Crystallography Open Database

Information card for entry 9016740

Preview

Coordinates	9016740.cif
External links	AMCSD; Wikidata; Wikipedia

Structure parameters

Mineral name	Cahnite
Formula	As B Ca2 H4 O8
Calculated formula	As B Ca2 H4 O8
Title of publication	The crystal structure of cahnite, Ca2BAsO4(OH)4
Authors of publication	Prewitt, C. T.; Buerger, M. J.
Journal of publication	American Mineralogist
Year of publication	1961
Journal volume	46
Pages of publication	1077 - 1085
a	7.11 Å
b	7.11 Å
c	6.2 Å
α	90°
β	90°
γ	90°
Cell volume	313.423 Å³
Number of distinct elements	5
Space group number	82
Hermann-Mauguin space group symbol	I -4
Hall space group symbol	I -4
Duplicate of	9000094
Has coordinates	Yes
Has disorder	No
Has F_obs	No

Version history

Revision	Date	Message	Files
283658 (current)	2023-05-10	cod/ (saulius@tasmanijos-velnias) Estimating atom types and attached hydrogen counts using the new cod-tools scripts [1], for those AMCSD files that had Wat or O-H or OW atoms, and where declared and computed formula matches after the update. Several files were spotted manually where attached hydrogen counts will need to be updated to match the title formula. The update command was: 553 ( set -x; directory-metadata; grep ^9 formula-with-estimated-atoms-all.tsv \| grep = \| awk '{print $1}' \| sort -u \| codid2file \| xargs -i bash -c 'Z=$(cifvalues --no-dataname --tag _cell_formula_units_Z {}); if [ $Z = "?" ]; then NEW_Z=$(cif_estimate_Z {}); fi; cif_guess_AMCSD_atom_types {} \| (if [ $Z = "?" -a -n "$NEW_Z" ]; then cif_select --invert --tag _cell_formula_units_Z \| cat - <(echo _cell_formula_units_Z $NEW_Z); else cat; fi) \| cif_filter --add-cif-header {} \| sponge {}; echo Updated: {}'; date ) &> update-files-with-matching-formulae.log & run in the working copy of the repo [2]. Ref.: [1] saulius@tasmanijos-velnias COD/ $ svn info ~/src/cod-tools Path: /home/saulius/src/cod-tools Working Copy Root Path: /home/saulius/src/cod-tools URL: svn://cod.ibt.lt/cif-tools/trunk Relative URL: ^/trunk Repository Root: svn://cod.ibt.lt/cif-tools Repository UUID: 04be6746-3802-0410-999d-98508da1e98c Revision: 9577 Node Kind: directory Schedule: normal Last Changed Author: saulius Last Changed Rev: 9577 Last Changed Date: 2023-05-10 16:36:19 +0300 (Wed, 10 May 2023) [2] saulius@tasmanijos-velnias cod-entries-Wat-O-H-atoms/ $ svn info Path: . Working Copy Root Path: /home/saulius/tmp URL: svn+ssh://saulius.grazulis.lt/home/saulius/svn-repositories/tmp/COD/cod-entries-Wat-O-H-atoms Relative URL: ^/COD/cod-entries-Wat-O-H-atoms Repository Root: svn+ssh://saulius.grazulis.lt/home/saulius/svn-repositories/tmp Repository UUID: d3bd5daf-38a0-45fb-a3f8-6742599c9cef Revision: 580 Node Kind: directory Schedule: normal Last Changed Author: saulius Last Changed Rev: 580 Last Changed Date: 2023-05-06 10:43:38 +0300 (Sat, 06 May 2023)	9016740.cif
282180	2023-04-01	cif/9/ (saulius@tasmanijos-velnias) Adding links to Wikidata and Wikipedia.	9016740.cif
282179	2023-04-01	cif/9/ (saulius@tasmanijos-velnias) Making entry 9016740 as a duplicate of 9000094. Unifying information in both entires. Fixing chemical formulea and hydrogen counts.	9016740.cif
282074	2023-03-27	cod/ (saulius@kukutis) Syncronising the AMCSD and the COD: depositing those AMCSD files that are genuinely new (i.e. do not have corresponding COD entries when compared using DOI, atomic coordinates, cell parameters and symmetry).	9016740.cif