Spectral Properties of Hydrated Poorly Crystalline Materials for Spectral Analysis of the Moon and Mars

[摘要] Visible/near-infrared (VNIR) reflectance spectra of both Mars [1] and the Moon [2] include hydration bands that vary across the planet and are not well explained in some cases. Poorly crystalline phases have been found at ~30-70 wt.% by CheMin in Gale crater, Mars in all samples measured to date [3]. Here we report on VNIR reflectance spectra of a large collection of amorphous and poorly crystalline materials. These include opal, allophane, imogolite, iron hydroxides/ oxyhydroxides (FeOx), and several synthetic materials containing Si, Al and/or Fe. All of these contain hydration bands due to water and OH that can be used to identify these materials remotely on planetary bodies.

[发布日期] 2019-03-18

[学科分类] 天文学(综合)

[关键词] AMORPHOUS MATERIALS;CRYSTALLINITY;HYDRATION;MOON;REFLECTANCE;SPECTRUM ANALYSIS;PLANETS;INFRARED SPECTRA;HYDROXIDES