#------------------------------------------------------------------------------
#$Date: 2011-09-10 05:16:28 +0200 (Sat, 10 Sep 2011) $
#$Revision: 25271 $
#$URL: svn://www.crystallography.net/cod/cif/2/2100550.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_2100550
loop_
_publ_author_name
'Palatinus, Luk\'a\<s'
'Du\<sek, Michal'
'Glaum, Robert'
'El Bali, Brahim'
_publ_section_title
;
 The incommensurately and commensurately modulated crystal structures
 of chromium(II) diphosphate
;
_journal_coeditor_code           SN5033
_journal_issue                   4
_journal_name_full               'Acta Crystallographica Section B'
_journal_page_first              556
_journal_page_last               566
_journal_volume                  62
_journal_year                    2006
_chemical_formula_iupac          'Cr2 (P2 O7)'
_chemical_formula_structural     'Cr2 (P2 O7)'
_chemical_formula_sum            'Cr2 O7 P2'
_chemical_formula_weight         277.9
_chemical_name_common            'chromium(II) diphosphate'
_chemical_name_systematic        ' ?'
_space_group_ssg_name            C2/m(\a0\g)0s
_symmetry_cell_setting           monoclinic
_audit_creation_method           'Jana2000 Version : 04/11/2005'
_cell_angle_alpha                90
_cell_angle_beta                 108.708
_cell_angle_gamma                90
_cell_formula_units_Z            2
_cell_length_a                   7.0464
_cell_length_b                   8.4073
_cell_length_c                   4.6394
_cell_measurement_reflns_used    4589
_cell_measurement_temperature    140
_cell_measurement_theta_max      26.4976
_cell_measurement_theta_min      2.8084
_cell_modulation_dimension       1
_cell_volume                     260.322
_computing_cell_refinement       'Crysalis CCD (Oxford diffraction, 2004)'
_computing_data_collection       'Crysalis CCD (Oxford diffraction, 2004)'
_computing_data_reduction        'Crysalis CCD (Oxford diffraction, 2004)'
_computing_molecular_graphics    '(Diamond; Brandenburg et al., 2005)'
_computing_publication_material  '(Jana2000; Petricek et al., 2000)'
_computing_structure_refinement  '(Jana2000; Petricek et al., 2000)'
_computing_structure_solution    '(BayMEM; van Smaalen et al., 2003)'
_diffrn_ambient_temperature      140
_diffrn_detector_area_resol_mean 8.3438
_diffrn_measured_fraction_theta_full 1.00
_diffrn_measurement_device_type  'Oxford Diffraction CCD'
_diffrn_measurement_method
'Rotation method data acquisition using \w scans'
_diffrn_radiation_monochromator  graphite
_diffrn_radiation_source         'X-ray tube'
_diffrn_radiation_type           'Mo K\a'
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0143
_diffrn_reflns_av_sigmaI/netI    0.0050
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       -9
_diffrn_reflns_limit_index_m_1_max 3
_diffrn_reflns_limit_index_m_1_min -3
_diffrn_reflns_limit_k_max       10
_diffrn_reflns_limit_k_min       -10
_diffrn_reflns_limit_l_max       6
_diffrn_reflns_limit_l_min       -6
_diffrn_reflns_number            13281
_diffrn_reflns_reduction_process
; Integration of the CCD images was done by program Crysalis RED
(Oxford diffraction, 2004). The same program was used for indexing of the
crystal shape, its refinement, absorption correction and data scaling.
;
_diffrn_reflns_theta_full        26.56
_diffrn_reflns_theta_max         26.56
_diffrn_reflns_theta_min         3.35
_exptl_absorpt_coefficient_mu    4.769
_exptl_absorpt_correction_T_max  0.67729
_exptl_absorpt_correction_T_min  0.43451
_exptl_absorpt_correction_type   gaussian
_exptl_absorpt_process_details
;
CrysAlis RED, Oxford Diffraction Ltd., Version 1.171.27p5 beta
Analytical numeric absorption correction using a multifaceted crystal
model.
;
_exptl_crystal_colour            blue
_exptl_crystal_density_diffrn    3.5446
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       'irregular column'
_exptl_crystal_F_000             268
_exptl_crystal_size_max          0.14
_exptl_crystal_size_mid          0.09
_exptl_crystal_size_min          0.04
_refine_diff_density_max         0.35
_refine_diff_density_min         -0.34
_refine_ls_extinction_coef       0.039(9)
_refine_ls_extinction_method
'B-C type 1 Gaussian isotropic (Becker & Coppens, 1974)'
_refine_ls_goodness_of_fit_ref   1.71
_refine_ls_number_parameters     105
_refine_ls_number_reflns         1598
_refine_ls_R_factor_all          0.0248
_refine_ls_R_factor_gt           0.0205
_refine_ls_shift/su_max          0.0012
_refine_ls_shift/su_mean         0.0001
_refine_ls_structure_factor_coef F
_refine_ls_weighting_details     w=1/(\s^2^(F)+0.0004F^2^)
_refine_ls_weighting_scheme      sigma
_refine_ls_wR_factor_gt          0.0396
_refine_ls_wR_factor_ref         0.0435
_reflns_number_gt                1466
_reflns_number_total             1598
_reflns_threshold_expression     I>3\s(I)
_[local]_cod_data_source_file    sn5033.cif
_[local]_cod_data_source_block   '_alpha1-Cr2P2O7_superspace'
_cod_original_cell_volume        260.3224
_cod_database_code               2100550
loop_
_space_group_symop_ssg_id
_space_group_symop_ssg_operation_algebraic
1 x1,x2,x3,x4
2 -x1,x2,-x3,1/2-x4
3 -x1,-x2,-x3,-x4
4 x1,-x2,x3,1/2+x4
5 1/2+x1,1/2+x2,x3,x4
6 1/2-x1,1/2+x2,-x3,1/2-x4
7 1/2-x1,1/2-x2,-x3,-x4
8 1/2+x1,1/2-x2,x3,1/2+x4
loop_
_atom_site_type_symbol
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_U_iso_or_equiv
_atom_site_adp_type
_atom_site_calc_flag
_atom_site_occupancy
P P 0.80598(6) -0.01568(5) 0.58475(10) 0.00406(17) Uani d 1
O O1 0.63867(18) 0 0.2766(3) 0.0057(4) Uani d 1
O O2 1 -0.07145(17) 0.5 0.0086(5) Uani d 1
O O3 0.80778(14) -0.14622(11) 0.7572(2) 0.0075(3) Uani d 1
Cr Cr 0.5 -0.18740(3) 0 0.00463(14) Uani d 1
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
P 0.0032(3) 0.0044(2) 0.0041(3) -0.00011(13) 0.0005(2) 0.00005(13) P
O1 0.0058(6) 0.0044(6) 0.0058(7) 0 0.0004(5) 0 O
O2 0.0046(7) 0.0120(7) 0.0102(7) 0 0.0036(5) 0 O
O3 0.0071(5) 0.0070(4) 0.0071(5) 0.0006(3) 0.0004(4) 0.0010(4) O
Cr 0.0048(2) 0.0031(2) 0.0044(2) 0 -0.00074(15) 0 Cr
loop_
_atom_site_displace_Fourier_atom_site_label
_atom_site_displace_Fourier_axis
_atom_site_displace_Fourier_wave_vector_seq_id
_atom_site_displace_Fourier_param_cos
_atom_site_displace_Fourier_param_sin
P x 1 -0.00194(4) -0.00676(6)
P y 1 -0.00216(3) 0.00053(5)
P z 1 0.00462(6) 0.01073(9)
O1 x 1 0 0
O1 y 1 -0.00195(15) 0.00742(14)
O1 z 1 0 0
O1 x 2 0.00244(15) -0.00775(15)
O1 y 2 0 0
O1 z 2 -0.0001(2) 0.0005(2)
O1 x 3 0 0
O1 y 3 0 -0.00087(8)
O1 z 3 0 0
O2 x 1 0.00649(18) 0
O2 y 1 0 0.01002(16)
O2 z 1 0.0469(3) 0
O3 x 1 -0.0126(3) 0.00806(18)
O3 y 1 0.0009(2) -0.00409(13)
O3 z 1 0.0182(5) -0.0169(3)
O3 x 2 -0.00107(16) -0.00529(18)
O3 y 2 0.00268(12) 0.00150(13)
O3 z 2 0.0055(2) 0.0073(3)
Cr x 1 0.01625(11) 0
Cr y 1 0 0.00182(3)
Cr z 1 -0.01952(16) 0
Cr x 2 0 -0.00590(7)
Cr y 2 -0.00070(3) 0
Cr z 2 0 0.00551(10)
loop_
_atom_site_displace_special_func_atom_site_label
_atom_site_displace_special_func_sawtooth_ax
_atom_site_displace_special_func_sawtooth_ay
_atom_site_displace_special_func_sawtooth_az
_atom_site_displace_special_func_sawtooth_c
_atom_site_displace_special_func_sawtooth_w
O3 -0.0513(5) -0.0117(3) 0.0055(7) 0.69266(12) 1
Cr -0.02552(16) 0 0.0089(2) 0.25 1
loop_
_atom_site_Fourier_wave_vector_seq_id
_atom_site_Fourier_wave_vector_x
_atom_site_Fourier_wave_vector_z
1 -0.33333 0.50000
2 -0.66667 1.00000
3 -1.00000 1.50000
loop_
_atom_site_occ_special_func_atom_site_label
_atom_site_occ_special_func_crenel_c
_atom_site_occ_special_func_crenel_w
P 0.85705(6) 0.5
O2 0.75 0.5
loop_
_atom_site_U_Fourier_atom_site_label
_atom_site_U_Fourier_tens_elem
_atom_site_U_Fourier_wave_vector_seq_id
_atom_site_U_Fourier_param_cos
_atom_site_U_Fourier_param_sin
O3 U11 1 -0.0021(5) 0.0025(4)
O3 U22 1 0.0001(4) -0.0009(4)
O3 U33 1 -0.0005(5) 0.0012(4)
O3 U12 1 -0.0001(4) -0.0007(3)
O3 U13 1 0.0016(4) -0.0012(3)
O3 U23 1 -0.0003(4) -0.0006(3)
O3 U11 2 -0.0006(4) -0.0009(4)
O3 U22 2 -0.0003(4) -0.0004(4)
O3 U33 2 -0.0003(4) -0.0003(4)
O3 U12 2 -0.0002(3) 0.0001(3)
O3 U13 2 0.0005(3) 0.0008(3)
O3 U23 2 0.0002(3) -0.0001(3)
Cr U11 1 0 -0.00109(14)
Cr U22 1 0 0.00002(12)
Cr U33 1 0 0.00013(14)
Cr U12 1 0.00029(11) 0
Cr U13 1 0 0.00041(10)
Cr U23 1 -0.00011(10) 0
loop_
_atom_type_symbol
_atom_type_scat_dispersion_real
_atom_type_scat_dispersion_imag
_atom_type_scat_source
Cr 0.321 0.624 'International Tables Vol C Tables  4.2.6.8 and 6.1.1.1'
P 0.102 0.094 'International Tables Vol C Tables  4.2.6.8 and 6.1.1.1'
O 0.011 0.006 'International Tables Vol C Tables  4.2.6.8 and 6.1.1.1'
loop_
_cell_wave_vector_seq_id
_cell_wave_vector_x
_cell_wave_vector_y
_cell_wave_vector_z
1 -0.33330 0.00000 0.50000
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_publ_flag
_geom_angle_max
_geom_angle_min
_geom_angle_av
O1 P O2 . . yes 107.08(10) 103.35(10) 105.42(10)
O1 P O3 . . yes 111.92(18) 110.95(14) 111.36(15)
O1 P O3 . 7_646 yes 67.19(11) 64.47(10) 65.99(10)
O1 P O3 . 2_757 yes 165.67(11) 164.79(10) 165.09(11)
O1 P O3 . 6_656 yes 63.94(9) 60.17(9) 62.27(9)
O1 P O3 . 4_555 yes 111.78(18) 110.38(13) 111.05(15)
O2 P O3 . . yes 105.37(16) 102.2(2) 103.5(2)
O2 P O3 . 7_646 yes 79.66(19) 70.48(14) 76.35(15)
O2 P O3 . 2_757 yes 78.09(8) 68.27(11) 73.57(9)
O2 P O3 . 6_656 yes 105.35(13) 97.08(13) 102.42(15)
O2 P O3 . 4_555 yes 111.47(16) 110.5(2) 111.0(2)
O3 P O3 . 7_646 yes 67.4(2) 60.24(11) 62.95(17)
O3 P O3 . 2_757 yes 57.91(19) 54.52(10) 55.87(15)
O3 P O3 . 6_656 yes 157.50(14) 152.09(18) 154.01(18)
O3 P O3 . 4_555 yes 114.4(2) 113.4(2) 113.9(2)
O3 P O3 4_555 . yes 114.4(2) 113.4(2) 113.9(2)
O3 P O3 4_555 7_646 yes 177.41(14) 169.3(2) 172.36(19)
O3 P O3 4_555 2_757 yes 83.73(13) 81.21(16) 82.45(15)
O3 P O3 4_555 6_656 yes 55.00(12) 52.71(15) 54.15(15)
O1 Cr O1 . 3_655 yes 81.90(7) 79.13(6) 80.26(6)
O1 Cr O2 . 7_645 yes 144.11(7) 136.57(9) 139.44(8)
O1 Cr O2 . 7_646 yes 97.78(10) 92.58(9) 95.41(9)
O1 Cr O3 . 1_554 yes 90.43(8) 75.35(8) 83.15(9)
O1 Cr O3 . . yes 45.46(6) 44.18(6) 44.78(7)
O1 Cr O3 . 7_646 yes 96.55(10) 92.88(13) 94.95(10)
O1 Cr O3 . 2_655 yes 125.63(7) 121.59(9) 123.69(7)
O1 Cr O3 . 2_656 yes 92.54(9) 78.71(9) 85.76(9)
O1 Cr O3 . 8_444 yes 170.14(16) 161.13(14) 166.28(14)
O1 Cr O1 3_655 . yes 81.90(7) 79.13(6) 80.26(6)
O1 Cr O2 3_655 7_645 yes 97.79(10) 92.57(9) 95.41(9)
O1 Cr O2 3_655 7_646 yes 144.12(7) 136.56(9) 139.45(8)
O1 Cr O3 3_655 1_554 yes 92.54(9) 78.70(9) 85.76(9)
O1 Cr O3 3_655 . yes 125.63(7) 121.58(9) 123.69(7)
O1 Cr O3 3_655 7_646 yes 170.15(16) 161.13(14) 166.28(14)
O1 Cr O3 3_655 2_655 yes 45.46(6) 44.17(6) 44.78(7)
O1 Cr O3 3_655 2_656 yes 90.43(8) 75.35(8) 83.15(9)
O1 Cr O3 3_655 8_444 yes 96.55(10) 92.88(13) 94.95(10)
O3 Cr O3 1_554 . yes 105.42(11) 90.18(11) 94.79(10)
O3 Cr O3 1_554 7_646 yes 84.60(18) 78.87(17) 81.00(15)
O3 Cr O3 1_554 2_655 yes 87.76(11) 73.55(11) 83.77(10)
O3 Cr O3 1_554 2_656 yes 166.56(14) 164.11(8) 165.37(10)
O3 Cr O3 1_554 8_444 yes 112.14(17) 106.60(18) 109.39(15)
O3 Cr O3 7_646 1_554 yes 84.60(17) 78.87(18) 81.00(15)
O3 Cr O3 7_646 . yes 57.36(17) 53.29(13) 54.90(12)
O3 Cr O3 7_646 2_655 yes 137.13(13) 131.02(16) 135.65(13)
O3 Cr O3 7_646 2_656 yes 112.14(19) 106.60(17) 109.39(15)
O3 Cr O3 7_646 8_444 yes 94.19(17) 90.91(9) 92.28(13)
O3 Cr O3 2_656 1_554 yes 166.56(14) 164.11(8) 165.37(10)
O3 Cr O3 2_656 . yes 87.77(11) 73.54(11) 83.77(10)
O3 Cr O3 2_656 7_646 yes 112.14(17) 106.60(18) 109.39(15)
O3 Cr O3 2_656 2_655 yes 105.42(11) 90.18(11) 94.79(10)
O3 Cr O3 2_656 8_444 yes 84.60(18) 78.86(17) 80.99(15)
O3 Cr O3 8_444 1_554 yes 112.14(19) 106.60(17) 109.39(15)
O3 Cr O3 8_444 . yes 137.12(13) 131.02(16) 135.65(13)
O3 Cr O3 8_444 7_646 yes 94.19(18) 90.91(10) 92.28(13)
O3 Cr O3 8_444 2_655 yes 57.35(17) 53.30(13) 54.90(12)
O3 Cr O3 8_444 2_656 yes 84.60(17) 78.86(18) 80.99(15)
P O2 P . 2_756 yes 144.9(2) 140.1(4) 143.3(3)
loop_
_geom_bond_atom_site_label_1
_geom_bond_atom_site_label_2
_geom_bond_site_symmetry_2
_geom_bond_publ_flag
_geom_bond_distance_max
_geom_bond_distance_min
_geom_bond_distance_av
P O1 . yes 1.5409(17) 1.5335(17) 1.5379(17)
P O2 . yes 1.608(2) 1.597(2) 1.601(2)
P O3 . yes 1.521(4) 1.513(3) 1.518(4)
P O3 4_555 yes 1.509(3) 1.490(4) 1.498(4)
Cr O1 . yes 2.1088(17) 2.0586(18) 2.0809(18)
Cr O1 3_655 yes 2.1088(17) 2.0586(18) 2.0809(18)
Cr O3 1_554 yes 3.487(6) 2.366(3) 2.769(5)
Cr O3 7_646 yes 2.049(3) 1.977(4) 2.023(4)
Cr O3 2_656 yes 3.486(6) 2.366(3) 2.769(5)
Cr O3 8_444 yes 2.049(3) 1.977(4) 2.023(4)