Four-dimensional-STEM analysis of the phyllosilicate-rich matrix of Ryugu samples [* Cross-Reference *]

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Mouloud, Bahae eddine; Jacob, Damien; de la Peña, Francisco; Marinova, Maya; Le Guillou, Corentin; Viennet, Jean Christophe; Laforet, Sylvain; Leroux, Hugues; Teurtrie, Adrien; Noguchi, Takaaki; Matsumoto, Toru; Miyake, Akira; Igami, Yohei; Haruta, Mitsutaka; Saito, Hikaru; Hata, Satoshi; Seto, Yusuke; Miyahara, Masaaki; Tomioka, Naotaka; Ishii, Hope A.; Bradley, John P.; Ohtaki, Kenta K.; Dobrica, Elena; Langenhorst, Falko; Harries, Dennis; Beck, Pierre; Phan, Thi H.V.; Rebois, Rolando; Abreu, Neyda M.; Gray, Jennifer; Zega, Thomas; Zanetta, Pierre M.; Thompson, Michelle S.; Stroud, Rhonda; Burgess, Kate; Cymes, Brittany A.; Bridges, John C.; Hicks, Leon; Lee, Martin R.; Daly, Luke; Bland, Phil A.; Zolensky, Michael E.; Frank, David R.; Martinez, James; Tsuchiyama, Akira; Yasutake, Masahiro; Matsuno, Junya; Okumura, Shota; Mitsukawa, Itaru; Uesugi, Kentaro; Uesugi, Masayuki; Takeuchi, Akihisa; Sun, Mingqi; Enju, Satomi; Takigawa, Aki; Michikami, Tatsuhiro; Nakamura, Tomoki; Matsumoto, Megumi; Nakauchi, Yusuke; Abe, Masanao; Nakazawa, Satoru; Okada, Tatsuaki; Saiki, Takanao; Tanaka, Satoshi; Terui, Fuyuto; Yoshikawa, Makoto; Miyazaki, Akiko; Nakato, Aiko; Nishimura, Masahiro; Usui, Tomohiro; Yada, Toru; Yurimoto, Hisayoshi; Nagashima, Kazuhide; Kawasaki, Noriyuki; Sakamotoa, Naoya; Okazaki, Ryuji; Yabuta, Hikaru; Naraoka, Hiroshi; Sakamoto, Kanako; Tachibana, Shogo; Watanabe, Sei ichiro; Tsuda, Yuichi, 2024, "Four-dimensional-STEM analysis of the phyllosilicate-rich matrix of Ryugu samples [* Cross-Reference *]", https://lore.list.lu/citation?persistentId=perma:LIST.QH5ICI, LIST Open Repository, V1
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Description
Ryugu asteroid grains brought back to the Earth by the Hayabusa2 space mission are pristine samples containing hydrated minerals and organic compounds. Here, we investigate the mineralogy of their phyllosilicate-rich matrix with four-dimensional scanning transmission electron microscopy (4D-STEM). We have identified and mapped the mineral phases at the nanometer scale (serpentine, smectite, pyrrhotite), observed the presence of Ni-bearing pyrrhotite, and identified the serpentine polymorph as lizardite, in agreement with the reported aqueous alteration history of Ryugu. Furthermore, we have mapped the d-spacings of smectite and observed a broad distribution of values, ranging from 1 to 2 nm, with an average d-spacing of 1.24 nm, indicating significant heterogeneity within the sample. Such d-spacing variability could be the result of either the presence of organic matter trapped in the interlayers or the influence of various geochemical conditions at the submicrometer scale, suggestive of a range of organic compounds and/or changes in smectite crystal chemistry. (2024-02-06)
***This entry has been automatically imported via Infodoc(ASO) CSV by LIST harvest scripts. Please refer to https://doi.org/10.1111/maps.14124 for the original and latest version of the dataset and data downloads*** (2025-09-03)
Subject Earth and Environmental Sciences
Keyword asteroid grains brought, grains brought back, Ryugu asteroid grains, space mission, asteroid grains
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