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Influence of structural relaxation on the low-temperature thermal conductivity of ancient natural glasses (1991)

Love, M. S. ; Anderson, A. C.

Springer

Journal of low temperature physics 84 (1991), S. 19-36

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ISSN: 1573-7357

Source: Springer Online Journal Archives 1860-2000

Topics: Physics

Notes: Abstract The thermal conductivities κ of two natural glasses, amber and obsidian, were measured over the temperature range 0.06–10 K both in the as-received condition and following heat-treatments near and above the glass-transition temperature. The κ of amber decreased 6% with heat treatment revealing that this glass had undergone configurational relaxation during the 107 years prior to measurement, but with a relaxation time greater than seven years. The κ of the obsidian did not change with heat treatment, a null result possibly produced by the ratio of oxides comprising the glass.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF00681615

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