Magnetic properties of Ni-rich iron meteorites

• Main Authors: Nagata, Takesi, Danon, Jacques A., Funaki, Minoru
• Language: English
• Published: 1987
• Subjects: Yamato; Memoirs of National Institute of Polar Research; Polar Research
• Online Access: https://nipr.repo.nii.ac.jp/record/2139/files/KJ00000012692.pdf; https://nipr.repo.nii.ac.jp/records/2139

P(論文) 6 Ni-rich ataxites (25.6-35.5 wt% in Ni-content) are magnetically analyzed. These Ni-rich ataxites can be classified into 3 groups on the basis of the structure consisting of the major Fe-Ni phases; i. e., (1) ordinary taenite phase (ferromagnetic and paramagnetic γ-phases) only, (Yamato-791694 and the Lime Creek), (2) γ-phase plus tetrataenite (γ'-phase), (the Santa Catharina), and (3) γ-phase plus γ'-phase plus martensitic Fe-Ni metal (α_2-phase), (the Twin City and the San Cristobal). The Tishomingo Ni-rich ataxite has an anomalous structure, which may belong to either group (2) or group (3). Taenite lamellae of 2 octahedrites (the Toluca and the Itutinga) are also magnetically analyzed. These taenite lamellae have the structure of group (2). departmental bulletin paper