別子鉱床酸化帯から見出されたドラフォッス鉱 Delafossite from the oxidation zone of the Besshi ore deposit

この論文にアクセスする

この論文をさがす

著者

抄録

Delafossite, CuFeO<sub>2</sub>, was found from the oxidation zone of the Besshi ore deposit which is embedded in Sambagawa metamorphic rocks, and is situated at the central Shikoku, Japan. It occurs as botryoidal aggregates in small cavities and as crusts filling cracks of oxidated ore in association with the supergene minerals such as native copper, cuprite, malachite, brochantite, chrysocolla, cuproallophane, hematite and goethite. It is black with submetalic luster, opaque, and pale yellowish white color in reflected light. The unit cell parameters are a = 3.020 (5) and c = 17.17 (3) Å. Delafossite from Besshi is chemically characterized by relatively high Zn content up to 9.9 wt% as ZnO. The empirical formulae with highest and lowest Zn content are (Cu<sub>0.89</sub>Zn<sub>0.11</sub>)<sub>Σ</sub><sub>1.00</sub> (Fe<sub>0.88</sub>Zn<sub>0.07</sub>Al<sub>0.03</sub>Ti<sub>0.01</sub>)<sub>Σ</sub><sub>0.99</sub>O<sub>2</sub> and (Cu<sub>.0.91</sub>Zn<sub>0.09</sub>)<sub>Σ</sub><sub>1.00</sub>(Fe<sub>0.95</sub>Zn<sub>0.01</sub>Al<sub>0.01</sub>)<sub>Σ</sub><sub>0.97</sub>O<sub>2</sub> respecrively. The general formula of delafossite can be expressed as (Cu<sup>1+</sup><sub>1-x</sub>Zn<sup>2+</sup><sub>x</sub>)(Fe<sup>3+</sup><sub>1-x</sub>Zn<sup>2+</sup><sub>x</sub> )O<sub>2</sub> or (Cu<sup>1+</sup><sub>1-x</sub>Zn<sup>2+</sup><sub>x</sub>)(Fe<sup>3+</sup><sub>1-x</sub>[]<sub>x/3</sub>)O<sub>2</sub>. Delafossite was formed by the decomposition of chalcopyrite ore associated with a small amount of sphalerite under the supergene environments.

収録刊行物

  • 岩石鉱物科学  

    岩石鉱物科学 37(4), 91-95, 2008-07-30 

    日本鉱物科学会

参考文献:  19件

参考文献を見るにはログインが必要です。ユーザIDをお持ちでない方は新規登録してください。

各種コード

  • NII論文ID(NAID)
    10021369713
  • NII書誌ID(NCID)
    AA1146088X
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    1345630X
  • NDL 記事登録ID
    9646276
  • NDL 雑誌分類
    ZM46(科学技術--地球科学--岩石・鉱物・鉱床)
  • NDL 請求記号
    Z15-117
  • データ提供元
    CJP書誌  NDL  J-STAGE 
ページトップへ