Typical values of thermal conductivity

Typical values of thermal conductivity

Table
Typical values of thermal conductivity
(in 0.001 calories per centimetre per second per degree Celsius)
material at 20 °C at 200 °C
typical rocks   4–10
granite   7.8 6.6
gneiss
(perpendicular to banding)   5.9 5.5 (100 °C)
(parallel to banding)   8.2 7.4 (100 °C)
gabbro   5.1 5.0
basalt   4.0 4.0
dunite 12.0 8.1
marble   7.3 5.2
quartzite 15.0 9.0
limestone   6.0
one sandstone
(dry)   4.4
(saturated)   5.4
shale   3–4
rock salt 12.8
sand
(dry)   0.65
(30% water)   3.94
water   1.34 (0 °C) 1.6 (80 °C)
ice   5.3 (0 °C) 9.6 (−130 °C)
magnetite 12.6
quartz 20.0
feldspars   5.0
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Universalium. 2010.

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