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| | Cesium iodide Chemical Properties |
| Melting point | 626 °C (lit.) | | Boiling point | 1280 °C | | density | 4.51 g/mL at 25 °C (lit.) | | refractive index | 1.7876 | | Fp | 1280°C | | storage temp. | Keep in dark place,Inert atmosphere,Room temperature | | form | beads | | Specific Gravity | 4.51 | | color | White | | PH | pH(50g/l, 25℃) : 5.0～9.0 | | Water Solubility | 74 g/100 mL (20 ºC) | | Sensitive | Hygroscopic | | Merck | 14,2014 | | Exposure limits | ACGIH: TWA 0.01 ppm | | Stability: | Stable. Deliquescent. | | CAS DataBase Reference | 7789-17-5(CAS DataBase Reference) | | NIST Chemistry Reference | Cesium iodide(7789-17-5) | | EPA Substance Registry System | Cesium iodide (CsI) (7789-17-5) |
| Hazard Codes | Xn,Xi | | Risk Statements | 36/37/38-42/43-43 | | Safety Statements | 22-36/37-45 | | RIDADR | UN 3077 9 / PGIII | | WGK Germany | 2 | | RTECS | FL0350000 | | F | 8 | | TSCA | Yes | | HS Code | 28276000 | | Toxicity | LD50 i.p. in rats: 1.4 g/kg (Cochran) |
| | Cesium iodide Usage And Synthesis |
| Description | Cesium iodide is a soft material and extremely hygroscopic. Cesium iodide scintillators have been used extensively for indirect x-ray imaging detectors, such as for CT examinations. Cesium iodide is also used to construct electromagnetic shower detector for the CLEO II experiment, which investigates electron-positron annihilation at center-of-mass energies near 10 GeV. Cesium iodide is useful for beam splitters for Far IR spectrophotometers and IR transmission windows.
| | References | [1] W. Zhao, G. Ristic, J. A. Rowlands, X-ray imaging performance of structured cesium iodide scintillators, Medical Physics, 2004, vol. 31, 2594-605
[2] E. Blucher, B. Gittelmann, B. K. Heltsley, J. Kandaswamy, R. Kowalewski, Y.Kubota, N. Mistry and S. Stone, Tests of cesium iodide crystals for an electromagnetic calorimeter, Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 1986, vol. 249, 201-227
[3] M. Völk, O. W. Hamer, S. Feuerbach, M. Strotzer, Dose reduction in skeletal and chest radiography using a large-area flat-panel detector based on amorphous silicon and thallium-doped cesium iodide: technical background, basic image quality parameters, and review of the literature, European Radiology, 2004, vol. 14, 827-834
| | Chemical Properties | white crystalline powder | | Uses | Prisms for infrared spectroscopy; in x-ray fluorescent screens, scintillation counters. | | Uses | Cesium iodide (CsI) is a kind of ionic compound that has been widely used as scintillators in many areas such as X-ray image intensifier tubes, photocathodes, and display devices.
Cesium iodide is used in scintillation counters(Geiger counters) to measure levels of external radiation. It is also useful as a "getter" to remove air molecules remaining in vacuum tubes.
Cesium Iodide is a material with high γ-ray stopping power due to its relative high density and atomic number. For scintillation counting, it is used either in its un-doped form or doped with sodium or thallium.
CsI is resistant to thermal and mechanical shock. The physical characteristics of CsI are independent of the activator used. Compared to NaI(Tl), it is relatively soft and plastic, and does not cleave. Because it has no cleavage plane, it is quite rugged-which makes it well-suited for well logging, space research or other applications where severe shock conditions are encountered. | | Uses | Cesium iodide is used in FT-IR (Fourier Transform Infrared Spectrometers) as a beamsplitter. Cesium Iodide exhibits high gamma-ray stopping power. Useful as input phosphor in fluoroscopy equipment, and efficient photocathode for extreme ultraviolet wavelengths. Fast and dense scintillating material - useful in electromagnetic calorimetry in particle physics. | | General Description | Cesium iodide is a simple ionic salt. It has the capacity to undergo second order transformation from cubic B2 structure to body-centered tetragonal structure at low pressures. It is mostly used as input screens of X-ray image intensifiers. | | Flammability and Explosibility | Nonflammable | | Safety Profile | Moderately toxic by
ingestion and intraperitoneal routes. See also
CESIUM and IODIDES. When heated to
decomposition, it emits toxic fumes of I-. | | Purification Methods | Crystallise it from warm water (1mL/g) by cooling to -5o. |
| | Cesium iodide Preparation Products And Raw materials |
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