Caesium perchlorate

{{chembox

| Watchedfields = changed

| verifiedrevid = 443114551

| Reference = {{citation | first1 = Dale L. | last1 = Perry | first2 = Sidney L. | last2 = Phillips | title = Handbook of Inorganic Compounds | publisher = CRC Press | year = 1995}}.{{citation | first1 = F. | last1 = Brezina | first2 = J. | last2 = Mollin | first3 = R. | last3 = Pastorek | first4 = Z. | last4 = Sindelar | title = Chemicke tabulky anorganickych sloucenin | publisher = SNTL | year = 1986}}.

| ImageFile = cesium perchlorate.png

| ImageSize = 150px

| ImageFile1 = Cesium perchlorate 25g.jpg

| IUPACName = Caesium perchlorate

| OtherNames = Cesium perchlorate

|Section1={{Chembox Identifiers

| InChI = 1/ClHO4.Cs/c2-1(3,4)5;/h(H,2,3,4,5);/q;+1/p-1

| SMILES = [Cs+].[O-]Cl(=O)(=O)=O

| InChIKey = WKDKOOITVYKILI-REWHXWOFAB

| StdInChI_Ref = {{stdinchicite|correct|chemspider}}

| StdInChI = 1S/ClHO4.Cs/c2-1(3,4)5;/h(H,2,3,4,5);/q;+1/p-1

| StdInChIKey_Ref = {{stdinchicite|correct|chemspider}}

| StdInChIKey = WKDKOOITVYKILI-UHFFFAOYSA-M

| CASNo_Ref = {{cascite|correct|??}}

| CASNo = 13454-84-7

| EINECS = 236-643-0

| ChemSpiderID_Ref = {{chemspidercite|correct|chemspider}}

| ChemSpiderID = 109912

| PubChem = 3035378

}}

|Section2={{Chembox Properties

| Formula = CsClO₄

| MolarMass = 232.36 g/mol

| Appearance = Colorless crystals

| Density = 3.327 g/cm³

| MeltingPtC = 250

| MeltingPt_notes = (decomposes)

| Solubility = 1.974 g/100 ml (25 °C)

| SolubilityProduct = 3.95{{e|−3}}{{cite book |author1=John Rumble |title=CRC Handbook of Chemistry and Physics |date=June 18, 2018 |publisher=CRC Press |isbn=978-1138561632 |pages=5–188|edition=99 |language=English}}

| RefractIndex = 1.4887

}}

|Section3={{Chembox Structure

| CrystalStruct = orthorhombic (<219 °C)
cubic (>219 °C, a = 798 pm)

| SpaceGroup = Pnma (<219 °C)
F43m (>219 °C)

| LattConst_a = 982 pm

| LattConst_b = 600 pm

| LattConst_c = 779 pm (orthorhombic, <219 °C)

| Coordination =

}}

|Section7={{Chembox Hazards

| ExternalSDS = [http://www.espimetals.com/msds's/cesiumperchlorate.pdf External MSDS]

| FlashPt = Non-flammable

}}

|Section8={{Chembox Related

| OtherAnions = Caesium chloride
Caesium chlorate

| OtherCations = Lithium perchlorate
Sodium perchlorate
Potassium perchlorate
Rubidium perchlorate

}}

}}

Caesium perchlorate or cesium perchlorate (CsClO₄), is a perchlorate of caesium. It forms white crystals, which are sparingly soluble in cold water and ethanol. It dissolves more easily in hot water.

CsClO₄ is the second least soluble of the alkali metal perchlorates (after Fr, followed by Rb, K, Li, and Na), a property which may be used for separatory purposes and even for gravimetric analysis.{{Greenwood&Earnshaw1st|page=1017}}. This low solubility played an important role in the characterization of francium as an alkali metal, as francium perchlorate coprecipitates with caesium perchlorate.{{citation | first = E. K. | last = Hyde | title = Radiochemical Methods for the Isolation of Element 87 (Francium) | year = 1952 | journal = J. Am. Chem. Soc. | volume = 74 | issue = 16 | pages = 4181–84 | doi = 10.1021/ja01136a066| hdl = 2027/mdp.39015086483156 | hdl-access = free }}

When heated, CsClO₄ decomposes to caesium chloride above 250 °C. Like all perchlorates, it is a strong oxidant and may react violently with reducing agents and organic materials, especially at elevated temperatures.