Indium antimonide
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Indium antimonide (InSb) is a crystalline compound made from the elements indium (In) and antimony (Sb). It is a narrow-gap semiconductor material from the III-V group used in infrared detectors, including thermal imaging cameras, FLIR systems, infrared homing missile guidance systems, and in infrared astronomy. Indium antimonide detectors are sensitive to infrared wavelengths between 1 and 5 μm.
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Quick Facts Identifiers, Properties ...
Identifiers | |
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3D model (JSmol) |
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ChemSpider |
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ECHA InfoCard | 100.013.812 |
EC Number |
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PubChem CID |
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RTECS number |
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UNII | |
UN number | 1549 |
CompTox Dashboard (EPA) |
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Properties | |
InSb | |
Molar mass | 236.578 g·mol−1 |
Appearance | Dark grey, metallic crystals |
Density | 5.7747 g⋅cm−3[1] |
Melting point | 524 °C (975 °F; 797 K)[1] |
Band gap | 0.17 eV |
Electron mobility | 7.7 mC⋅s⋅g−1 (at 27 °C) |
Thermal conductivity | 180 mW⋅K−1⋅cm−1 (at 27 °C) |
Refractive index (nD) |
4[2] |
Structure | |
Zincblende | |
T2d-F-43m | |
a = 0.648 nm | |
Tetrahedral | |
Thermochemistry[3] | |
Heat capacity (C) |
49.5 J·K−1·mol−1 |
Std molar entropy (S⦵298) |
86.2 J·K−1·mol−1 |
Std enthalpy of formation (ΔfH⦵298) |
−30.5 kJ·mol−1 |
Gibbs free energy (ΔfG⦵) |
−25.5 kJ·mol−1 |
Hazards | |
GHS labelling: | |
[4] | |
Warning | |
H302, H332, H411 | |
P273 | |
Safety data sheet (SDS) | External SDS |
Related compounds | |
Other anions |
Indium nitride Indium phosphide Indium arsenide |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Close
Indium antimonide was a very common detector in the old, single-detector mechanically scanned thermal imaging systems. Another application is as a terahertz radiation source as it is a strong photo-Dember emitter.