General Lanthanum Flint Glass

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Description

Flint glasses are optical glasses with a relatively high refractive index in combination with a low Abbe number and, therfore, a high dispersion.

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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Properties

General

PropertyTemperatureValue

Density

20.0 °C

2.5 - 4.4 g/cm³

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Mechanical

PropertyTemperatureValue

Elastic modulus

20.0 °C

70 - 120 GPa

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Hardness, Knoop, HK2

20.0 °C

410 - 770 [-]

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Poisson's ratio

20.0 °C

0.21 - 0.31 [-]

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Shear modulus

20.0 °C

26 - 47 GPa

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Thermal

PropertyTemperatureValueComment

Coefficient of thermal expansion

300.0 °C

6.3E-6 - 1.13E-5 1/K

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from 100 to 300°C

Glass transition temperature

490 - 670 °C

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Specific heat capacity

20.0 °C

0.45 - 0.8 J/(kg·K)

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Thermal conductivity

20.0 °C

0.2 - 1.2 W/(m·K)

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Optical

PropertyValue

Abbe number

28.69 - 49.62 [-]

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Refractive index

1.57 - 1.8 [-]

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