Rubidium nitrate is an inorganic compound with the formula RbNO3. This alkali metal nitrate salt is white and highly soluble in water.
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 Unit cell of rubidium nitrate | |
| Names | |
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| IUPAC name
Rubidium nitrate | |
| Identifiers | |
3D model (JSmol) |
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| ECHA InfoCard | 100.032.767 
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PubChem CID |
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CompTox Dashboard (EPA) |
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| 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] | |
| −41.0·10−6cm3/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 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.
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.indecoys 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.
RbNO3 can be prepared either by dissolving rubidium metal, its hydroxide or carbonate in nitric acid.
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