Crystallography Open Database

Information card for entry 1100917

Preview

Coordinates	1100917.cif
Original paper (by DOI)	HTML
External links	AMCSD

Structure parameters

Chemical name	silver niobate
Formula	Ag Nb O3
Calculated formula	Ag Nb O3
Title of publication	Structural study of AgNbO~3~ at room temperature
Authors of publication	Fabry, Jan; Zikmund, Zdenek; Kania, Antoni; Petricek, Vaclav
Journal of publication	Acta Crystallographica, Section C
Year of publication	2000
Journal volume	56
Pages of publication	916 - 918
a	5.5462 ± 0.0003 Å
b	5.6028 ± 0.0004 Å
c	15.6365 ± 0.0013 Å
α	90°
β	90°
γ	90°
Cell volume	485.9 ± 0.06 Å³
Cell temperature	292 ± 1 K
Number of distinct elements	3
Space group number	57
Hermann-Mauguin space group symbol	P b c m
Hall space group symbol	-P 2c 2b
Residual factor for significantly intense reflections	0.034
Weighted residual factors for all reflections included in the refinement	0.053
Goodness-of-fit parameter for all reflections	2.69
Goodness-of-fit parameter for all reflections included in the refinement	2.84
Diffraction radiation wavelength	0.71073 Å
Diffraction radiation type	MoKα
Duplicate of	1100916
Has coordinates	Yes
Has disorder	No
Has F_obs	No

Version history

Revision	Date	Message	Files
134621 (current)	2015-04-02	The 'cif_fix_values' script with an option '--fix-only-weighting-scheme' and 'cif_filter' script were run over CIF files which included an incorrect value of the data item '_refine_ls_weighting_scheme'. Read the log for more details. There were more than 18k CIF files with values to modify. Usually these incorrect values include comment with formulas, but values of this data item must be an enumerator. The script creates new data item '_refine_ls_weighting_details' to store these comments with formulas, and writes the enumerator 'calc' as a value of data item '_refine_ls_weighting_scheme'. There exists some exceptions in the script.	1100917.cif
130149	2015-01-27	cod/ (saulius@kolibris) Deriving Hall space group symbols for 12003 CIFs using the 'cif_filter --estimate-spacegroup' command.	1100917.cif
129439	2015-01-07	cod/ (robertas@burundukas) Correcting values of _exptl_crystal_density_meas and _exptl_crystal_density_method data items: codsql "select codid from validation where message like '%\\'_exptl_crystal_density_meas\\' value \"not measured\" is %'" -NB \ \| codid2file \ \| xargs perl -i -pe "s/_exptl_crystal_density_meas\\s+'not +measured'/_exptl_crystal_density_meas ?/i; \ s/_exptl_crystal_density_method\\s+('not +measured'\|\\?\|none)/_exptl_crystal_density_method ./i"	1100917.cif
125874	2014-10-25	cod/ (saulius@kolibris) Adding DOIs to 358 Acta Cryst. C CIFs, found using ISSN, volume and first page.	1100917.cif
112050	2014-04-29	cod/ (saulius@koala.ibt.lt) Marking 392 files as duplicates of the COD entries (with smaller COD IDs) that had identical title, cell constants and coordinates: mysql -u cod_reader cod -e ' select d1.file, d2.file from data as d1 join data as d2 on ( d1.title = d2.title or d1.title = substr(d2.title,1,length(d2.title)-1) or d2.title = substr(d1.title,1,length(d1.title)-1)) and d1.file < d2.file and d1.a = d2.a and d1.b = d2.b and d1.c = d2.c and d1.vol = d2.vol and (d1.calcformula = d2.calcformula or d1.calcformula is null or d2.calcformula is null) and d1.duplicateof is null and d2.duplicateof is null and d1.optimal is null and d2.optimal is null order by d1.file, d2.file' -NB \ \| xargs -i bash -c ' F1=$(echo {} \| awk "{print \$1}" \| codid2file); F2=$(echo {} \| awk "{print \$2}"\| codid2file); true echo === {} ===; if diff -q <(cif2ref $F1) <(cif2ref $F2) >& /dev/null; then CODID=$(echo {} \| awk "{print \$1}"); echo $CODID is the main entry for $F2; echo "_cod_duplicate_entry $CODID" >> $F2; fi' The localhost `cod` database's table `data` was loaded with the last night's COD `data` dump.	1100917.cif
35911	2012-02-28	cif/ Reorganising ranges 1, 3, 5, 6 and 8 into a prefix-directory tree.	1100917.cif
5312	2011-01-03	cif/ Adding files, updated with the 'cif_fix_enum' program and the cif_core.dic dictionary. The enumerator values were fixed, mostly incorrect case, but also some values that had extra underscores, dashes or spaces. Unfortunately, 22 had non-ASCII characters with the 8-th bit set, and these got incorrectly interpreted as latin1 characters and converted to their UTF8 equivalents by Perl. To fix the structures, however, they need to be redeposited from the original files with the new CIFParser/cif_filter version.	1100917.cif
966	2010-01-30	cif/ Adding _cod_database_code tags to all COD entries. Adding tag description to the cif_cod.dic dictionary so that COD entries can be validated.	1100917.cif
936	2009-12-10	cif/ Converting all simple fractions (such as 1/4) into decimal fractions (in case of 1/4 that would be 0.25). A shell script that was used for conversion (eval_numeric_fields.com) is also provided. One file (4/4300051.cif) was misinterpreted by the Perl's eval() function (due to completely crazy error in the CIF file, no problem with Perl), therefore it was corrected by hand.	1100917.cif
19	2008-01-26	Changing all end-of-line codes from DOS style to UNIX style in all COD CIF files, for more convenient processing: In the cod/cif/ directory: ff \*.cif \| xargs perl -i -pe 's/\r\n/\n/'	1100917.cif
14	2008-01-14	Appending a header with SVN keywords, COD URL and copying policy to all COD CIF files.	1100917.cif
13	2008-01-13	Setting the svn:keywords property to "Author Date Revision URL Id" for all CIF files in the cod/cif directory.	1100917.cif
1	2007-11-30	Adding all .cif files from the COD, downloaded in a Cod.zip file on 2007.02.07 (and the same Cod.zip is downloadable today, on 2007.11.29)	1100917.cif