Lead(II) telluride
Image:Lead(II) telluride.jpg
Other names	Lead telluride
Identifiers
CAS number	[1314-91-6]
Properties
Molecular formula	PbTe
Molar mass	334. CAS registry numbers are unique numerical identifiers for Chemical compounds Polymers biological sequences mixtures and Alloys They are also referred to A chemical formula is a way of expressing information about the Atoms that constitute a particular Chemical compound, and how the relationship between those atoms changes Molar mass, symbol M, is the Mass of one mole of a substance ( Chemical element or Chemical compound) 80 g/mol
Density	8160 kg. The density of a material is defined as its Mass per unit Volume: \rho = \frac{m}{V} Different materials usually have different m-3
Melting point	924 °C
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) Infobox disclaimer and references

Lead telluride is a compound of lead and tellurium (PbTe); it is a narrow gap semiconductor. The melting point of a solid is the temperature range at which it changes state from solid to Liquid. In Chemistry, the standard state of a material is its state at 1 bar (100 Kilopascals exactly Characteristics Lead has a dull luster and is a dense, Ductile, very soft highly Tellurium (tɪˈlʊəriəm/ /tɛl- is a Chemical element that has the symbol Te and Atomic number 52 Narrow gap semiconductors are Semiconducting materials with a Band gap that is comparatively small compared to Silicon. The CAS registry number is 1314-91-6. CAS registry numbers are unique numerical identifiers for Chemical compounds Polymers biological sequences mixtures and Alloys They are also referred to

Contents 1 Properties 2 Applications 3 See also 4 References 5 External links

Properties

• Dielectric constant ~1000. Measurement The relative static permittivity εr can be measured for static Electric fields as follows first the Capacitance of a test
• Electron Effective mass ~ 0. In Solid state physics, a particle's effective mass is the Mass it seems to carry in the semiclassical model of transport in a Crystal. 01m_e
• Energy gap, ΔE_g=0. 25 eV|_T=0 K; 0. 32 eV|_T=300 K
• Electron mobility, μ_n=1600 cm²/(V. In Physics, electron mobility (or simply mobility) is a quantity relating the Drift velocity of Electrons to the applied Electric field s)>|_T=0 K6000 cm²/(V. s)>|_T=300 K
• Hole mobility, μ_p=600 cm²/(V. s)>|_T=0 K4000 cm²/(V. s)>|_T=300 K

Applications

It is often alloyed with tin to make lead tin telluride, which is used as an infrared detector material. An infrared detector is a Photodetector that reacts to Infrared (IR Radiation. It also has good performance as a thermoelectric material, partly due to a low thermal conductivity. The thermoelectric effect is the direct conversion of temperature differences to electric Voltage and vice versa In Physics, thermal conductivity, k is the property of a material that indicates its ability to conduct Heat.

It occurs naturally as the mineral altaite. Altaite also known as Lead telluride is a yellowish white mineral with an isometric crystal structure

See also

• Lead selenide
• Tin telluride

References

External links

• PbTe Material Safety data Sheet
• National Pollutant Inventory Lead and compounds fact sheet
• Webelements

Lead selenide () or lead(II selenide, a Selenide of Lead, is a Semiconductor material. Tin telluride is a compound of tin and Tellurium (SnTe it is a Semi-metal.

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