Reaction of Akaganeite with Mars-Relevant Anions

Pan, M J ; Ming, D W ; Rampe, E B ; Peretyazhko, T S

关键词: IRON OXIDES;    MARS CRATERS;    ANIONS;    HYDROXIDES;    MINERALOGY;    MARS RECONNAISSANCE ORBITER;    CURIOSITY ROVER;   

RP-ID  :  LPI Contrib. No. 2083-2170,JSC-E-DAA-TN53590

学科分类：金属与冶金

美国|英语

来源: NASA Technical Reports Server

【 摘 要 】

Akaganeite has been identified by the Chemistry and Mineralogy (CheMin) and Sample Analysis at Mars (SAM) instruments onboard the Curiosity rover in Yellowknife Bay, Gale Crater, Mars. Akaganeite was also detected by the Compact Reconnaissance Imaging Spectrometer for Mars (CRISM) instrument on the Mars Reconnaissance Orbiter (MRO) in Robert Sharp Crater and Antoniadi basin. Akaganeite is an iron(III) hydroxide with a hollandite-like tunnel structure with tunnels usually occupied by Cl-. Chloride in tunnels is not immobile and can be replaced by other anions in solution. Identification of tunnel composition with Mars-like instruments can help to characterize composition of ancient aqueous environments where akaganeite is present on Mars.