Cadmium Selenide (CdSe)


Application fields: IR optics, polarizers, beamsplitters, l/4 and l/2 waveplates; substrates; sources for vacuum deposition
CAS # 1306-24-7
Growth methods: HPVB or HPVZM
Structure Wurtzite (Hexagonal)
Density:  5.81 g/cm3
Young’s Modulus: 5´1011dyne/cm2
Coef. of Thermal Expansion (500 K): a 1=6.26´10-6/K;a 3=4.28´10-6/K
Specific Heat: 0.49 J/gK
Thermal conductivity (at 25 oC): 0.04 W/cmK
Max. Transmittance (l=2.5-15 mm): ³ 71 %
Absorption Coef. (l=10.6 mm): £ 0.0015 cm-1(including 2 surfaces)
Refractive index (l=10.6 mm): 2.4
Max. single crystal diameter/length: Æ 38´30mm
Max. IR optic blank diameter/length: Æ 40´50mm or plate 60´60´6mm

Transmittance spectra:

CdSe plate "as grown" (right) and window for IR application(left):
Possible orientations of the single crystal tape:

CdSe single crystal:

Content of impurities in CdSe crystals

Material Safety Data Sheet