International Tables Vol C Tables 4.2.6.8 and 6.1.1.4'
Gd Gd -0.1653 3.9035 '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
_geom_angle_publ_flag
Gd Se Gd 93.56(2) 13_444 13_554 ?
Gd Se Gd 93.56(2) 13_444 13_544 ?
Gd Se Gd 93.56(2) 13_554 13_544 ?
Gd Se Rb 168.64(3) 13_444 7 ?
Gd Se Rb 94.216(12) 13_554 7 ?
Gd Se Rb 94.216(12) 13_544 7 ?
Gd Se Rb 94.216(12) 13_444 7_445 ?
Gd Se Rb 168.64(3) 13_554 7_445 ?
Gd Se Rb 94.216(12) 13_544 7_445 ?
Rb Se Rb 76.96(2) 7 7_445 ?
Gd Se Rb 94.216(12) 13_444 7_455 ?
Gd Se Rb 94.216(12) 13_554 7_455 ?
Gd Se Rb 168.64(3) 13_544 7_455 ?
Rb Se Rb 76.96(2) 7 7_455 ?
Rb Se Rb 76.96(2) 7_445 7_455 ?
Se Gd Se 180.0 31_445 7 ?
Se Gd Se 93.56(2) 31_445 31 ?
Se Gd Se 86.44(2) 7 31 ?
Se Gd Se 86.44(2) 31_445 7_445 ?
Se Gd Se 93.56(2) 7 7_445 ?
Se Gd Se 180.0 31 7_445 ?
Se Gd Se 86.44(2) 31_445 7_455 ?
Se Gd Se 93.56(2) 7 7_455 ?
Se Gd Se 86.44(2) 31 7_455 ?
Se Gd Se 93.56(2) 7_445 7_455 ?
Se Gd Se 93.56(2) 31_445 31_545 ?
Se Gd Se 86.44(2) 7 31_545 ?
Se Gd Se 93.56(2) 31 31_545 ?
Se Gd Se 86.44(2) 7_445 31_545 ?
Se Gd Se 180.00(3) 7_455 31_545 ?
Se Gd Rb 132.922(14) 31_445 13 ?
Se Gd Rb 47.078(14) 7 13 ?
Se Gd Rb 90.86(2) 31 13 ?
Se Gd Rb 89.14(2) 7_445 13 ?
Se Gd Rb 47.079(14) 7_455 13 ?
Se Gd Rb 132.921(14) 31_545 13 ?
Se Gd Rb 47.078(14) 31_445 7_445 ?
Se Gd Rb 132.922(14) 7 7_445 ?
Se Gd Rb 89.14(2) 31 7_445 ?
Se Gd Rb 90.86(2) 7_445 7_445 ?
Se Gd Rb 132.921(14) 7_455 7_445 ?
Se Gd Rb 47.079(14) 31_545 7_445 ?
Rb Gd Rb 180.0 13 7_445 ?
Se Gd Rb 90.86(2) 31_445 13_445 ?
Se Gd Rb 89.14(2) 7 13_445 ?
Se Gd Rb 132.922(14) 31 13_445 ?
Se Gd Rb 47.078(14) 7_445 13_445 ?
Se Gd Rb 47.079(14) 7_455 13_445 ?
Se Gd Rb 132.921(14) 31_545 13_445 ?
Rb Gd Rb 54.378(12) 13 13_445 ?
Rb Gd Rb 125.622(12) 7_445 13_445 ?
Se Gd Rb 89.14(2) 31_445 7 ?
Se Gd Rb 90.86(2) 7 7 ?
Se Gd Rb 47.078(14) 31 7 ?
Se Gd Rb 132.922(14) 7_445 7 ?
Se Gd Rb 132.921(14) 7_455 7 ?
Se Gd Rb 47.079(14) 31_545 7 ?
Rb Gd Rb 125.622(12) 13 7 ?
Rb Gd Rb 54.378(12) 7_445 7 ?
Rb Gd Rb 180.0 13_445 7 ?
Se Gd Rb 47.079(14) 31_445 7_455 ?
Se Gd Rb 132.921(14) 7 7_455 ?
Se Gd Rb 47.079(14) 31 7_455 ?
Se Gd Rb 132.921(14) 7_445 7_455 ?
Se Gd Rb 90.86(2) 7_455 7_455 ?
Se Gd Rb 89.14(2) 31_545 7_455 ?
Rb Gd Rb 125.623(12) 13 7_455 ?
Rb Gd Rb 54.377(12) 7_445 7_455 ?
Rb Gd Rb 125.623(12) 13_445 7_455 ?
Rb Gd Rb 54.377(12) 7 7_455 ?
Se Gd Rb 132.921(14) 31_445 13_545 ?
Se Gd Rb 47.079(14) 7 13_545 ?
Se Gd Rb 132.921(14) 31 13_545 ?
Se Gd Rb 47.079(14) 7_445 13_545 ?
Se Gd Rb 89.14(2) 7_455 13_545 ?
Se Gd Rb 90.86(2) 31_545 13_545 ?
Rb Gd Rb 54.377(12) 13 13_545 ?
Rb Gd Rb 125.623(12) 7_445 13_545 ?
Rb Gd Rb 54.378(12) 13_445 13_545 ?
Rb Gd Rb 125.623(12) 7 13_545 ?
Rb Gd Rb 180.0 7_455 13_545 ?
Se Rb Se 180.00(2) 25 13_444 ?
Se Rb Se 76.96(2) 25 25_445 ?
Se Rb Se 103.04(2) 13_444 25_445 ?
Se Rb Se 103.04(2) 25 13_554 ?
Se Rb Se 76.96(2) 13_444 13_554 ?
Se Rb Se 180.00(2) 25_445 13_554 ?
Se Rb Se 103.04(2) 25 13_544 ?
Se Rb Se 76.96(2) 13_444 13_544 ?
Se Rb Se 103.04(2) 25_445 13_544 ?
Se Rb Se 76.96(2) 13_554 13_544 ?
Se Rb Se 76.96(2) 25 25_455 ?
Se Rb Se 103.04(2) 13_444 25_455 ?
Se Rb Se 76.96(2) 25_445 25_455 ?
Se Rb Se 103.04(2) 13_554 25_455 ?
Se Rb Se 180.00(2) 13_544 25_455 ?
Se Rb Rb 51.519(11) 25 1_665 ?
Se Rb Rb 128.481(11) 13_444 1_665 ?
Se Rb Rb 128.481(11) 25_445 1_665 ?
Se Rb Rb 51.519(11) 13_554 1_665 ?
Se Rb Rb 90.0 13_544 1_665 ?
Se Rb Rb 90.0 25_455 1_665 ?
Se Rb Rb 128.481(11) 25 1_445 ?
Se Rb Rb 51.519(11) 13_444 1_445 ?
Se Rb Rb 51.519(11) 25_445 1_445 ?
Se Rb Rb 128.481(11) 13_554 1_445 ?
Se Rb Rb 90.0 13_544 1_445 ?
Se Rb Rb 90.0 25_455 1_445 ?
Rb Rb Rb 180.0 1_665 1_445 ?
Se Rb Rb 90.0 25 1_565 ?
Se Rb Rb 90.0 13_444 1_565 ?
Se Rb Rb 128.481(11) 25_445 1_565 ?
Se Rb Rb 51.519(11) 13_554 1_565 ?
Se Rb Rb 128.481(11) 13_544 1_565 ?
Se Rb Rb 51.519(11) 25_455 1_565 ?
Rb Rb Rb 60.0 1_665 1_565 ?
Rb Rb Rb 120.0 1_445 1_565 ?
Se Rb Rb 51.519(11) 25 1_655 ?
Se Rb Rb 128.481(11) 13_444 1_655 ?
Se Rb Rb 90.0 25_445 1_655 ?
Se Rb Rb 90.0 13_554 1_655 ?
Se Rb Rb 51.519(11) 13_544 1_655 ?
Se Rb Rb 128.481(11) 25_455 1_655 ?
Rb Rb Rb 60.0 1_665 1_655 ?
Rb Rb Rb 120.0 1_445 1_655 ?
Rb Rb Rb 120.0 1_565 1_655 ?
Se Rb Rb 128.481(11) 25 1_455 ?
Se Rb Rb 51.519(11) 13_444 1_455 ?
Se Rb Rb 90.0 25_445 1_455 ?
Se Rb Rb 90.0 13_554 1_455 ?
Se Rb Rb 128.481(11) 13_544 1_455 ?
Se Rb Rb 51.519(11) 25_455 1_455 ?
Rb Rb Rb 120.0 1_665 1_455 ?
Rb Rb Rb 60.0 1_445 1_455 ?
Rb Rb Rb 60.0 1_565 1_455 ?
Rb Rb Rb 180.0 1_655 1_455 ?
Se Rb Rb 90.0 25 1_545 ?
Se Rb Rb 90.0 13_444 1_545 ?
Se Rb Rb 51.519(11) 25_445 1_545 ?
Se Rb Rb 128.481(11) 13_554 1_545 ?
Se Rb Rb 51.519(11) 13_544 1_545 ?
Se Rb Rb 128.481(11) 25_455 1_545 ?
Rb Rb Rb 120.0 1_665 1_545 ?
Rb Rb Rb 60.0 1_445 1_545 ?
Rb Rb Rb 180.0 1_565 1_545 ?
Rb Rb Rb 60.0 1_655 1_545 ?
Rb Rb Rb 120.0 1_455 1_545 ?
loop_
_geom_bond_atom_site_label_1
_geom_bond_atom_site_label_2
_geom_bond_distance
_geom_bond_site_symmetry_2
_geom_bond_publ_flag
Se Gd 2.9142(7) 13_444 ?
Se Gd 2.9142(7) 13_554 ?
Se Gd 2.9143(7) 13_544 ?
Se Rb 3.4128(8) 7 ?
Se Rb 3.4128(8) 7_445 ?
Se Rb 3.4128(8) 7_455 ?
Gd Se 2.9142(7) 31_445 ?
Gd Se 2.9142(7) 7 ?
Gd Se 2.9142(7) 31 ?
Gd Se 2.9142(7) 7_445 ?
Gd Se 2.9143(7) 7_455 ?
Gd Se 2.9143(7) 31_545 ?
Gd Rb 4.6477(8) 13 ?
Gd Rb 4.6477(8) 7_445 ?
Gd Rb 4.6477(8) 13_445 ?
Gd Rb 4.6477(8) 7 ?
Gd Rb 4.6477(8) 7_455 ?
Gd Rb 4.6477(8) 13_545 ?
Rb Se 3.4128(8) 25 ?
Rb Se 3.4128(8) 13_444 ?
Rb Se 3.4128(8) 25_445 ?
Rb Se 3.4128(8) 13_554 ?
Rb Se 3.4128(8) 13_544 ?
Rb Se 3.4128(8) 25_455 ?
Rb Rb 4.2473(7) 1_665 ?
Rb Rb 4.2473(7) 1_445 ?
Rb Rb 4.2473(7) 1_565 ?
Rb Rb 4.2473(7) 1_655 ?
Rb Rb 4.2473(7) 1_455 ?
Rb Rb 4.2473(7) 1_545 ?
