Title

Scientific Progress On Research In Anthropology And Health

Abstract

In our ongoing survey of meteorite physical properties, we have to date measured the thermal conductivity for seventeen stony meteorites at temperatures ranging from 5K to 300K. Here, we report new results for nine ordinary chondrites, one enstatite chondrite, and the basaltic achondrites Frankfort (howardite) and Los Angeles (shergottite). We find that thermal conductivity is significantly lower than would be expected from averaging the laboratory conductivities of their constituent minerals, with a dependence on temperature different from the expected conductivity of pure minerals. In addition, we find a linear relationship between the inverse of the porosity of the samples measured and their thermal conductivity, regardless of meteorite composition or type. We conclude that thermal conductivity is controlled by the presence of shock-induced microcracks within the meteorites, which provide a barrier to the transmission of thermal energy via phonons. In contrast to conductivity, our first measurement of heat capacity as a function of temperature (on Los Angeles) suggests that heat capacity is primarily a function of oxide composition and is not strongly affected by the physical state of the sample. © 2012 The Meteoritical Society.

Publication Date

3-1-2012

Publication Title

Collegium Antropologicum

Volume

36

Issue

3

Number of Pages

1-3

Document Type

Editorial Material

Personal Identifier

scopus

Socpus ID

84859471215 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/84859471215

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