Rubidium nitrate

Rubidium nitrate is an inorganic compound with the formula RbNO₃. This alkali metal nitrate salt is white and highly soluble in water.

Rubidium nitrate

Unit cell of rubidium nitrate
Names
IUPAC name Rubidium nitrate
Identifiers
CAS Number	13126-12-0 Y
3D model (JSmol)	Interactive image
ChemSpider	23971 Y
ECHA InfoCard	100.032.767
EC Number	236-060-1
PubChem CID	25731
RTECS number	QV0900000
CompTox Dashboard (EPA)	DTXSID30884577
InChI InChI=1S/NO3.Rb/c2-1(3)4;/q-1;+1 Y Key: RTHYXYOJKHGZJT-UHFFFAOYSA-N Y InChI=1S/NO3.Rb/c2-1(3)4;/q-1;+1 Key: RTHYXYOJKHGZJT-UHFFFAOYAE Key: RTHYXYOJKHGZJT-UHFFFAOYSA-N
SMILES [Rb+].[O-][N+]([O-])=O
Properties
Chemical formula	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)
Solubility in water	44.28 g/100 mL (16 °C) 65.0 g/100 mL (25 °C)[1]
Magnetic susceptibility (χ)	−41.0·10−6 cm3/mol
Refractive index (nD)	1.524
Structure[2]
Crystal structure	trigonal
Space group	P31
Lattice constant	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)	1 0 0 OX
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). Y verify (what is YN ?) Infobox references

Properties

Solubility of rubidium nitrate in water

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

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

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