Rubidium nitrate
Unit cell of rubidium nitrate
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Names | |
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IUPAC name
Rubidium nitrate
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Identifiers | |
3D model (JSmol)
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ChemSpider | |
ECHA InfoCard | 100.032.767 |
EC Number |
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PubChem CID
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RTECS number |
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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] | |
−41.0·10−6 cm3/mol | |
Refractive index (nD)
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1.524 |
Structure[2] | |
trigonal | |
P31 | |
a = 10.474 Å, c = 7.443 Å
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Lattice volume (V)
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707.2 Å3 |
Hazards | |
Occupational safety and health (OHS/OSH): | |
Main hazards
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Oxidant |
NFPA 704 (fire diamond) | |
Flash point | Non-flammable |
Lethal dose or concentration (LD, LC): | |
LD50 (median dose)
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4625 mg/kg (rat, oral) |
Related compounds | |
Other anions
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Rubidium sulfate Rubidium chloride |
Other cations
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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).
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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.
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