Sodium fluorosilicate
Sodium fluorosilicate is a compound with the chemical formula Na2[SiF6].
 Unit cell of sodium hexafluoridosilicate | |
| Names | |
|---|---|
| Preferred IUPAC name
Sodium fluorosilicate | |
| Systematic IUPAC name
Sodium hexafluoridosilicate(2–)
[1] | |
| Other names
Disodium hexafluorosilicate/sodium fluosilicate/sodium silicofluoride | |
| Identifiers | |
CAS Number |
|
3D model (JSmol) |
|
| ChemSpider | |
| ECHA InfoCard | 100.037.198 |
| EC Number |
|
PubChem CID |
|
| RTECS number |
|
| UNII | |
| UN number | 2674 |
CompTox Dashboard (EPA) |
|
InChI
| |
SMILES
| |
| Properties | |
Chemical formula |
Na2[SiF6] |
| Molar mass | 188 g/mol |
| Appearance | white granular powder |
| Odor | odorless |
| Density | 2.7 g/cm3 |
Solubility in water |
0.64 g/100 mL (20 °C) 1.27 g/100 mL (50 °C) 2.45 g/100 mL (100 °C) |
| Solubility | insoluble in alcohol |
Refractive index (nD) |
1.312 |
| Structure[2] | |
Crystal structure |
trigonal |
Space group |
P321 |
Lattice constant |
a = 8.859, c = 5.038 |
Formula units (Z) |
4 |
| Hazards | |
| NFPA 704 (fire diamond) | 
0
2
0 |
| Lethal dose or concentration (LD, LC): | |
LDLo (lowest published) |
70 mg/kg (mouse, oral) 125 mg/kg (rabbit, oral)[3] |
| Related compounds | |
Other cations |
Ammonium hexafluorosilicate Fluorosilicic acid |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
| Infobox references | |
Natural occurrence
Sodium hexafluorosilicate occurs naturally as the rare mineral malladrite found within some volcanic fumaroles.[4]
Manufacturing
Sodium fluorosilicate is made by neutralizing fluorosilicic acid with sodium chloride or sodium sulfate.
Possible Application
It is used in some countries as additives for water fluoridation, opal glass raw material, ore refining, or other fluoride chemical (like sodium fluoride, magnesium silicofluoride, cryolite, aluminum fluoride) production.[5]
See also
- Fluorosilicic acid
- Ammonium fluorosilicate
References
- "Parent Hydride Names and Substitutive Nomenclature". Nomenclature of Inorganic Chemistry, IUPAC Recommendations 2005 (PDF). RSC Publishing. 2005. pp. 114–135.
- Allan Zalkin, J. D. Forrester, David H. Templeton (1964). "The Crystal Structure of Sodium Fluorosilicate". Acta Crystallographica. 17 (11): 1408–1412. doi:10.1107/S0365110X64003516.CS1 maint: multiple names: authors list (link)
- "Fluorides (as F)". Immediately Dangerous to Life and Health Concentrations (IDLH). National Institute for Occupational Safety and Health (NIOSH).
- https://www.mindat.org/min-2554.html
- "Archived copy". Archived from the original on 2009-03-26. Retrieved 2009-08-10.CS1 maint: archived copy as title (link)
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.