Cadmium Tungstate (Cadmium Tungsten Oxide) (CdWO4)-Granules

(Cadmium Tungstate (Cadmium Tungsten Oxide) (CdWO4)-Granules)

CAS: 7790-85-4 Molecular Formula: CdWO4 Purity: 99.95% Products Code: TR Specification Model: 1 mm – 4 mm Hazardous Class: Class 6.1 EINECS No.: 232-226-2 UN No.: UN2570 Package Class: PG III

Characteristic

Cadmium tungstate (CdWO4 or CWO), the cadmium salt of tungstic acid, is a dense, chemically inert solid which is used as a scintillation crystal to detect gamma rays. It has density of 7.9 g/cm3 and melting point of 1325 °C.

Chemical formula：CdWO4

Molar mass： 360.25 g·mol−1

Appearance：colorless crystals with a yellow tint

Density：7.9 g/cm3, solid

Melting point：1,325 °C (2,417 °F; 1,598 K)

Solubility in water：0.04642 g/100 mL (20 °C)

Application

It is often used in computed tomography. Combining the scintillator crystal with externally applied piece of boron carbide allows construction of compact detectors of gamma rays and neutron radiation.

Cadmium tungstate was used as a replacement of calcium tungstate in some fluoroscopes since the 1940s. Very high radiopurity allows use of this scintillator as a detector of rare nuclear processes (double beta decay, other rare alpha and beta decays) in low-background applications.

(Cadmium Tungstate (Cadmium Tungsten Oxide) (CdWO4)-Granules)