Crystallography Open Database
- COD Home
- Accessing COD Data
- Add Your Data
- Documentation
Information card for entry 2104422
Preview
| Coordinates | 2104422.cif |
|---|---|
| Structure factors | 2104422.hkl |
| Original IUCr paper | HTML |
| Common name | tridymite |
|---|---|
| Formula | O2 Si |
| Calculated formula | O2 Si |
| SMILES | [Si]1([O])([O])O[Si]([O])([O])O[Si]([O])([O])O[Si]([O])([O])O[Si]([O])([O])O1 |
| Title of publication | Modulated crystal structure of incommensurate low tridymite |
| Authors of publication | Graetsch, Heribert A. |
| Journal of publication | Acta Crystallographica Section B |
| Year of publication | 2009 |
| Journal volume | 65 |
| Journal issue | 5 |
| Pages of publication | 543 - 550 |
| a | 5.007 ± 0.002 Å |
| b | 8.599 ± 0.002 Å |
| c | 8.2202 ± 0.0016 Å |
| α | 90° |
| β | 91.57 ± 0.02° |
| γ | 90° |
| Cell volume | 353.79 ± 0.18 Å3 |
| Cell temperature | 294 K |
| Ambient diffraction temperature | 293 K |
| Number of distinct elements | 2 |
| Hermann-Mauguin space group symbol | Cc(\a0\g)0 |
| Residual factor for all reflections | 0.0755 |
| Residual factor for significantly intense reflections | 0.0303 |
| Weighted residual factors for significantly intense reflections | 0.0295 |
| Weighted residual factors for all reflections included in the refinement | 0.0359 |
| Goodness-of-fit parameter for all reflections included in the refinement | 0.99 |
| Diffraction radiation wavelength | 0.71073 Å |
| Diffraction radiation type | MoKα |
| Has coordinates | Yes |
| Has disorder | No |
| Has Fobs | Yes |
| Revision | Date | Message | Files |
|---|---|---|---|
| 180904 (current) | 2016-04-02 | hkl/2/10/ (antanas@echidna) Replacing _[local]_cod_* tags with their equivalents from the COD CIF dictionary in multiple entries in subrange 2/10/44. |
2104422.cif 2104422.hkl |
| 176435 | 2016-02-14 | cif/ (antanas@kurmis) Replacing _[local]_cod_* tags with their equivalents from the COD CIF dictionary in multiple entries from ranges 1, 2. |
2104422.cif 2104422.hkl |
| 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" |
2104422.cif 2104422.hkl |
| 91933 | 2013-12-28 | cif/ (saulius@koala.ibt.lt) Adding DOIs that could be assigned unambiguously to the range 2x CIFs. |
2104422.cif 2104422.hkl |
| 88064 | 2013-08-29 | Adding _cod_database_fobs_code data item to all COD CIFs that have Fobs deposited and did not have this data item yet. | 2104422.cif 2104422.hkl |
| 32112 | 2012-02-03 | cif/: committing an update of 45+ thous files, with information appended from the originals. | 2104422.cif 2104422.hkl |
| 26848 | 2011-09-28 | cif/2/, hkl/2/, html/ Reorganising CIFs of the range 2* into the "prefix-directory" tree. |
2104422.cif 2104422.hkl |
| 26029 | 2011-09-17 | cif/2/ Reverting changes of revision 25271: ( cd cif/2/; svn merge -r25271:25270 . ) The problem was that the reprocessed files from IUCr, although were more complete, "resurrected" data errors that were corrected in the previous recisions. The additional data that have been extracted during the reprocessing will have to be merged without overwriting the existing values in COD files, except some explicit and controlled cases (such as publication titles and chemical names). |
2104422.cif 2104422.hkl |
| 25271 | 2011-09-10 | cif/2/ Adding reporocessed IUCr CIFs for the years 1980-2010. The CIFs now contain more complete bibliography, substance names, correctly unfolded text fields (using the CIF line unfolding protocol), explicitely set cell angles, and _cod_data_source_block fields. |
2104422.cif 2104422.hkl |
| 5310 | 2011-01-02 | cif/ Running cif_fix_enum with the core CIF dictionary on COD ranges 2, 8 and 9. Range 9 remained unchanged, and in ranges 2 and 8 there were 17309 modified files, most changes were fixes enumerator case. |
2104422.cif 2104422.hkl |
| 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. |
2104422.cif 2104422.hkl |
| 840 | 2009-11-11 | hkl/ Adding FOBS data for the latest COD deposition. |
2104422.cif 2104422.hkl |
| 838 | 2009-11-11 | cif/2/ Adding files from data processed in Acta-Cryst-B-2009_05/, Acta-Cryst-C-2009_10/, Acta-Cryst-E-2009_10/ and J-Appl-Cryst-2009_05/. |
2104422.cif |
All data in the COD and the database itself are dedicated to the
public domain and licensed under the
CC0
License
.
Users of the data should acknowledge the original authors of the
structural data.