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Thallium is a poisonous, bluish-grey metal that tarnishes quickly in air. Today, thallium doesn't have too many applications due to its toxicity. The metal itself has no commercial value, and very few of its compounds do. Among these, thallium sulphide and oxysulphide are used to manufacture high quality photovoltaic cells, the latter of which has the particularity of being very sensitive to infrared light.

This material data has been provided by Matmatch.

All metrics apply to room temperature unless otherwise stated. SI units used unless otherwise stated.
Equivalent standards are similar to one or more standards provided by the supplier. Some equivalent standards may be stricter whereas others may be outside the bounds of the original standard.

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20.0 °C

11.85 g/cm³

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Elastic modulus

20.0 °C

8 GPa

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Hardness, Brinell

20.0 °C

26.4 [-]

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Poisson's ratio

20.0 °C

0.45 [-]

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Tensile strength

20.0 °C

9 MPa

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Melting point

304 °C

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Specific heat capacity

20.0 °C

129 J/(kg·K)

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Thermal conductivity

20.0 °C

46 W/(m·K)

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Electrical resistivity

20.0 °C

1.5E-7 Ω·m

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