Lead telluride
Lead telluride is a compound of lead and tellurium (PbTe). It crystallizes in the NaCl crystal structure with Pb atoms occupying the cation and Te forming the anionic lattice. It is a narrow gap semiconductor with a band gap of 0.32 eV. It occurs naturally as the mineral altaite.
| Names | |
|---|---|
| Other names
Lead(II) telluride Altaite | |
| Identifiers | |
| ChemSpider | |
| ECHA InfoCard | 100.013.862 |
| EC Number |
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PubChem CID |
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| UNII | |
CompTox Dashboard (EPA) |
|
| Properties | |
| 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) |
| 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 | |
| Halite (cubic), cF8 | |
Space group |
Fm3m, No. 225 |
a = 6.46 Angstroms | |
| Octahedral (Pb2+) Octahedral (Te2−) | |
| Thermochemistry | |
Std molar entropy (S⦵298) |
50.5 J·mol−1·K−1 |
Std enthalpy of formation (ΔfH⦵298) |
-70.7 kJ·mol−1 |
Std enthalpy of combustion (ΔcH⦵298) |
110.0 J·mol−1·K−1 |
| Hazards | |
| GHS labelling: | |
| Danger | |
| H302, H332, H351, H360, H373, H410 | |
| P201, P202, P260, P261, P264, P270, P271, P273, P281, P301+P312, P304+P312, P304+P340, P308+P313, P312, P314, P330, P391, P405, P501 | |
| Flash point | Non-flammable |
| Safety data sheet (SDS) | External MSDS |
| Related compounds | |
Other anions |
Lead(II) oxide Lead(II) sulfide Lead selenide |
Other cations |
Carbon monotelluride Silicon monotelluride Germanium telluride Tin telluride |
Related compounds |
Thallium telluride Bismuth telluride |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references | |
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