Abstract
The electrical conductivity of three natural orthopyroxene single crystals has been measured up to l,300°C and is shown to be dependent on oxygen fugacity. The presence of cleavage cracks and exsolution lamellae also has a large influence on the electrical conductivity. Temperatures calculated for the lunar interior from electrical conductivity data on pyroxenes under controlled oxygen fugacity are up to 700°C higher than previous calculations based on conductivity data for olivine.
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