@article{oai:nipr.repo.nii.ac.jp:00001102,
 author = {Nagata, Takesi},
 journal = {Memoirs of National Institute of Polar Research. Special issue},
 month = {Dec},
 note = {P(論文), The magnetic hysteresis curves and the thermomagnetic curves of 17 Antarctic achondrites are measured. The saturation magnetization (I_s) of 3 ureilites ranges 2.2-6.4emu/gm while I_s is smaller than 0.53emu/gm for 7 diogenites, 6 eucrites and 1 howardite. By the thermomagnetic analysis, the I_s value of each achondrite is resolved into the saturation magnetization of kamacite, I_s (α), that of plessite, I_s (α+γ), that of taenite I_s (γ), and that of shreibersite, I_s (Ph). Results show that I_s (α)/I_s ≲ 0.40 for diogenites, whereas 1 ≳ I_s (α)/I_s ≳ 0.79 for eucrites and howardites, which indicate that Ni-content in metallic nickel-irons in diogenites is definitely larger than that in eucrites and howardites. On an I_s (α)/I_s versus I_s diagram, therefore, the three groups of achondrite are well separately grouped, just as so in the magnetic classification of chondrites.},
 pages = {219--232},
 title = {Magnetic Classification of Antarctic Achondrites},
 volume = {17},
 year = {1980}
}