Rubidium nitrate
From Wikipedia the free encyclopedia
 | |
 Unit cell of rubidium nitrate | |
| Names | |
|---|---|
| IUPAC name Rubidium nitrate | |
| Identifiers | |
3D model (JSmol) | |
| ChemSpider | |
| ECHA InfoCard | 100.032.767 |
| EC Number |
|
PubChem CID | |
| RTECS number |
|
CompTox Dashboard (EPA) | |
| |
| |
| Properties | |
| RbNO3 | |
| Molar mass | 147.473 g/mol |
| Appearance | White hygroscopic solid |
| Density | 3.11 g/cm3 |
| Melting point | 310 °C (590 °F; 583 K) decomposes |
| Boiling point | 578 °C (1,072 °F; 851 K) |
| 44.28 g/100 mL (16 °C) 65.0 g/100 mL (25 °C)[1] | |
| −41.0·10−6 cm3/mol | |
Refractive index (nD) | 1.524 |
| Structure[2] | |
| trigonal | |
| P31 | |
a = 10.474 Å, c = 7.443 Å | |
Lattice volume (V) | 707.2 Å3 |
| Hazards | |
| Occupational safety and health (OHS/OSH): | |
Main hazards | Oxidant |
| NFPA 704 (fire diamond) | |
| Flash point | Non-flammable |
| Lethal dose or concentration (LD, LC): | |
LD50 (median dose) | 4625 mg/kg (rat, oral) |
| Related compounds | |
Other anions | Rubidium sulfate Rubidium chloride |
Other cations | Lithium nitrate Sodium nitrate Potassium nitrate Caesium nitrate |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
Rubidium nitrate is an inorganic compound with the formula RbNO3. This alkali metal nitrate salt is white and highly soluble in water.
Properties
[edit]
Rubidium nitrate is a white crystalline powder that is highly soluble in water and very slightly soluble in acetone. In a flame test, RbNO3 gives a mauve/light purple colour.
Uses
[edit]Rubidium compounds have very few applications.[1] Like caesium nitrate, it is used in infrared radiation optics, in pyrotechnic compositions as a pyrotechnic colorant and as an oxidizer, e.g. in decoys and illumination flares although it is rarely used in fireworks to produce a red-violet colour. It is also used as a raw material for preparation of other rubidium compounds and rubidium metal, for manufacture of catalysts and in scintillation counters.
Production
[edit]RbNO3 can be prepared either by dissolving rubidium metal, its hydroxide or carbonate in nitric acid.
- RbOH + HNO3 → RbNO3 + H2O
- Rb2CO3 + 2 HNO3 → 2 RbNO3 + CO2 + H2O
- 2 Rb + 2 HNO3 → 2 RbNO3 + H2
References
[edit]- ^ a b W. Lenk, H. Prinz, A. Steinmetz,"Rubidium and Rubidium Compounds" in Ullmann's Encyclopedia of Industrial Chemistry, 2010 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim. doi:10.1002/14356007.a23_473.pub2
- ^ Jutta Pohl, Dieter Pohl, Gunadi Adiwidjaja (1992). "Phase Transition in Rubidium Nitrate at 346 K and Structure at 296, 372, 413 and 437 K". Acta Crystallographica Section B. B48 (2): 160–166. doi:10.1107/S0108768191013459.
{{cite journal}}: CS1 maint: multiple names: authors list (link)