#------------------------------------------------------------------------------
#$Date: 2016-04-02 04:17:53 +0300 (Sat, 02 Apr 2016) $
#$Revision: 180695 $
#$URL: svn://www.crystallography.net/cod/cif/2/10/74/2107489.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_2107489
loop_
_publ_author_name
'Hejny, Clivia'
'Kahlenberg, Volker'
'Eberhard, Tim'
'Krüger, Hannes'
_publ_section_title
;
 Melilite-like modulation and temperature-dependent evolution in the
 framework structure of K₂Sc[Si₂O₆]F
;
_journal_coeditor_code           DK5040
_journal_issue                   2
_journal_name_full               'Acta Crystallographica Section B'
_journal_page_first              209
_journal_page_last               222
_journal_paper_doi               10.1107/S2052520615024865
_journal_volume                  72
_journal_year                    2016
_chemical_formula_sum            'F K2 O6 Sc Si2'
_chemical_formula_weight         294.3
_chemical_name_systematic        ' ?'
_space_group_IT_number           136
_symmetry_cell_setting           tetragonal
_symmetry_Int_Tables_number      136
_symmetry_space_group_name_Hall  '-P 4n 2n'
_symmetry_space_group_name_H-M   'P 42/m n m'
_cell_angle_alpha                90
_cell_angle_beta                 90
_cell_angle_gamma                90
_cell_formula_units_Z            4
_cell_length_a                   8.98780(10)
_cell_length_b                   8.98780(10)
_cell_length_c                   8.2694(2)
_cell_measurement_temperature    293
_cell_volume                     668.007(19)
_diffrn_ambient_temperature      293
_diffrn_measured_fraction_theta_full 0.64
_diffrn_measured_fraction_theta_max 0.64
_diffrn_radiation_probe          x-ray
_diffrn_radiation_source         'X-ray tube'
_diffrn_radiation_type           'Mo K\a'
_diffrn_radiation_wavelength     0.71069
_diffrn_reflns_av_R_equivalents  0.0527
_diffrn_reflns_av_unetI/netI     0.0008
_diffrn_reflns_limit_h_max       11
_diffrn_reflns_limit_h_min       -11
_diffrn_reflns_limit_k_max       11
_diffrn_reflns_limit_k_min       -11
_diffrn_reflns_limit_l_max       10
_diffrn_reflns_limit_l_min       -10
_diffrn_reflns_number            3100
_diffrn_reflns_theta_full        26.64
_diffrn_reflns_theta_max         26.64
_diffrn_reflns_theta_min         3.21
_exptl_absorpt_coefficient_mu    2.71
_exptl_crystal_density_diffrn    2.9255
_exptl_crystal_F_000             576
_refine_diff_density_max         0.19
_refine_diff_density_min         -0.24
_refine_ls_extinction_coef       100000(30000)
_refine_ls_extinction_method
'B-C type 1 Gaussian isotropic (Becker & Coppens, 1974)'
_refine_ls_goodness_of_fit_gt    3.95
_refine_ls_goodness_of_fit_ref   3.95
_refine_ls_number_constraints    0
_refine_ls_number_parameters     40
_refine_ls_number_reflns         264
_refine_ls_number_restraints     0
_refine_ls_R_factor_all          0.0290
_refine_ls_R_factor_gt           0.0290
_refine_ls_shift/su_max          0.0269
_refine_ls_shift/su_mean         0.0131
_refine_ls_structure_factor_coef F
_refine_ls_weighting_details     w=1/(σ²(F)+0.0001F²)
_refine_ls_weighting_scheme      sigma
_refine_ls_wR_factor_gt          0.0528
_refine_ls_wR_factor_ref         0.0528
_reflns_number_gt                264
_reflns_number_total             264
_reflns_threshold_expression     I>3σ(I)
_cod_data_source_file            dk5040sup1.cif
_cod_data_source_block           II_rt
_cod_depositor_comments
;
The following automatic conversions were performed:

'_diffrn_radiation_probe' value 'X-ray' changed to 'x-ray' according
to
/usr/data/users/saulius/crontab/automatic-downloads/rss-feeds/IUCr/lib/dictionaries/cif_core.dic
dictionary named 'cif_core.dic' version 2.4.2 from 2011-04-26.

Automatic conversion script
Id: cif_fix_values 4268 2015-11-12 08:31:59Z antanas 
;
_cod_original_sg_symbol_Hall     '-P 4n;-2n'
_cod_original_sg_symbol_H-M      'P 42/m 21/n 2/m'
_cod_original_formula_sum        'F1 K2 O6 Sc1 Si2'
_cod_database_code               2107489
loop_
_symmetry_equiv_pos_site_id
_symmetry_equiv_pos_as_xyz
1 x,y,z
2 -x,-y,z
3 -y+1/2,x+1/2,z+1/2
4 y+1/2,-x+1/2,z+1/2
5 -x+1/2,y+1/2,-z+1/2
6 x+1/2,-y+1/2,-z+1/2
7 y,x,-z
8 -y,-x,-z
9 -x,-y,-z
10 x,y,-z
11 y+1/2,-x+1/2,-z+1/2
12 -y+1/2,x+1/2,-z+1/2
13 x+1/2,-y+1/2,z+1/2
14 -x+1/2,y+1/2,z+1/2
15 -y,-x,z
16 y,x,z
loop_
_atom_site_label
_atom_site_type_symbol
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_adp_type
_atom_site_U_iso_or_equiv
_atom_site_site_symmetry_multiplicity
_atom_site_occupancy
_atom_site_calc_flag
Sc Sc 0.5 0 0.25 Uani 0.0087(3) 4 1 d
K1 K 0.79325(5) 0.20675(5) 0 Uani 0.0256(4) 4 1 d
K2 K 0.34263(6) 0.34263(6) 0 Uani 0.0365(4) 4 1 d
Si Si 0.12233(4) 0.12233(4) 0.19652(6) Uani 0.0093(3) 8 1 d
O1 O 0 0 0.2604(3) Uani 0.0237(8) 4 1 d
O2 O 0.11596(17) 0.11596(17) 0 Uani 0.0239(6) 4 1 d
F F 0.5 0 0 Uani 0.0249(9) 4 1 d
O3 O 0.07211(18) 0.28113(15) 0.25936(14) Uani 0.0281(5) 16 1 d
loop_
_atom_type_symbol
_atom_type_scat_dispersion_real
_atom_type_scat_dispersion_imag
_atom_type_scat_source
F 0.0171 0.0103 'International Tables Vol C tables 4.2.6.8 and 6.1.1.1'
K 0.2009 0.2494 'International Tables Vol C tables 4.2.6.8 and 6.1.1.1'
O 0.0106 0.0060 'International Tables Vol C tables 4.2.6.8 and 6.1.1.1'
Sc 0.2519 0.3716 'International Tables Vol C tables 4.2.6.8 and 6.1.1.1'
Si 0.0817 0.0704 'International Tables Vol C tables 4.2.6.8 and 6.1.1.1'
loop_
_geom_bond_atom_site_label_1
_geom_bond_atom_site_label_2
_geom_bond_site_symmetry_2
_geom_bond_distance
Sc F . 2.06735(10)
Sc F 3_545 2.06735(10)
Sc O3 5_545 2.0726(14)
Sc O3 6_555 2.0726(14)
Sc O3 15_655 2.0726(14)
Sc O3 16_555 2.0726(14)
K1 O3 4_554 2.8146(14)
K1 O3 6_555 2.8146(14)
K1 O3 11_555 2.8146(14)
K1 O3 13_554 2.8146(14)
K2 O1 3_554 2.8156(19)
K2 O1 5_555 2.8156(19)
K2 O2 . 2.8811(16)
Si O1 . 1.6421(9)
Si O2 . 1.6271(5)
Si O3 . 1.5846(14)
Si O3 16_555 1.5846(14)
