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COMSOL CD

Bismuth Telluride, Bi2Te3 (Tellurobismuthite)

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Subcategory: Ceramic; Semiconductor; Sulfide/Chalcogenide

Key Words: Chalcogenide; Semiconductor; Tellurium

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Physical PropertiesMetricEnglishComments
Density7.73 g/cc0.279 lb/in³ 
a Lattice Constant4.38 Å4.38 Å 
c Lattice Constant30.45 Å30.45 Å 
Formula Units/Cell (Z)33 
Molecular Weight800.76 g/mol800.76 g/mol 

Mechanical Properties
Knoop Microhardness155155 N/mm²
Hardness, Mohs1.81.8 

Electrical Properties
Band Gap0.21 eV0.21 eV 
Electron Mobility, cm²/V-s11401140 
Hole Mobility, cm²/V-s680680 

Thermal Properties
Specific Heat Capacity0.016 J/g-°C0.00382 BTU/lb-°F 
Thermal Conductivity3 W/m-K20.8 BTU-in/hr-ft²-°F 
Melting Point585 °C1090 °F 

Descriptive Properties
CAS Number1304-82-1 
ColorGray 
Crystal StructureHexagonal-Rhombohedral Tetradymite Structure - R(-3)M
SolubilityInsoluble in H2O; Soluble in EtOH 
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