Cesium iodide is a colorless crystalline or crystalline powder with the chemical formula CsI. It is easy to deliquescent and sensitive to light. Highly soluble in water, soluble in ethanol, slightly soluble in methanol, almost insoluble in acetone. The relative density is 4.5 g/cm³. Melting Point: 621°c. The boiling point is about 1280 °C.

Applications of Cesium Iodide

1. Scintillation counter: Cesium iodide is a commonly used scintillator material for γ-ray and X-ray detection. When these rays pass through the cesium iodide crystal, they excite the atoms in the crystal, producing visible photons. These photons can be detected by photomultiplier tubes and converted into electrical signals for use in nuclear physics experiments, medical imaging, security inspections, and other fields.

2. Medical Imaging: In positron emission tomography (PET) and single-photon emission computed tomography (SPECT), cesium iodide is used in detectors to help form images of the body's internal structures.

3. Optics: Cesium iodide is used as a window material for some optics due to its high transparency and good optical uniformity, such as in laser devices.

4. Radiation detectors: Cesium iodide is also used in the manufacture of high-energy radiation detectors, which are used in particle physics research to detect and measure the energy of particles.

5. Other industrial applications: Cesium iodide is also used as a catalyst for certain chemical reactions, or as an additive in the production of special glass and optical fibers.