Huangite from Okumanza, Gunma Prefecture, Japan.
スポンサーリンク
概要
- 論文の詳細を見る
Huangite was found from the type locality of minamiite in sulphuric altered andesite from Okumanza, Gunma Prefecture, Japan. EDS analyses indicate that "alunite" crystals are composed of very minute intergrowth of alunite, natroalunite, minamiite and huangite. The domain corresponding to each species are 5 to 100 μm in width. In the present huangite the ranges of A-site cations in general formula of alunite group minerals, AB<SUB>3</SUB>(SO<SUB>4</SUB>)<SUB>2</SUB>(OH)<SUB>6</SUB>, vary from Ca<SUB>0.46</SUB>(K+Na)<SUB>0.10</SUB> (Na>>K) to Ca<SUB>0.35</SUB>(K+Na)<SUB>0.26</SUB> (K>Na) on the basis of Al = 3, that is, they correspond to approximately 90∼70 % mole of huangite end member, Ca<SUB>0.5</SUB>Al<SUB>3</SUB> (SO<SUB>4</SUB>)<SUB>2</SUB> (OH)<SUB>6</SUB>. Distinct compositional gaps are observed between 55 to 80 % Ca mole on Na - Ca join and 5 to 60 % Ca mole on K - Ca join in K - Na - Ca diagram of alunite group mineral.
- 日本鉱物科学会の論文
日本鉱物科学会 | 論文
- シリケイトメルト中の水の拡散
- 岡山市北西部, 日近花崗閃緑岩体の岩石記載および全岩化学組成
- 高エネルギー陽子マイクロビームによる鉱物中の水素定量分析法の開発
- 日本海竹島海山(仮称)のかんらん岩捕獲岩の成因とその意義
- 高輝度 高指向 連続光・直線偏光の単結晶X線回折への恩恵