Sodium pyrosilicate: Difference between revisions
Jorge Stolfi (talk | contribs) Created article from some refs |
pubchem ids |
||
| Line 11: | Line 11: | ||
| InChI1 = 1S/6Na.O7Si2/c;;;;;;1-8(2,3)7-9(4,5)6/q6*+1;-6 |
| InChI1 = 1S/6Na.O7Si2/c;;;;;;1-8(2,3)7-9(4,5)6/q6*+1;-6 |
||
| InChIKey1 = PMYUVOOOQDGQNW-UHFFFAOYSA-N |
| InChIKey1 = PMYUVOOOQDGQNW-UHFFFAOYSA-N |
||
| CASNo_Ref = {{cascite| |
| CASNo_Ref = {{cascite|correct|pubchem}} |
||
| CASNo = 15593-82-5 |
| CASNo = 15593-82-5 |
||
| UNII_Ref = {{fdacite|changed|FDA}} |
| UNII_Ref = {{fdacite|changed|FDA}} |
||
| UNII = |
| UNII = VNJ6H8MB6Z |
||
| PubChem = |
| PubChem = 61803 |
||
| ChemSpiderID = |
| ChemSpiderID = |
||
| ChemSpiderID_Ref = {{chemspidercite|correct|chemspider}} |
| ChemSpiderID_Ref = {{chemspidercite|correct|chemspider}} |
||
| Line 22: | Line 22: | ||
| ChEBI_Ref = {{ebicite|correct|EBI}} |
| ChEBI_Ref = {{ebicite|correct|EBI}} |
||
| ChEBI = |
| ChEBI = |
||
| StdInChI=1S/6Na.O7Si2/c;;;;;;1-8(2,3)7-9(4,5)6/q6*+1;-6 |
|||
| ⚫ | |||
| StdInChIKey = PMYUVOOOQDGQNW-UHFFFAOYSA-N |
|||
| StdInChI = |
|||
| |
| StdInChI_Ref = {{stdinchicite|correct|pubchem}} |
||
| ⚫ | |||
| StdInChIKey = |
|||
| SMILES = Si](O[Si]([O-])([O-])[O-])([O-])([O-])[O-].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+] |
| SMILES = Si](O[Si]([O-])([O-])[O-])([O-])([O-])[O-].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+] |
||
| Gmelin = |
| Gmelin = |
||
Revision as of 07:30, 27 May 2018
| Names | |
|---|---|
| Other names
hexasodium diorthosilicate
| |
| Identifiers | |
3D model (JSmol)
|
|
| EC Number |
|
PubChem CID
|
|
| UNII | |
| |
| Properties | |
| Na6O7Si2 | |
| Molar mass | 306.102 g·mol−1 |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
| |
Sodium pyrosilicate is the chemical compound Na
6Si
2O
7. It is one of the sodium silicates, specifically a pyrosilicate, formally a salt of the unstable pyrosilicic acid H
6Si
2O
7.[1][2]
Structure
The anhydrous solid has the triclinic crystal structure, with space group P−
1 (a = 5.8007(8) Å, b = 11.5811(15) Å, c = 23.157(3) Å, α = 89.709(10)°, β = 88.915(11)°, γ = 89.004(11)°, V = 1555.1(4) Å3, Z = 8, Dx = 2.615 g·cm–3, μ(Mo‐Kα) = 7.94 cm–1). The Si
2O6+
7 anions are arranged in layers parallel to the (100) plane, with the sodium cations distributed in 24 distinct crystallographic positons, coordinated by 4 to 6 near oxygen atoms. Some of the 4-coordinated sodium atoms can be interpreted as parallel columns of edge-sharing NaO
4 tetrahedra. The columnar arrangement forms tunnels that house the remaining sodium cations. Twinning at a microscopic scale simulates a a much larger monoclinic C centered lattice (V′ = 6220 Å3, Z = 32). [3]
See also
- Sodium metasilicate, Na
2SiO
3 - Sodium orthosilicate, Na
4SiO
4
References
- ^ Myron C Waddell (1932): "Process of purifying technical sodium pyrosilicate hydrates". US patent US1931364A.
- ^ J. F. Schairer and N. L. Bowen (1956): "The system Na
2O—Al
2O
3—SiO
2". American Journal of Science, volume 254, issue 3, pages 129-195 doi:10.2475/ajs.254.3.129 - ^ Volker Kahlenberg, Thomas Langreiter, and Erik Arroyabe (2010): "Na6Si2O7 – The Missing Structural Link among Alkali Pyrosilicates". Zeitschrift für anorganishe und allgemeine Chemie (Journal for Inorganic and General Chemistry), volume 636, issue 11, pages 1974-1979. doi:10.1002/zaac.201000120