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Fig. 1

image

Temperature variation of heat conductivity of chondritic matter, normalised by its maximum value. Panel a: data from Yomogida & Matsui (1983) for H (red lines) and L (green lines) chondrites. Panel b: data from Opeil et al. (2012) for H (red lines), L (green lines), and E (blue lines) chondrites (data made kindly available to us by G. Consolmagno). Panel c: normalised heat conductivity calculated from theoretical model for varying contributions of scattering at walls to phonon scattering, from being negligible (the curves with a pronounced peak at low temperatures) to dominating wall scattering (curves with flat maximum).

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