A transmission electron microscope observation of 138.ANGS. period in Pb-As-S sulfosalts.

• OZAWA Tohru

  Mineralogical Institute, Graduate School of Science, University of Tokyo

• TACHIKAWA Osamu

  Mineralogical Institute, Graduate School of Science, University of Tokyo

抄録

A small crystal fragment whose diffraction pattern shows a long period of around 138Å was found under the electron microscope, and based upon its high-resolution TEM image the essential crystal structural features were discussed. It belongs to the rathite group of lead sulfarsenites. The crystal structures of the members of this group can be interpreted as various combinations of two different structural units, namely, sartorite unit “S” with about 9.8Å in width and rathite unit “R” with about 12.6Å in width. The present material has been proved to have an ordered arrangement of RSRSR·RSRSRSR. This result is consistent with the conclusion derived by Takéuchi(1970) that the crystal structure of each member of the rathite group is constructued by a regular arrangement of S and R units. Although the 138Å period is reported for rathite-IV, the characteristics of the diffraction pattern of the present phase appear to be different from those of rathite-IV. The occurrence of the present material is discussed.

収録刊行物

• Ｍｉｎｅｒａｌｏｇｉｃａｌ　Ｊｏｕｒｎａｌ

  Ｍｉｎｅｒａｌｏｇｉｃａｌ　Ｊｏｕｒｎａｌ 18 (3), 97-101, 1996

  一般社団法人　日本鉱物科学会

キーワード

• General Earth and Planetary Sciences
• General Environmental Science

詳細情報

• CRID: 1390282681522697728
• NII論文ID: 10008772665
• NII書誌ID: AA00739590
• DOI: 10.2465/minerj.18.97
• ISSN: 18814174
• ISSN: 05442540
• 本文言語コード: en
• データソース種別:
  • JaLC
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可