Preliminary report on metamict cerianite from Nesoya, Lutzow-Holmbunkta, East Antarctica

    • Matsumoto Yukio
    • Department of Mineralogical Sciences and Geology, Faculty of Science, Yamaguchi University
    • Sakamoto Arata
    • Department of Mineralogical Sciences and Geology, Faculty of Science, Yamaguchi University

Abstract

Mineralogical studies of a blackish mineral with strong radioactivity from microcline pegmatites of Nesoya, Lutzow-Holmbukta, East Antarctica, were performed. This mineral has been completely or almost completely transformed into a metamict state. However, in a heat treatment (1000℃, 7 hours), the powder pattern is identical with cerianite, and the unit cell dimension calculated from the powder X-ray diffraction data is α_0=5.451A. According to the qualitative analysis by an electron probe X-ray microanalyzer, the mineral consists of lanthanoids and other elements, such as La, Ce, Pr, Nd, Sm, Eu, Gd, Th, Xe, Cs, Pb, Rh, etc. Both the X-ray diffraction data and chemical analysis identify this mineral as a metamict cerianite [Ce(Th)O_2].

Journal

Memoirs of National Institute of Polar Research. Special issue   [List of Volumes]

Memoirs of National Institute of Polar Research. Special issue 21, 103-111, 1982-03  [Table of Contents]

National Institute of Polar Research

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Codes

  • NII Article ID (NAID) :
    110000009470
  • NII NACSIS-CAT ID (NCID) :
    AA00733561
  • Text Lang :
    ENG
  • ISSN :
    03860744
  • Databases :
    NII-ELS 

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