#------------------------------------------------------------------------------
#$Date: 2010-05-06 08:38:22 +0300 (Thu, 06 May 2010) $
#$Revision: 1153 $
#$URL: file:///home/coder/svn-repositories/cod/cif/2/2101644.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_2101644
_journal_name_full               'Acta Crystallographica, Section B'
_journal_volume                  52
_space_group_IT_number           148
_symmetry_space_group_name_Hall  '-R 3'
_symmetry_space_group_name_H-M   'R -3 :H'
_[local]_cod_cif_authors_sg_H-M  'R -3'
loop_
_publ_author_name
' LEE, CHI-RUNG; WANG, CHIH-CHIEH AND WANG, YU '
_publ_section_title
;
 STRUCTURAL RELATIONSHIP OF VARIOUS SQUARATES
;
_journal_issue                   6
_journal_page_first              966
_journal_page_last               975
_journal_year                    1996
_chemical_formula_moiety         '[Fe (C4 O4 )(H2 O)2 ]'
_chemical_formula_sum            'C4 H4 Fe O6'
_chemical_formula_weight         203.92
_chemical_name_systematic
;
 ?  #Insert the chemical name here.
;
_symmetry_cell_setting           Trigonal
_cell_angle_alpha                90.0
_cell_angle_beta                 90.0
_cell_angle_gamma                120.0
_cell_formula_units_Z            9
_cell_length_a                   11.4395(19)
_cell_length_b                   11.4395(19)
_cell_length_c                   14.504(3)
_cell_measurement_reflns_used    25
_cell_measurement_temperature    298
_cell_measurement_theta_max      12.70
_cell_measurement_theta_min      7.47
_cell_volume                     1643.7(4)
_computing_data_reduction
' NRCVAX DATRD2 (Gabe, Le Page, Charland, Lee & White, 1989)'
_computing_molecular_graphics
' NRCVAX (Gabe, Le Page, Charland, Lee & White, 1989)'
_computing_publication_material
' NRCVAX TABLES (Gabe, Le Page, Charland, Lee & White, 1989)'
_computing_structure_refinement
' NRCVAX LSTSQ (Gabe, Le Page, Charland, Lee & White, 1989)'
_computing_structure_solution
' NRCVAX SOLVER (Gabe, Le Page, Charland, Lee & White, 1989)'
_diffrn_ambient_temperature      298
_diffrn_measurement_device       'Nonius CAD-4    '
_diffrn_measurement_method       '\q/2\q b/P/b '
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'xray tube'
_diffrn_radiation_type           MoK\a
_diffrn_radiation_wavelength     0.7107
_diffrn_reflns_av_R_equivalents  0.028
_diffrn_reflns_limit_h_max       10
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       0
_diffrn_reflns_limit_l_max       15
_diffrn_reflns_limit_l_min       0
_diffrn_reflns_number            574
_diffrn_reflns_theta_max         22.5
_diffrn_reflns_theta_min         0.00
_diffrn_standards_decay_%        0.0
_diffrn_standards_interval_time  60
_diffrn_standards_number         3
_exptl_absorpt_coefficient_mu    2.04
_exptl_absorpt_correction_T_max  0.9997
_exptl_absorpt_correction_T_min  0.9624
_exptl_absorpt_correction_type   '\y scan (North, Phillips & Mathews, 1968'
_exptl_crystal_colour            'pale yellow'
_exptl_crystal_density_diffrn    1.854
_exptl_crystal_description       cube
_exptl_crystal_F_000             918
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.15
_exptl_crystal_size_min          0.15
_refine_diff_density_max         0.39
_refine_diff_density_min         -0.24
_refine_ls_extinction_coef       3.653(1721)x10^3^
_refine_ls_extinction_method     'Secondary (Larson, 1970)'
_refine_ls_goodness_of_fit_obs   4.68
_refine_ls_hydrogen_treatment    'H atoms placed in calculated positions'
_refine_ls_matrix_type           atomblock
_refine_ls_number_parameters     55
_refine_ls_number_reflns         435
_refine_ls_R_factor_all          0.033
_refine_ls_R_factor_obs          0.028
_refine_ls_shift/esd_max         0.001
_refine_ls_structure_factor_coef F
_refine_ls_weighting_scheme      1/\s^2^(F)
_refine_ls_wR_factor_all         0.032
_refine_ls_wR_factor_obs         0.032
_reflns_number_observed          435
_reflns_number_total             486
_reflns_observed_criterion       'Inet > 2.0\s(Inet)'
_[local]_cod_data_source_file    oa0002.cif
loop_
_symmetry_equiv_pos_as_xyz
x,y,z
-y,x-y,z
-x+y,-x,z
-x,-y,-z
y,-x+y,-z
x-y,x,-z
2/3+x,1/3+y,1/3+z
1/3+x,2/3+y,2/3+z
2/3-y,1/3+x-y,1/3+z
1/3-y,2/3+x-y,2/3+z
2/3-x+y,1/3-x,1/3+z
1/3-x+y,2/3-x,2/3+z
2/3-x,1/3-y,1/3-z
1/3-x,2/3-y,2/3-z
2/3+y,1/3-x+y,1/3-z
1/3+y,2/3-x+y,2/3-z
2/3+x-y,1/3+x,1/3-z
1/3+x-y,2/3+x,2/3-z
loop_
_diffrn_standard_refln_index_h
_diffrn_standard_refln_index_k
_diffrn_standard_refln_index_l
6 0 0
0 6 0
0 0 9
loop_
_atom_type_symbol
_atom_type_scat_dispersion_real
_atom_type_scat_dispersion_imag
_atom_type_scat_source
Fe 0.301 0.845 'International Tables Vol. IV Table 2.2B'
O 0.008 0.006 'International Tables Vol. IV Table 2.2B'
C 0.002 0.002 'International Tables Vol. IV Table 2.2B'
H 0.000 0.000 'International Tables Vol. IV Table 2.2B'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_U_iso_or_equiv
_atom_site_thermal_displace_type
_atom_site_refinement_flags
_atom_site_type_symbol
Fe 0.00000 0.50000 0.50000 0.0108(9) Uani S Fe
O1 0.1491(4) 0.6884(4) 0.4486(3) 0.023(3) Uani . O
O2 0.0127(4) 0.3904(5) 0.3842(3) 0.024(3) Uani . O
O3 -0.1568(4) 0.4984(4) 0.4259(3) 0.022(3) Uani . O
C1 0.1578(6) 0.7675(6) 0.3857(4) 0.017(4) Uani . C
C2 0.0984(6) 0.3601(6) 0.3571(4) 0.016(5) Uani . C
H1 -0.118 0.560 0.375 0.08(3) Uiso . H
H2 -0.224 0.500 0.464 0.04(2) Uiso . H
loop_
_atom_site_aniso_label
_atom_site_aniso_U_11
_atom_site_aniso_U_22
_atom_site_aniso_U_33
_atom_site_aniso_U_12
_atom_site_aniso_U_13
_atom_site_aniso_U_23
_atom_site_aniso_type_symbol
Fe 0.0120(8) 0.0110(8) 0.0087(6) 0.0052(7) 0.0001(6) -0.0006(6) Fe
O1 0.024(3) 0.017(3) 0.017(3) 0.003(2) -0.008(2) 0.006(2) O
O2 0.022(3) 0.039(3) 0.020(3) 0.022(3) -0.008(2) -0.016(2) O
O3 0.020(3) 0.034(3) 0.016(2) 0.016(2) 0.005(2) 0.007(2) O
C1 0.017(4) 0.018(4) 0.015(3) 0.007(4) -0.003(3) -0.002(3) C
C2 0.017(4) 0.019(4) 0.014(4) 0.010(3) -0.002(3) -0.004(3) C
loop_
_geom_bond_atom_site_label_1
_geom_bond_atom_site_label_2
_geom_bond_site_symmetry_2
_geom_bond_distance
_geom_bond_publ_flag
Fe O1 ? 2.106(4) no
Fe O1 4_566 2.106(4) no
Fe O2 ? 2.144(4) no
Fe O2 4_566 2.144(4) no
Fe O3 ? 2.084(4) no
Fe O3 4_566 2.084(4) no
O1 C1 ? 1.253(7) no
O2 C2 ? 1.255(7) no
O3 H1 ? 0.956(4) no
O3 H2 ? 0.953(4) no
C1 C2 3_565 1.454(7) no
C1 C2 18_555 1.471(13) no
C2 C1 2_665 1.454(11) no
C2 C1 16_445 1.471(12) no
loop_
_geom_contact_atom_site_label_1
_geom_contact_atom_site_label_2
_geom_contact_distance
_geom_contact_site_symmetry_2
_geom_contact_publ_flag
O1 H2 1.806(4) 6_666 no
O2 H1 1.802(4) 16_445 no
H1 O2 1.802(3) 18_555 no
H1 H2 1.6619(2) ? no
H2 O1 1.806(7) 5_456 no
loop_
_geom_angle_atom_site_label_1
_geom_angle_atom_site_label_2
_geom_angle_atom_site_label_3
_geom_angle_site_symmetry_1
_geom_angle_site_symmetry_3
_geom_angle
_geom_angle_publ_flag
O1 Fe O1 ? 4_566 179.9 no
O1 Fe O2 ? ? 93.68(16) no
O1 Fe O2 ? 4_566 86.32(16) no
O1 Fe O3 ? ? 94.56(16) no
O1 Fe O3 ? 4_566 85.44(16) no
O1 Fe O2 4_566 ? 86.32(16) no
O1 Fe O2 4_566 4_566 93.68(16) no
O1 Fe O3 4_566 ? 85.44(16) no
O1 Fe O3 4_566 4_566 94.56(16) no
O2 Fe O2 ? 4_566 179.9 no
O2 Fe O3 ? ? 84.27(15) no
O2 Fe O3 ? 4_566 95.73(15) no
O2 Fe O3 4_566 ? 95.73(15) no
O2 Fe O3 4_566 4_566 84.27(15) no
O3 Fe O3 ? 4_566 179.9 no
Fe O1 C1 ? ? 136.7(4) no
Fe O1 H2 ? 6_666 109.59(18) no
C1 O1 H2 ? 6_666 110.9(4) no
Fe O2 C2 ? ? 134.2(4) no
Fe O2 H1 ? 16_445 119.7(2) no
C2 O2 H1 ? 16_445 105.5(3) no
Fe O3 H1 ? ? 107.6(3) no
Fe O3 H2 ? ? 113.5(3) no
H1 O3 H2 ? ? 121.0(4) no
O1 C1 C2 ? 3_565 134.2(7) no
O1 C1 C2 ? 18_555 136.2(5) no
C2 C1 C2 3_565 18_555 89.6(6) no
O2 C2 C1 ? 2_665 136.2(6) no
O2 C2 C1 ? 16_445 133.4(6) no
C1 C2 C1 2_665 16_445 90.4(7) no
O2 H1 O3 18_555 ? 177.9(4) no
O2 H1 H2 18_555 ? 148.7(4) no
O3 H1 H2 ? ? 29.4(3) no
O1 H2 O3 5_456 ? 164.8(3) no
O1 H2 H1 5_456 ? 145.7(2) no
O3 H2 H1 ? ? 29.5(3) no
_cod_database_code 2101644