Comparison of the effects of pressure on three layered hydrates: a partially successful attempt to predict a high-pressure phase transition
Johnstone, Russell D. L.; Lennie, Alistair R.; Parsons, Simon; Pidcock, Elna; Warren, John E.; Acta Crystallographica Section B 65 (2009) 731–748; doi:10.1107/S0108768109039469

data_2104651
_publ_section_title
;
 Comparison of the effects of pressure on three layered hydrates: a
 partially successful attempt to predict a high-pressure phase
 transition
;
_journal_issue                   6
_journal_name_full               'Acta Crystallographica Section B'
_journal_page_first              731
_journal_page_last               748
_journal_paper_doi               10.1107/S0108768109039469
_journal_volume                  65
_journal_year                    2009
_chemical_formula_moiety         'C3 H9 N1 O6 S1'
_chemical_formula_sum            'C3 H9 N O6 S'
_chemical_formula_weight         187.17
_chemical_name_common            'L-Cysteic acid monohydrate'
_space_group_IT_number           19
_symmetry_cell_setting           orthorhombic
_symmetry_space_group_name_Hall  'P 2ac 2ab'
_symmetry_space_group_name_H-M   'P 21 21 21'
_atom_sites_solution_hydrogens   geom
_atom_sites_solution_primary     direct
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   6.8922(2)
_cell_length_b                   19.0021(19)
_cell_length_c                   5.2919(2)
_cell_measurement_reflns_used    1764
_cell_measurement_temperature    293
_cell_measurement_theta_max      19
_cell_measurement_theta_min      3
_cell_volume                     693.06(8)
_computing_cell_refinement       'Apex2 (Bruker AXS, 2006)'
_computing_data_collection       'Apex2 (Bruker AXS, 2006)'
_computing_data_reduction        'Apex2 (Bruker AXS, 2006)'
_computing_molecular_graphics    'CAMERON (Watkin et al., 1996)'
_computing_publication_material  'CRYSTALS (Betteridge et al., 2003)'
_computing_structure_refinement  'CRYSTALS (Betteridge et al., 2003)'
_computing_structure_solution    'SIR92 (Altomare et al., 1994)'
_diffrn_ambient_temperature      293
_diffrn_measured_fraction_theta_full 0.402
_diffrn_measured_fraction_theta_max 0.385
_diffrn_measurement_device       'Bruker Kappa Apex2'
_diffrn_measurement_device_type  Area
_diffrn_measurement_method       \w
_diffrn_radiation_monochromator  silicon
_diffrn_radiation_type           synchrotron
_diffrn_radiation_wavelength     0.47690
_diffrn_reflns_av_R_equivalents  0.0452
_diffrn_reflns_limit_h_max       9
_diffrn_reflns_limit_h_min       0
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       0
_diffrn_reflns_limit_l_max       7
_diffrn_reflns_limit_l_min       0
_diffrn_reflns_number            4266
_diffrn_reflns_reduction_process
;
 Scaled and merged with Sortav
 R.H. Blessing, (1987) Cryst. Rev. 1, 3-58
 R.H. Blessing, (1989) J. Appl. Cryst. 22, 396-397
;
_diffrn_reflns_theta_full        15.925
_diffrn_reflns_theta_max         19.906
_diffrn_reflns_theta_min         2.450
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    0.454
_exptl_absorpt_correction_T_max  0.96
_exptl_absorpt_correction_T_min  0.83
_exptl_absorpt_correction_type   multi-scan
_exptl_absorpt_process_details   'SADABS (Siemens, 1996)'
_exptl_crystal_colour            colourless
_exptl_crystal_density_diffrn    1.794
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       block
_exptl_crystal_F_000             392
_exptl_crystal_size_max          0.20
_exptl_crystal_size_mid          0.20
_exptl_crystal_size_min          0.10
_refine_diff_density_max         0.14
_refine_diff_density_min         -0.15
_refine_ls_extinction_method     None
_refine_ls_goodness_of_fit_ref   1.0431
_refine_ls_hydrogen_treatment    mixed
_refine_ls_matrix_type           full
_refine_ls_number_parameters     108
_refine_ls_number_reflns         440
_refine_ls_number_restraints     253
_refine_ls_R_factor_all          0.0408
_refine_ls_R_factor_gt           0.0305
_refine_ls_shift/su_max          0.000189
_refine_ls_structure_factor_coef F
_refine_ls_weighting_details
;
 Method, part 1, Chebychev polynomial, (Watkin, 1994, Prince, 1982)
 [weight] = 1.0/[A~0~*T~0~(x)+A~1~*T~1~(x) ... +A~n-1~]*T~n-1~(x)]
 where A~i~ are the Chebychev coefficients listed below and x= Fcalc/Fmax
 Method = Robust Weighting (Prince, 1982)
 W = [weight] * [1-(deltaF/6*sigmaF)^2^]^2^
 A~i~ are:
 7.54 -6.47 4.82
;
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_all         0.0358
_refine_ls_wR_factor_gt          0.0342
_refine_ls_wR_factor_ref         0.0342
_reflns_number_gt                440
_reflns_number_total             485
_reflns_threshold_expression     I>2.0\s(I)
_cod_data_source_file            ws5073.cif
_cod_data_source_block           CAM0.2GPa
_cod_depositor_comments
;
The following automatic conversions were performed:
'_symmetry_cell_setting' value 'Orthorhombic' changed to 'orthorhombic'
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_enum 1527 2010-12-29 10:47:43Z saulius 

The following automatic conversions were performed:

'_symmetry_cell_setting' value 'Orthorhombic' changed to
'orthorhombic' 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_sg_symbol_H-M      'P 21 21 21 '
_cod_original_formula_sum        'C3 H9 N1 O6 S1'
_cod_database_code               2104651
_cod_database_fobs_code          2104651