Biele Jens, Grott Matthias, Zolensky Michael E, Benisek Artur, Dachs Edgar
RB-MUSC, DLR - German Aerospace Center, 51147 Cologne, Germany.
Institute for Planetary Research, DLR - German Aerospace Center, Berlin, Germany.
Int J Thermophys. 2022;43(9):144. doi: 10.1007/s10765-022-03046-5. Epub 2022 Aug 1.
We provide detailed background, theoretical and practical, on the specific heat of minerals and mixtures thereof, 'astro-materials,' as well as background information on common minerals and other relevant solid substances found on the surfaces of solar system bodies. Furthermore, we demonstrate how to use specific heat and composition data for lunar samples and meteorites as well as a new database of endmember mineral heat capacities (the result of an extensive literature review) to construct reference models for the isobaric specific heat as a function of temperature for common solar system materials. Using a (generally linear) mixing model for the specific heat of minerals allows extrapolation of the available data to very low and very high temperatures, such that models cover the temperature range between 10 K and 1000 K at least (and pressures from zero up to several kbars). We describe a procedure to estimate () for virtually any solid solar system material with a known mineral composition, e.g., model specific heat as a function of temperature for a number of typical meteorite classes with known mineralogical compositions. We present, as examples, the () curves of a number of well-described laboratory regolith analogs, as well as for planetary ices and 'tholins' in the outer solar system. Part II will review and present the heat capacity database for minerals and compounds and part III is going to cover applications, standard reference compositions, () curves, and a comparison with new and literature experimental data.
The online version contains supplementary material available at 10.1007/s10765-022-03046-5.
我们提供了关于矿物及其混合物(“天体材料”)比热的详细背景知识,包括理论和实践方面的,以及关于太阳系天体表面常见矿物和其他相关固体物质的背景信息。此外,我们展示了如何利用月球样本和陨石的比热及成分数据,以及一个新的端元矿物热容量数据库(广泛文献综述的结果)来构建常见太阳系物质等压比热随温度变化的参考模型。使用矿物比热的(通常为线性的)混合模型可以将现有数据外推到非常低和非常高的温度,使得模型至少覆盖10 K到1000 K的温度范围(以及从零到几千巴的压力)。我们描述了一种程序,用于估计几乎任何已知矿物成分的固体太阳系物质的(),例如,为一些具有已知矿物成分的典型陨石类别建立比热随温度变化的模型。作为示例,我们给出了一些描述详细的实验室风化层模拟物以及外太阳系行星冰和“tholins”的()曲线。第二部分将回顾并展示矿物和化合物的热容量数据库,第三部分将涵盖应用、标准参考成分、()曲线以及与新的和文献中的实验数据的比较。
在线版本包含可在10.1007/s10765-022-03046-5获取的补充材料。