Barium phosphate
| Names | |
|---|---|
| IUPAC name
Barium phosphate
| |
| Other names
Barium orthophosphate
| |
| Identifiers | |
3D model (JSmol)
|
|
| ChemSpider | |
| ECHA InfoCard | 100.033.491 |
| EC Number |
|
PubChem CID
|
|
CompTox Dashboard (EPA)
|
|
| |
| |
| Properties | |
| Ba3(PO4)2 | |
| Molar mass | 601.9 g/mol |
| Appearance | Powder |
| Structure | |
| Rhombohedral | |
| R3m | |
| Hazards | |
| GHS labelling:[1] | |
| Warning | |
| H302, H332 | |
| P261, P264, P270, P271, P301+P317, P304+P340, P317, P330, P501 | |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references
| |
Barium phosphate, also known as barium orthophosphate, is an inorganic phosphate of barium with the molecular formula Ba3(PO4)2. It is usually found as a white, odorless powder which is insoluble in water.[1]
Synthesis
The general chemical reaction for the synthesis of barium phosphate powder, using the sol-gel process, is:[2]
3 Ba(NO3)2 + 2 NH4H2PO4 → Ba3(PO4)2 + 2 NH4NO3 + 4 HNO3
Barium phosphate is formed as a precipitate.
Structure
Its crystal structure is rhombohedral with a space group of R3m, identical to that of strontium phosphate.[3]
Properties
Barium phosphate exhibits properties such as high refractive index, low melting point, low glass transition temperature, high transparency to ultraviolet light, and high thermal expansion coefficient.[4]
Applications
Barium phosphate finds uses in industrial applications, including optical applications like preparation of glasses with special properties for pulsed lasers, and preparation of solders for glass to glass bonding. It can also be used in development of hydrogen / fuel sensors.[4]
See also
References
- ^ "Barium Phosphate: Versatile Uses and Key Benefits". Eureka. Retrieved 11 March 2025.
- ^ "Ba3(PO4)2 Photocatalyst for Efficient Photocatalytic Application" (PDF). p. 9. Retrieved 23 April 2025.
- ^ Zachariasen, W. H. (2 November 1948). "The crystal structure of the normal orthophosphates of barium and strontium". Acta Crystallographica. 1 (5): 263–265. doi:10.1107/S0365110X48000697.
- ^ a b "Barium Phosphate Powder". Sigma Aldrich. Retrieved 12 March 2025.