{{Short description|Chemical compound RbNO<sub>3</sub>}} {{Chembox | 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 = {{chemspidercite|correct|chemspider}} | ChemSpiderID = 23971 | InChI = 1S/NO3.Rb/c2-1(3)4;/q-1;+1 | InChIKey = RTHYXYOJKHGZJT-UHFFFAOYAE | SMILES = [Rb+].[O-][N+]([O-])=O | StdInChI_Ref = {{stdinchicite|correct|chemspider}} | StdInChI = 1S/NO3.Rb/c2-1(3)4;/q-1;+1 | StdInChIKey_Ref = {{stdinchicite|correct|chemspider}} | StdInChIKey = RTHYXYOJKHGZJT-UHFFFAOYSA-N | InChIKey1 = RTHYXYOJKHGZJT-UHFFFAOYSA-N | CASNo = 13126-12-0 | CASNo_Ref = {{cascite|correct|CAS}} | EINECS = 236-060-1 | PubChem = 25731 | RTECS = QV0900000 }} |Section2={{Chembox Properties | Formula = RbNO<sub>3</sub> | MolarMass = 147.473 g/mol | Appearance = White hygroscopic solid | Density = 3.11 g/cm<sup>3</sup> | MeltingPtC = 310 | MeltingPt_notes = decomposes | BoilingPtC = 578 | BoilingPt_notes = | Solubility = 44.28 g/100 mL (16&nbsp;°C)<br>65.0 g/100 mL (25&nbsp;°C)<ref name=Ullmann>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}}</ref> | Solubility1 = very slightly soluble | Solvent1 = acetone | RefractIndex = 1.524 | MagSus = &minus;41.0·10<sup>−6</sup> cm<sup>3</sup>/mol }} | Section3 = {{Chembox Structure | Structure_ref = <ref>{{Cite journal|title=Phase Transition in Rubidium Nitrate at 346&nbsp;K and Structure at 296, 372, 413 and 437&nbsp;K|author=Jutta Pohl, Dieter Pohl, Gunadi Adiwidjaja|journal=Acta Crystallographica Section B|volume=B48|date=1992|issue=2 |pages=160–166|doi=10.1107/S0108768191013459|doi-access=free}}</ref> | CrystalStruct = trigonal | SpaceGroup = P3<sub>1</sub> | 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 Å<sup>3</sup> | UnitCellFormulas = | Coordination = | MolShape = | OrbitalHybridisation = | Dipole = }} |Section7={{Chembox Hazards | ExternalSDS = | GHS_ref = <ref>{{Cite web |last=PubChem |title=Rubidium nitrate |url=https://pubchem.ncbi.nlm.nih.gov/compound/25731 |access-date=2026-01-19 |website=pubchem.ncbi.nlm.nih.gov |language=en}}</ref> | GHSPictograms = {{GHS03}}{{GHS07}} | GHSSignalWord = Danger | HPhrases = {{H-phrases|H272|H315|H319|H335}} | PPhrases = {{P-phrases|P210|P220|P261|P264|P264+P265|P271|P280|P302+P352|P304+P340|P305+P351+P338|P319|P321|P332+P317|P337+P317|P362+P364|P370+P378|P403+P233|P405|P501}} | 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<br/>Sodium nitrate<br/>Potassium nitrate<br/>Caesium nitrate | OtherAnions = Rubidium sulfate<br/>Rubidium chloride | OtherCompounds = }} }}

'''Rubidium nitrate''' is an inorganic compound with the formula RbNO<sub>3</sub>. This alkali metal nitrate salt is a white hygroscopic solid that is highly soluble in water.

==Properties== In a flame test, RbNO<sub>3</sub> gives a mauve/light purple colour. left|thumb|Solubility of rubidium nitrate in water{{Clear left}}

==Production== RbNO<sub>3</sub> can be prepared either by dissolving rubidium metal, its hydroxide or carbonate in nitric acid.

:{{chem2 | RbOH + HNO3 -> RbNO3 + H2O }} :{{chem2 | Rb2CO3 + 2 HNO3 -> 2 RbNO3 + CO2 + H2O }} :{{chem2 | 2 Rb + 2 HNO3 -> 2 RbNO3 + H2 }}

==Uses== Rubidium compounds have very few applications.<ref name=Ullmann/> 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/>

{{Rubidium compounds}} {{nitrates}}

{{DEFAULTSORT:Rubidium Nitrate}} Category:Rubidium compounds Category:Nitrates Category:Pyrotechnic oxidizers Category:Pyrotechnic colorants