Rubidium nitrate

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Chemical compound RbNO<sub>3</sub>

title: "Rubidium nitrate" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["rubidium-compounds", "nitrates", "pyrotechnic-oxidizers", "pyrotechnic-colorants"] description: "Chemical compound RbNO3" topic_path: "general/rubidium-compounds" source: "https://en.wikipedia.org/wiki/Rubidium_nitrate" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0

::summary Chemical compound RbNO3 ::

| Watchedfields = changed | verifiedrevid = 464384326 | ImageFile = RbNO3-xtal-1992-CM-3D-sf.png | ImageFile1 = Rubidiumnitrat.png | ImageSize1 = 250px | ImageCaption1 = Unit cell of rubidium nitrate | ImageAlt1 = Unit cell | IUPACName = Rubidium nitrate | OtherNames = |Section1={{Chembox Identifiers | ChemSpiderID_Ref = | ChemSpiderID = 23971 | InChI = 1S/NO3.Rb/c2-1(3)4;/q-1;+1 | InChIKey = RTHYXYOJKHGZJT-UHFFFAOYAE | SMILES = [Rb+].[O-]N+=O | StdInChI_Ref = | StdInChI = 1S/NO3.Rb/c2-1(3)4;/q-1;+1 | StdInChIKey_Ref = | StdInChIKey = RTHYXYOJKHGZJT-UHFFFAOYSA-N | InChIKey1 = RTHYXYOJKHGZJT-UHFFFAOYSA-N | CASNo = 13126-12-0 | CASNo_Ref = | EINECS = 236-060-1 | PubChem = 25731 | RTECS = QV0900000 |Section2={{Chembox Properties | Formula = RbNO3 | MolarMass = 147.473 g/mol | Appearance = White hygroscopic solid | Density = 3.11 g/cm3 | MeltingPtC = 310 | MeltingPt_notes = decomposes | BoilingPtC = 578 | BoilingPt_notes = | Solubility = 44.28 g/100 mL (16 °C) 65.0 g/100 mL (25 °C) | Solubility1 = very slightly soluble | Solvent1 = acetone | RefractIndex = 1.524 | MagSus = −41.0·10−6 cm3/mol | Section3 = {{Chembox Structure | Structure_ref = | CrystalStruct = trigonal | SpaceGroup = P31 | PointGroup = | LattConst_a = 10.474 Å | LattConst_b = | LattConst_c = 7.443 Å | LattConst_alpha = | LattConst_beta = | LattConst_gamma = | LattConst_ref = | LattConst_Comment = | UnitCellVolume = 707.2 Å3 | UnitCellFormulas = | Coordination = | MolShape = | OrbitalHybridisation = | Dipole = |Section7={{Chembox Hazards | ExternalSDS = | GHS_ref = | GHSPictograms = | GHSSignalWord = Danger | HPhrases = | PPhrases = | MainHazards = Oxidant | NFPA-H = 1 | NFPA-F = 0 | NFPA-R = 0 | NFPA-S = OX | FlashPt = Non-flammable | LD50 = 4625 mg/kg (rat, oral) |Section8={{Chembox Related | OtherCations = Lithium nitrate Sodium nitrate Potassium nitrate Caesium nitrate | OtherAnions = Rubidium sulfate Rubidium chloride | OtherCompounds =

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

Properties

In a flame test, RbNO3 gives a mauve/light purple colour. ::figure[src="https://upload.wikimedia.org/wikipedia/commons/3/3d/RbNO3_Solubilite_dans_eau.png" caption="Solubility of rubidium nitrate in water]]{{Clear left}}"] ::

Production

RbNO3 can be prepared either by dissolving rubidium metal, its hydroxide or carbonate in nitric acid.

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Uses

Rubidium compounds have very few applications. 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.

References

References

  1. 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
  2. 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.
  3. PubChem. "Rubidium nitrate".

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rubidium-compoundsnitratespyrotechnic-oxidizerspyrotechnic-colorants