Actions for X-Ray Diffraction Reference Intensity Ratios of Amorphous and Poorly Crystalline Phases : Implications for CheMin on the Mars Science Laboratory

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X-Ray Diffraction Reference Intensity Ratios of Amorphous and Poorly Crystalline Phases : Implications for CheMin on the Mars Science Laboratory

Author
Morris, R. V.
Published
[2013].
Physical Description
1 electronic document
Additional Creators
Rampe, E. B., Chipera, S. J., Ming, D. W., and Achilles, C. N.
Online Version

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Summary
The CheMin instrument on the Mars Science Laboratory (MSL) rover Curiosity is an X-ray diffraction (XRD) and X-ray fluorescence (XRF) instrument capable of providing the mineralogical and chemical compositions of rocks and soils on the surface of Mars. CheMin uses a microfocus X-ray tube with a Co target, transmission geometry, and an energy-discriminating X-ray sensitive CCD to produce simultaneous 2-D XRD patterns and energy-dispersive X-ray histograms from powdered samples. Piezoelectric vibration of the cell is used to randomize the sample to reduce preferred orientation effects. Instrument details are provided in [1, 2, 3]. Analyses of rock and soil samples by the Mars Exploration Rovers (MER) show nanophase ferric oxide (npOx) is a significant component of the Martian global soil [4] and is thought to be one of the major contributing phases that the Curiosity rover will encounter if a soil sample is analyzed in Gale Crater. Because of the nature of this material, npOx will likely contribute to an X-ray amorphous or short-order component of a XRD pattern measured by the CheMin instrument.
Other Subject(s)
Collection
NASA Technical Reports Server (NTRS) Collection.
Note
Document ID: 20130010071.
JSC-CN-27906.
Lunar and Planetary Science Conference; 18-22 Mar. 2013; The Woodlands, TX; United States.
Terms of Use and Reproduction
Copyright, Distribution as joint owner in the copyright.
View MARC record | catkey: 15975676