Cadmium Tungstate (CdWO<sub>4</sub>) Single Crystals and Substrates - MSE Supplies LLC

Cadmium Tungstate (CdWO4) Single Crystals and Substrates

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Cadmium Tungstate (CdWO4) Single Crystal is a yellow to colorless (depends on the the annealing) crystal. It is a high density, low afterglow, high resistance to radiation damage and high Z scintillator with high light yield. The peak scintillation wavelength of CdWO4 crystal is around 480nm. Because of these superior properties, CdWO4 single crystal is widely used for radiation detector, high energy physics, container inspection, and other applications.

Main Parameters of Cadmium Tungstate Single Crystal Substrates





Crystal structure


Lattice constant

a = 5.029 Å, b = 5.859 Å, c = 5.074 Å

α = γ = 90°, β = 91.47°

Melt point 

1325 ºC


7.9 g/cm3

Thermal expansion

1.09 x 10-5 K-1 (010); 6.39 x 10-6 K-1 (100)

Refractive index (room temperature) 2.3 @ 633 nm


10 mm x 10 mm x 0.5 mm

15 mm x 15 mm x 0.5 mm                

other sizes are available upon request

Surface polishing

Single side polished is standard, Double side polished upon request

Crystal orientations

 (010), (001)

Surface roughness, Ra

≤ 5 Å


Sealed in class 100 clean bags packed in class 1000 clean room



1) Michail, Christos, Vaia Koukou, Niki Martini, George Saatsakis, Nektarios Kalyvas, Athanasios Bakas, Ioannis Kandarakis, George Fountos, George Panayiotakis, and Ioannis Valais. Luminescence efficiency of cadmium tungstate (CdWO4) single crystal for medical imaging applications. Crystals 10, no. 6 (2020): 429.

2) Nagornaya, L., G. Onyshchenko, E. Pirogov, N. Starzhinskiy, I. Tupitsyna, V. Ryzhikov, Yu Galich, Yu Vostretsov, S. Galkin, and E. Voronkin. Production of the high-quality CdWO4 single crystals for application in CT and radiometric monitoring. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 537, no. 1-2 (2005): 163-167.