On two alizarin polymorphs
Cyrański, Michał K.; Jamróz, Michał H.; Rygula, Anna; Dobrowolski, Jan Cz.; Dobrzycki, Łukasz; Baranska, Malgorzata; CrystEngComm 14 (2012) 3667–; doi:10.1039/c2ce06063a

data_7207736
_publ_section_title
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 On two alizarin polymorphs
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_journal_issue                   10
_journal_name_full               CrystEngComm
_journal_page_first              3667
_journal_paper_doi               10.1039/c2ce06063a
_journal_volume                  14
_journal_year                    2012
_chemical_formula_sum            'C14 H8 O4'
_chemical_formula_weight         240.20
_chemical_name_systematic
;
?
;
_space_group_IT_number           14
_symmetry_cell_setting           monoclinic
_symmetry_space_group_name_Hall  '-P 2ybc'
_symmetry_space_group_name_H-M   'P 1 21/c 1'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_atom_sites_solution_secondary   difmap
_audit_creation_method           SHELXL-97
_cell_angle_alpha                90.00
_cell_angle_beta                 104.424(15)
_cell_angle_gamma                90.00
_cell_formula_units_Z            6
_cell_length_a                   20.059(3)
_cell_length_b                   3.6850(4)
_cell_length_c                   21.004(3)
_cell_measurement_reflns_used    1833
_cell_measurement_temperature    100(2)
_cell_measurement_theta_max      28.0651
_cell_measurement_theta_min      2.9097
_cell_volume                     1503.6(4)
_computing_cell_refinement
;
CrysAlis RED, Oxford Diffraction Ltd.,
Version 1.171.33.66 (release 28-04-2010 CrysAlis171 .NET)
(compiled Apr 28 2010,14:27:37)
;
_computing_data_collection
;
CrysAlis CCD, Oxford Diffraction Ltd.,
Version 1.171.33.66 (release 28-04-2010 CrysAlis171 .NET)
(compiled Apr 28 2010,14:27:37)
;
_computing_data_reduction
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CrysAlis RED, Oxford Diffraction Ltd.,
Version 1.171.33.66 (release 28-04-2010 CrysAlis171 .NET)
(compiled Apr 28 2010,14:27:37)
;
_diffrn_ambient_temperature      100(2)
_diffrn_measured_fraction_theta_full 0.997
_diffrn_measured_fraction_theta_max 0.997
_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  0.0000
_diffrn_reflns_av_sigmaI/netI    0.0989
_diffrn_reflns_limit_h_max       23
_diffrn_reflns_limit_h_min       -23
_diffrn_reflns_limit_k_max       4
_diffrn_reflns_limit_k_min       -4
_diffrn_reflns_limit_l_max       25
_diffrn_reflns_limit_l_min       -25
_diffrn_reflns_number            3570
_diffrn_reflns_theta_full        25.05
_diffrn_reflns_theta_max         25.05
_diffrn_reflns_theta_min         3.15
_exptl_absorpt_coefficient_mu    0.118
_exptl_absorpt_correction_T_max  0.9894
_exptl_absorpt_correction_T_min  0.9598
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details
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CrysAlis RED, Oxford Diffraction Ltd.,
Version 1.171.33.66 (release 28-04-2010 CrysAlis171 .NET)
(compiled Apr 28 2010,14:27:37)
Empirical absorption correction using spherical harmonics,
implemented in SCALE3 ABSPACK scaling algorithm.
;
_exptl_crystal_colour            orange
_exptl_crystal_density_diffrn    1.592
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       prismatic
_exptl_crystal_F_000             744
_exptl_crystal_size_max          0.35
_exptl_crystal_size_mid          0.09
_exptl_crystal_size_min          0.09
_refine_diff_density_max         0.481
_refine_diff_density_min         -0.250
_refine_diff_density_rms         0.067
_refine_ls_extinction_method     none
_refine_ls_goodness_of_fit_ref   0.851
_refine_ls_hydrogen_treatment    constr
_refine_ls_matrix_type           full
_refine_ls_number_parameters     279
_refine_ls_number_reflns         3570
_refine_ls_number_restraints     112
_refine_ls_restrained_S_all      0.880
_refine_ls_R_factor_all          0.1336
_refine_ls_R_factor_gt           0.0696
_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/[\s^2^(Fo^2^)+(0.1111P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_gt          0.1763
_refine_ls_wR_factor_ref         0.2013
_reflns_number_gt                1582
_reflns_number_total             3570
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            c2ce06063a.txt
_cod_data_source_block           a1
_cod_depositor_comments
;
The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Monoclinic' changed to 'monoclinic'
according to /home/saulius/struct/CIF-dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.1 from 2010-06-29.

Automatic conversion script
Id: cif_fix_values 1715 2011-07-08 13:25:40Z adriana 
;
_cod_original_cell_volume        1503.7(3)
_cod_original_sg_symbol_H-M      P21/c
_cod_database_code               7207736