Mateck Gallium Arsenide (GaAs)

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Mateck Gallium Arsenide (GaAs)
Categories:	Ceramic; Phosphide/Pnictide; Other Engineering Material; Semiconductor
Material Notes:	Optical crystals
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Physical Properties	Metric	English	Comments

Density	5.316 g/cc @Temperature 20.0 °C	0.1921 lb/in³ @Temperature 68.0 °F
Solubility	0.00 ppm	0.00 ppm
a Lattice Constant	5.653 Å	5.653 Å
Molecular Weight	144.64 g/mol	144.64 g/mol

Mechanical Properties	Metric	English	Comments
Vickers Microhardness	6900	6900	MPa
Hardness, Mohs	4.5	4.5
Modulus of Elasticity	85.0 GPa	12300 ksi
Poissons Ratio	0.31	0.31
Shear Modulus	32.4 GPa	4700 ksi	Calculated

Thermal Properties	Metric	English	Comments
CTE, linear	5.39 µm/m-°C @Temperature 0.000 - 30.0 °C	2.99 µin/in-°F @Temperature 32.0 - 86.0 °F
Specific Heat Capacity	0.350 J/g-°C	0.0837 BTU/lb-°F
Thermal Conductivity	46.05 W/m-K @Temperature 25.0 °C	319.6 BTU-in/hr-ft²-°F @Temperature 77.0 °F
Melting Point	1238 °C	2260 °F

Optical Properties	Metric	English	Comments
Refractive Index	3.34	3.34	n8.0
	2.41 @Wavelength 19000 nm	2.41 @Wavelength 19000 nm
	2.82 @Wavelength 14500 nm	2.82 @Wavelength 14500 nm
	3.34 @Wavelength 8000 nm	3.34 @Wavelength 8000 nm
IR Transmittance	1.0 % @Wavelength 900 nm	1.0 % @Wavelength 900 nm	Internal Transmittance
	2.0 % @Wavelength 15000 nm	2.0 % @Wavelength 15000 nm	Internal Transmittance
	55 % @Wavelength 1500 nm	55 % @Wavelength 1500 nm	Internal Transmittance
	60 % @Wavelength 10000 nm	60 % @Wavelength 10000 nm	Internal Transmittance

Descriptive Properties
Absorption loss (cm^-1)	0.26		at 8.0 microns
Symmetry	cubic
Symmetry Class	43m F43m
Transmission Range (microns)	1 - 15

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CMAT042 / 87726

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