Structure of the clinopyroxene-type compound CaCuGe~2~O~6~ between 15 and 800K
Redhammer, G. J.; Tippelt, G.; Merz, M.; Roth, G.; Treutmann, W.; Amthauer, G.; Acta Crystallographica Section B 61 (2005) 367–380; doi:10.1107/S0108768105013455

data_2100255
_publ_section_title
;
 Structure of the clinopyroxene-type compound CaCuGe~2~O~6~ between 15
 and 800K
;
_journal_coeditor_code           WS5021
_journal_issue                   4
_journal_name_full               'Acta Crystallographica Section B'
_journal_page_first              367
_journal_page_last               380
_journal_paper_doi               10.1107/S0108768105013455
_journal_volume                  61
_journal_year                    2005
_chemical_formula_moiety         'Ca Cu Ge2 O6'
_chemical_formula_sum            'Ca Cu Ge2 O6'
_chemical_formula_weight         344.8
_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'
_audit_creation_method           'WinGX routine CIF_UPDATE'
_cell_angle_alpha                90
_cell_angle_beta                 105.964(12)
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   10.2170(12)
_cell_length_b                   9.2515(7)
_cell_length_c                   5.2446(6)
_cell_measurement_reflns_used    2243
_cell_measurement_temperature    646(2)
_cell_measurement_theta_max      27.69
_cell_measurement_theta_min      2.12
_cell_volume                     476.62(9)
_computing_cell_refinement       'Stoe X-Area (Stoe & Cie, 1998)'
_computing_data_collection       'Stoe X-Area (Stoe & Cie, 1998)'
_computing_data_reduction        'Stoe X-Area (Stoe & Cie, 1998)'
_computing_molecular_graphics    'Diamond 2.0e (Berndt & Brandenburg, 1996)'
_computing_publication_material  'WinGX 1.64.05 (Farrugia, 1999)'
_computing_structure_refinement  'SHELXL-97 (Sheldrick, 1997)'
_computing_structure_solution    'SHELXS-97 (Sheldrick, 1997)'
_diffrn_ambient_temperature      100
_diffrn_detector_area_resol_mean 6.67
_diffrn_measured_fraction_theta_full 0.902
_diffrn_measured_fraction_theta_max 0.902
_diffrn_measurement_device       '1-circle goniometer'
_diffrn_measurement_device_type  'STOE IPDS 1'
_diffrn_measurement_method       'rotation method'
_diffrn_radiation_monochromator  'plane graphite'
_diffrn_radiation_type           'Mo K\a'
_diffrn_radiation_wavelength     0.71073
_diffrn_reflns_av_R_equivalents  0.0599
_diffrn_reflns_limit_h_max       13
_diffrn_reflns_limit_h_min       -13
_diffrn_reflns_limit_k_max       12
_diffrn_reflns_limit_k_min       -12
_diffrn_reflns_limit_l_max       6
_diffrn_reflns_limit_l_min       -6
_diffrn_reflns_number            4880
_diffrn_reflns_theta_full        27.83
_diffrn_reflns_theta_max         27.83
_diffrn_reflns_theta_min         3.02
_diffrn_standards_decay_%        0
_diffrn_standards_interval_count 0
_diffrn_standards_interval_time  0
_diffrn_standards_number         0
_exptl_absorpt_coefficient_mu    17.981
_exptl_absorpt_correction_T_max  0.158
_exptl_absorpt_correction_T_min  0.094
_exptl_absorpt_correction_type   empirical
_exptl_absorpt_process_details   'X-SHAPE (Stoe & Cie, 1996)'
_exptl_crystal_colour            'pale green'
_exptl_crystal_density_diffrn    4.805
_exptl_crystal_density_method    'not measured'
_exptl_crystal_description       cuboid
_exptl_crystal_F_000             644
_exptl_crystal_size_max          0.14
_exptl_crystal_size_mid          0.13
_exptl_crystal_size_min          0.10
_refine_diff_density_max         1.054
_refine_diff_density_min         -1.038
_refine_ls_extinction_coef       0.0058(7)
_refine_ls_extinction_expression Fc^*^=kFc[1+0.001xFc^2^\l^3^/sin(2\q)]^-1/4^
_refine_ls_extinction_method     SHELXL
_refine_ls_goodness_of_fit_ref   1.099
_refine_ls_hydrogen_treatment    none
_refine_ls_matrix_type           full
_refine_ls_number_parameters     92
_refine_ls_number_reflns         1020
_refine_ls_number_restraints     0
_refine_ls_restrained_S_all      1.099
_refine_ls_R_factor_gt           0.0447
_refine_ls_shift/su_max          0
_refine_ls_structure_factor_coef Fsqd
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0310P)^2^+3.7693P] where P=(Fo^2^+2Fc^2^)/3'
_refine_ls_weighting_scheme      calc
_refine_ls_wR_factor_ref         0.0856
_reflns_number_gt                764
_reflns_number_total             1020
_reflns_threshold_expression     >2sigma(I)
_cod_data_source_file            ws5021.cif
_cod_data_source_block           cacu_646K
_cod_original_cell_volume        476.61(9)
_cod_original_sg_symbol_H-M      'P 21/c'
_cod_database_code               2100255