Study on variations of bonding character and structural stability in rsenic minerals

• Project/Area Number: 19740325
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Single-year Grants
• Research Field: Petrology/Mineralogy/Science of ore deposit
• Research Institution: University of Tsukuba
• Principal Investigator: KYONO Atsushi University of Tsukuba, 大学院生命環境科学研究科, 講師 (40375431)
• Project Period (FY): 2007 – 2008
• Project Status: Completed (Fiscal Year 2008)
• Budget Amount: ¥2,900,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥300,000); Fiscal Year 2008: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000); Fiscal Year 2007: ¥1,600,000 (Direct Cost: ¥1,600,000)
• Keywords: ヒ素 / ヒ酸 / ヤーンテーラー効果 / 硫化ヒ素 / 共有結合 / 分子性結晶 / 相転移 / 鶏冠石 / パラ鶏冠石 / 光誘起相転移 / As_4S_4 / As_4Se_4 / 光化学反応

Research Abstract

ヒ素は自然界には+5から-3までの幅広い酸化状態の化学種として存在している.本研究ではヒ素鉱物の結合状態の変化と結晶構造に関する研究を行った.As^<5+>のヒ酸化鉱物は,強固な単位であるヒ酸塩(AsO_4)がその結晶構造の骨格となり非常に幅広い構造多様性を作り出している.一方,As^0の硫化ヒ素鉱物は,容易にAs-S-As結合を変化させ相転移を引き起こしている.

Research Products

• [Journal Article] Molecular conformation and anion configuration variations for As_4S_4 and As_4Se_4 in an anion-substituted solid solution. (2009)
  • Author(s): Atsushi Kyono
  • Journal Title: American Mineralogist 94 Pages: 451-460
  • Peer Reviewed
• [Journal Article] Molecular conformation and anion configuration variations for As_4S_4 and As_4Se_4 in an anion-substituted solid solution (2009)
  • Author(s): At sushi Kyono
  • Journal Title: American Mineralogist 94(In press)
  • Peer Reviewed
• [Journal Article] 鉱物表面状態に起因する化学組成の測定誤差 (2008)
  • Author(s): 興野純
  • Journal Title: 岩石鉱物科学 37 Pages: 78-87
  • NAID: 10020985342
  • Peer Reviewed
• [Journal Article] Compositional variability and crystal structural features of guanacoite. (2008)
  • Author(s): Atsushi Kyono
  • Journal Title: American Mineralogist 93 Pages: 501-507
  • Peer Reviewed
• [Journal Article] Compositional variability and crystal structural features of guanacoite (2008)
  • Author(s): Atsushi Kyono
  • Journal Title: American Mineralogist 93 Pages: 501-507
  • Peer Reviewed
• [Journal Article] 鶏冠石からパラ鶏冠石への光誘起相転移メカニズム (2007)
  • Author(s): 興野純
  • Journal Title: 日本結晶学会誌 49 Pages: 321-327
  • NAID: 10020029385
  • Peer Reviewed
• [Journal Article] Experimental study of the effect of light intensity on arsenic sulfide (As_4S_4) alteration. (2007)
  • Author(s): Atsushi Kyono
  • Journal Title: Journal of Photochemistry and Photobiology A : Chemistry 189 Pages: 15-22
  • Peer Reviewed
• [Journal Article] 鶏冠石からパラ鶏冠石への光誘起相転移メカニズム (2007)
  • Author(s): 興野 純
  • Journal Title: 日本結晶学会誌 49 Pages: 321-327
  • NAID: 10020029385
• [Journal Article] Experimental study of the effect of light intensity on arsenic sulfide(As_4S_4)alternation (2007)
  • Author(s): Atsushi Kyono
  • Journal Title: Journal of Photochemistry and Phobiology A:Chemistry 189 Pages: 15-22
  • Peer Reviewed
• [Presentation] Effect of selenium incorporation on crystal structure of arsenic sulfide (2008)
  • Author(s): At sushi Kyono
  • Organizer: XXI Congress of the International Union of Crystallography
  • Place of Presentation: 大阪国際会議場
  • Year and Date: 2008-08-26
• [Presentation] Effect of selenium incorporation on crystal structure and crystallization properties of realgar (As_4S_4) (2008)
  • Author(s): Atsushi Kyono
  • Organizer: 日本地球惑星科学連合大会
  • Place of Presentation: 千葉
  • Year and Date: 2008-05-25
• [Presentation] Effect of selenium incorporation on crystal structure and crystallization properties of realgar (As_4S_4) (2008)
  • Author(s): Atsushi Kyono
  • Organizer: 日本地球惑星科学連合2008年大会
  • Place of Presentation: 千葉県幕張メッセ
  • Year and Date: 2008-05-25
• [Presentation] Effect of selenium incorporation on crystal structure of arsenic sulfide (As_4S_4) (2008)
  • Author(s): Atsushi Kyono
  • Organizer: XXI Congress of the International Union of Crystallography
  • Place of Presentation: 大阪
• [Presentation] 鶏冠石の光変質に与える光強度効果とパラ鶏冠石への相転移モ分レの実験的検証 (2007)
  • Author(s): 興野純
  • Organizer: 日本地球惑星科学連合2007年大会
  • Place of Presentation: 幕張メッセ国際会議場
  • Year and Date: 2007-05-21
• [Presentation] 鶏冠石の光変質に与える光強度効果とパラ鶏冠石への相転移モデルの実験的検証 (2007)
  • Author(s): 興野 純
  • Organizer: 日本地球惑星科学連合大会
  • Place of Presentation: 千葉
  • Year and Date: 2007-05-20
• [Remarks] ホームページ等
  • URL: http://www.geol.tsukuba.ac.jp/~mineralogy_web/kyono_HP/index.html