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#(C) 2019 by FIZ Karlsruhe - Leibniz Institute for Information Infrastructure.  All rights reserved.
data_185537-ICSD
_database_code_ICSD 185537
_audit_creation_date 2013-02-01
_chemical_name_systematic 'Lead diniobate'
_chemical_formula_structural 'Pb (Nb2 O6)'
_chemical_formula_sum 'Nb2 O6 Pb1'
_exptl_crystal_density_diffrn 6.67
_publ_section_title

;
Structural characterization of orthorhombic and rhombohedral lead meta-niobate
samples
;
loop_
_citation_id
_citation_journal_full
_citation_year
_citation_journal_volume
_citation_page_first
_citation_page_last
_citation_journal_id_ASTM
primary 'Integrated Ferroelectrics' 2010 120 102 113 IFEREU
loop_
_publ_author_name
'Chakraborty, K.R.'
'Sahu, K.R.'
'De, A.'
'De, U.'
_cell_length_a 10.473(2)
_cell_length_b 10.473(2)
_cell_length_c 11.534(2)
_cell_angle_alpha 90.
_cell_angle_beta 90.
_cell_angle_gamma 120.
_cell_volume 1095.6
_cell_formula_units_Z 9
_symmetry_space_group_name_H-M 'R 3 m H'
_symmetry_Int_Tables_number 160
_refine_ls_R_factor_all 0.146
loop_
_symmetry_equiv_pos_site_id
_symmetry_equiv_pos_as_xyz
1 '-x+y, y, z'
2 'x, x-y, z'
3 '-y, -x, z'
4 '-x+y, -x, z'
5 '-y, x-y, z'
6 'x, y, z'
7 '-x+y+2/3, y+1/3, z+1/3'
8 'x+2/3, x-y+1/3, z+1/3'
9 '-y+2/3, -x+1/3, z+1/3'
10 '-x+y+2/3, -x+1/3, z+1/3'
11 '-y+2/3, x-y+1/3, z+1/3'
12 'x+2/3, y+1/3, z+1/3'
13 '-x+y+1/3, y+2/3, z+2/3'
14 'x+1/3, x-y+2/3, z+2/3'
15 '-y+1/3, -x+2/3, z+2/3'
16 '-x+y+1/3, -x+2/3, z+2/3'
17 '-y+1/3, x-y+2/3, z+2/3'
18 'x+1/3, y+2/3, z+2/3'
loop_
_atom_type_symbol
_atom_type_oxidation_number
Pb2+ 2
Nb5+ 5
O2- -2
loop_
_atom_site_label
_atom_site_type_symbol
_atom_site_symmetry_multiplicity
_atom_site_Wyckoff_symbol
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_B_iso_or_equiv
_atom_site_occupancy
_atom_site_attached_hydrogens
Pb1 Pb2+ 3 a 0 0 -0.02(2) 0.5(4) 1. 0
Pb2 Pb2+ 3 a 0 0 0.32(1) 1.6(5) 1. 0
Pb3 Pb2+ 3 a 0 0 0.65(4) 0.9(4) 1. 0
Nb1 Nb5+ 18 c 0.35(3) 0.35(8) 0.16(6) 1.4(5) 1. 0
O1 O2- 18 c 0.37(3) 0.32(5) 0.019(5) 0.5 1. 0
O2 O2- 9 b 0.56(6) 0.44(8) 0.19(4) 0.5 1. 0
O3 O2- 9 b 0.84(8) 0.16(8) 0.19(8) 0.5 1. 0
O4 O2- 18 c 0.43(4) 0.17(4) 0.52(8) 0.5 0.5 0
O5 O2- 9 b 0.15(4) 0.85(4) 0.16(6) 0.5 1. 0
#End of TTdata_185537-ICSD

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4Â¥: Originally posted by ÐÇ»ðabcd at 2019-10-18 14:46:44
#(C) 2019 by FIZ Karlsruhe - Leibniz Institute for Information Infrastructure.  All rights reserved.
data_185537-ICSD
_database_code_ICSD 185537
_audit_creation_date 2013-02-01
_chemical_name_sys ...

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