Lead telluride

Lead telluride^[1]^[2]^[3]
Names
	Other names Lead(II) telluride; Altaite
Identifiers
CAS Number	1314-91-6 ;
ECHA InfoCard	100.013.862
PubChem CID	4389803;
CompTox Dashboard (EPA)	DTXSID5061663 ;
Properties
Chemical formula	PbTe
Molar mass	334.80 g/mol
Appearance	gray cubic crystals.
Density	8.164 g/cm3
Melting point	924 °C (1,695 °F; 1,197 K)
Solubility in water	insoluble
Band gap	0.25 eV (0 K); 0.32 eV (300 K)
Electron mobility	1600 cm2 V−1 s−1 (0 K); 6000 cm2 V−1 s−1 (300 K)
Structure
Crystal structure	Halite (cubic), cF8
Space group	Fm3m, No. 225
Lattice constant	a = 6.46 Angstroms ; ;
Coordination geometry	Octahedral (Pb2+); Octahedral (Te2−)
Thermochemistry
Std enthalpy of; formation ΔfHo298	-70.7 kJ·mol−1
Std enthalpy of; combustion ΔcHo298	110.0 J·mol−1·K−1
Standard molar; entropy So298	50.5 J·mol−1·K−1
Hazards
EU classification	Repr. Cat. 1/3; Harmful (Xn); Dangerous for the environment (N)
R-phrases	R61, R20/22, R33, R62, R50/53
S-phrases	S53, S45, S60, S61
Flash point	Non-flammable
Related compounds
Other anions	{{{value}}}
Other cations	{{{value}}}
Related compounds	{{{value}}}
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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	Infobox references

Lead telluride, also known as lead(II) telluride, is a chemical compound. Its chemical formula is PbTe. It contains lead and telluride ions. The lead is in the +2 oxidation state.

Properties

Lead telluride is a gray crystalline solid. It reacts with strong acids to make toxic hydrogen telluride and toxic lead salts.

It may be made by melting lead and tellurium together.

It is used as a semiconductor and an infrared detector.

↑ Lide, David R. (1998), Handbook of Chemistry and Physics (87 ed.), Boca Raton, Florida: CRC Press, pp. 4–65, ISBN 978-0-8493-0594-8
↑ CRC Handbook, pp. 5–24.
↑ Lawson, William D (1951). "A method of growing single crystals of lead telluride and selenide". J. Appl. Phys. 22 (12): 1444–1447. doi:10.1063/1.1699890.

Names
Other names Lead(II) telluride Altaite
Identifiers
CAS Number	1314-91-6^Y
ECHA InfoCard	100.013.862
PubChem CID	4389803
CompTox Dashboard (EPA)	DTXSID5061663
Properties
Chemical formula	PbTe
Molar mass	334.80 g/mol
Appearance	gray cubic crystals.
Density	8.164 g/cm³
Melting point	924 °C (1,695 °F; 1,197 K)
Solubility in water	insoluble
Band gap	0.25 eV (0 K) 0.32 eV (300 K)
Electron mobility	1600 cm² V⁻¹ s⁻¹ (0 K) 6000 cm² V⁻¹ s⁻¹ (300 K)
Structure
Crystal structure	Halite (cubic), cF8
Space group	Fm3m, No. 225
Lattice constant	a = 6.46 Angstroms
Coordination geometry	Octahedral (Pb²⁺) Octahedral (Te²⁻)
Thermochemistry
Std enthalpy of formation Δ_fH^o₂₉₈	-70.7 kJ·mol⁻¹
Std enthalpy of combustion Δ_cH^o₂₉₈	110.0 J·mol⁻¹·K⁻¹
Standard molar entropy S^o₂₉₈	50.5 J·mol⁻¹·K⁻¹
Hazards
EU classification	Repr. Cat. 1/3 Harmful (Xn) Dangerous for the environment (N)
R-phrases	R61, R20/22, R33, R62, R50/53
S-phrases	S53, S45, S60, S61
Flash point	Non-flammable
Related compounds
Other anions	{{{value}}}
Other cations	{{{value}}}
Related compounds	{{{value}}}
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
N verify (what is ^YN ?)
Infobox references