Caesium triiodide

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Caesium triiodide
Identifiers
3D model (
JSmol
)
ChemSpider
EC Number
  • 625-701-4
  • InChI=1S/Cs.I3/c;1-3-2/q+1;-1
    Key: PSDVEXXHXQVSQT-UHFFFAOYSA-N
  • I[I-]I.[Cs+]
Properties
CsI3
Molar mass 513.61886 g·mol−1
Appearance purple[1]
Melting point 77 °C (decomposes)[2]
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Caesium triiodide is an inorganic compound, with the chemical formula of CsI3. It can be prepared by slow volatilization and crystallization of caesium iodide and iodine in aqueous ethanol solution.[3] It can form precipitates with diazobenzene.[4]

It undergoes a phase transition from Pnma to P-3c1 under high pressure, and its structure changes from layered to 3D.[5]

References