Caesium oxalate


Caesium oxalate, or dicesium oxalate, or cesium oxalate is a chemical compound with the chemical formula. It is a caesium salt of oxalic acid. It consists of caesium cations and oxalate anions.

Preparation

Caesium oxalate can be prepared by passing carbon monoxide and carbon dioxide over caesium carbonate at 380 °C:
Other alkali carbonates do not undergo transformation to oxalate.
Caesium carbonate can react with oxalic acid in aqueous solution to give caesium oxalate.

Reactions

Caesium oxalate can be reduced back into caesium carbonate and carbon monoxide by thermal decomposition.

Double salts

Compounds that contain caesium and another element in addition to the oxalate anion are double salts of caesium and oxalate. The oxalate may form a complex with a metal that can make a salt with caesium.
Examples include:
nameformulapropertiesreference
caesium bisoxotitanate trihydrate
caesium oxalatooxovanadate
caesium tris ferrate dihydrate
caesium bis cobaltate tetrahydrate
caesium bisnickelate tetrahydrate
caesium trisgermanate
caesium yttrium oxalate monohydratemonoclinic a = 8.979, b = 6.2299, c = 8.103 Å, β = 90.05° V = 453.3 Å3, space group P2/n
caesium bisoxoniobate dihydrate
tetracaesium dilanthanum oxalate octahydrate
tetracaesium dipraseodymium oxalate octahydrate
caesium neodymium oxalate hexahydrate
caesium samarium oxalate hexahydrate
caesium dysprosium oxalate hydrate
caesium gadolinium oxalate sesquihydrate
caesium terbium oxalate sesquihydrate
caesium dysprosium oxalate sesquihydrate
caesium holmium oxalate sesquihydrate
caesium ytterbium oxalate sesquihydrate
caesium lutetium oxalate sesquihydrate
dicaesium dioxotungsten oxalate
dicaesium dioxotungsten difluoride monooxalate
caesium trisrhenate
dicaesium uranyl monooxalate monosulfate dihydrate
ammonium caesium uranyl monooxalate monosulfate dihydrate
caesium dioxoneptunium oxalate hydrate

Mixed anion compounds containing caesium, oxalate and another anion also exist, such as the uranyl sulfate above, and caesium bisborate .