Germanium Optical Grade - Monocrystalline

GERMANIUM (GE)

MATERIAL:	Germanium – Optical Grade - Monocrystalline
SPECTRAL DATA:	Transmission ≥ 46% @ 3-10 microns Polished 10mm thick sample

Typical transmission curve of 1mm thick Germanium (mono-crystalline)

Physical electronic properties:

Atomic No	32
Atomic weight	72.6
Crystal structure	Diamond cubic
Grating Parameter, A	5.657
Density (298oK), g/cm³	5.323
Atomic Density, atoms/cmsup>3	4.42*1022
Melting Temperature °C	937
Boiling Temperature °C	2830
Specific Thermal Capacity (0-100°C), kal/g*degree	0.074
Latent Heat of Fusion, kal/mol	8100
Coefficient of Linear Thermal Expansion (2930K), cm/degree	6.1*10^-6
Mohs Hardness	6
Band Gap, direct (300oK), e. V.	0.67
Intrinsic Carriers Concentration (300 oK), cm-6	p,n=5.51026
Intrinsic Drift Mobility (300oK), cm2/v.s.:electronesholes	38001820
Diffusion Coefficient (300oK), cm2/sec:electronesholes	10149
Intrinsic Resistivity (300oK),Ohm*cm	47

Optical Properties

Refraction coefficient at 20 oC and λ=10 μm, "n".	n=4.0032 +/- 0.0002
Homogeneity of refractive coefficient, Δn	<= 2 * 10^-4
Temperature coefficient at 20-25 oC, dn/dT, C^-1	<= 4 * 10^-4
Absorption coefficient (extinction indicator) at λ=10.6 μm, αλ .	αλnot more than 0.03 cm

WHILE EVERY ATTEMPT HAS BEEN MADE TO VERIFY THE SOURCE OF THE INFORMATION, NO RESPONSIBILITY IS ACCEPTED FOR ACCURACY OF DATA.