1. Stardust Interstellar Preliminary Examination VIII: Identification of crystalline material in two interstellar candidates.
- Author
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Gainsforth, Zack, Brenker, Frank E., Simionovici, Alexandre S., Schmitz, Sylvia, Burghammer, Manfred, Butterworth, Anna L., Cloetens, Peter, Lemelle, Laurence, Tresserras, Juan‐Angel Sans, Schoonjans, Tom, Silversmit, Geert, Solé, Vicente A., Vekemans, Bart, Vincze, Laszlo, Westphal, Andrew J., Allen, Carlton, Anderson, David, Ansari, Asna, Bajt, Saša, and Bastien, Ron K.
- Subjects
INTERPLANETARY dust ,X-ray diffraction ,SYNCHROTRON radiation ,POLYCRYSTALS ,X-ray fluorescence ,NANOCRYSTALS - Abstract
Using synchrotron-based X-ray diffraction measurements, we identified crystalline material in two particles of extraterrestrial origin extracted from the Stardust Interstellar Dust Collector. The first particle, I1047,1,34 (Hylabrook), consisted of a mosaiced olivine grain approximately 1 µm in size with internal strain fields up to 0.3%. The unit cell dimensions were a = 4.85 ± 0.08 Å, b = 10.34 ± 0.16 Å, c = 6.08 ± 0.13 Å (2σ). The second particle, I1043,1,30 (Orion), contained an olivine grain ≈ 2 µm in length and >500 nm in width. It was polycrystalline with both mosaiced domains varying over ≈ 20 [ABSTRACT FROM AUTHOR]
- Published
- 2014
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