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Stability field and phase transition pathways of hydrous ferric sulfates in the temperature range 50 degrees C to 5 degrees C: Implication for martian ferric sulfates
Wang, Alian; Ling, Zongcheng; Freeman, John J.; Kong, Weigang; Wang, AA (reprint author), Washington Univ, Dept Earth & Planetary Sci, McDonnell Ctr Space Sci, 1 Brookings Dr, St Louis, MO 63130 USA.
Department空间科学部
Source PublicationICARUS
2012
Volume218Issue:1Pages:622-643
ISSN0019-1035
Language英语
KeywordMars Mineralogy Mars Spectroscopy Surface Geological Processes
AbstractWe report the results from a systematic laboratory investigation on the fundamental properties of hydrous ferric sulfates. The study involves 150 experiments with duration of over 4 years on the stability field and phase transition pathways under Mars relevant environmental conditions for five ferric sulfates: ferricopiapite [Fe-4.67(SO4)(6)(OH)(2)center dot 20H(2)O], kornelite [Fe-2(SO4)(3)center dot 7H(2)O], a crystalline and an amorphous pentahydrated ferric sulfate [Fe-2(SO4)(3)center dot 5H(2)O], and rhomboclase [FeH(SO4)(2)center dot 4H(2)O]. During the processes of phase transitions, we observed the phenomena that reflect fundamental properties of these species and the occurrence of other common hydrous ferric sulfates, e.g. paracoquimbite [Fe-2(SO4)(3)center dot 9H(2)O]. Based on the results of this set of experiments, we have drown the boundaries of deliquescence zone of five hydrous ferric sulfates and estimated the regions of their stability field in temperature (T) - relative humidity (RH) space. Furthermore, we selected the experimental parameters for a next step investigation, which is to determine the location of the phase boundary between two solid ferric sulfates, kornelite [Fe-2(SO4)(3)center dot 7H(2)O] and pentahydrated ferric sulfate [Fe-2(SO4)(3)center dot 5H(2)O]. The experimental observations in ferricopiapite dehydration processes were used to interpret the observed spectral change of Fe-sulfate-rich subsurface soils on Mars after their exposure by the Spirit rover to current martian atmospheric conditions. (C) 2012 Elsevier Inc. All rights reserved.; We report the results from a systematic laboratory investigation on the fundamental properties of hydrous ferric sulfates. The study involves 150 experiments with duration of over 4 years on the stability field and phase transition pathways under Mars relevant environmental conditions for five ferric sulfates: ferricopiapite [Fe-4.67(SO4)(6)(OH)(2)center dot 20H(2)O], kornelite [Fe-2(SO4)(3)center dot 7H(2)O], a crystalline and an amorphous pentahydrated ferric sulfate [Fe-2(SO4)(3)center dot 5H(2)O], and rhomboclase [FeH(SO4)(2)center dot 4H(2)O]. During the processes of phase transitions, we observed the phenomena that reflect fundamental properties of these species and the occurrence of other common hydrous ferric sulfates, e.g. paracoquimbite [Fe-2(SO4)(3)center dot 9H(2)O]. Based on the results of this set of experiments, we have drown the boundaries of deliquescence zone of five hydrous ferric sulfates and estimated the regions of their stability field in temperature (T) - relative humidity (RH) space. Furthermore, we selected the experimental parameters for a next step investigation, which is to determine the location of the phase boundary between two solid ferric sulfates, kornelite [Fe-2(SO4)(3)center dot 7H(2)O] and pentahydrated ferric sulfate [Fe-2(SO4)(3)center dot 5H(2)O]. The experimental observations in ferricopiapite dehydration processes were used to interpret the observed spectral change of Fe-sulfate-rich subsurface soils on Mars after their exposure by the Spirit rover to current martian atmospheric conditions. (C) 2012 Elsevier Inc. All rights reserved.
Indexed BySCI
Funding Project中国科学院空间科学与应用研究中心
Document Type期刊论文
Identifierhttp://ir.nssc.ac.cn/handle/122/3142
Collection空间科学部
Corresponding AuthorWang, AA (reprint author), Washington Univ, Dept Earth & Planetary Sci, McDonnell Ctr Space Sci, 1 Brookings Dr, St Louis, MO 63130 USA.
Recommended Citation
GB/T 7714
Wang, Alian,Ling, Zongcheng,Freeman, John J.,et al. Stability field and phase transition pathways of hydrous ferric sulfates in the temperature range 50 degrees C to 5 degrees C: Implication for martian ferric sulfates[J]. ICARUS,2012,218(1):622-643.
APA Wang, Alian,Ling, Zongcheng,Freeman, John J.,Kong, Weigang,&Wang, AA .(2012).Stability field and phase transition pathways of hydrous ferric sulfates in the temperature range 50 degrees C to 5 degrees C: Implication for martian ferric sulfates.ICARUS,218(1),622-643.
MLA Wang, Alian,et al."Stability field and phase transition pathways of hydrous ferric sulfates in the temperature range 50 degrees C to 5 degrees C: Implication for martian ferric sulfates".ICARUS 218.1(2012):622-643.
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