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Updated: Jul 12, 2026
08:14
Atom Probe Tomography Analysis of Exsolved Mineral Phases
Published on: October 25, 2019
まとめ
メキシコで発見された新しいトゥルマリン鉱物は,ユニークな物理的性質と結晶構造を示しています. 化学分析により,この鉱石はフェリック・トゥルマリンであり,既知のエルベイト・シュール・シュール・シュール・ドラバイト系とは異なるものであることが示唆されている.
科学分野:
- ミネラロジーは,鉱物学です.
- クリスタログラフィーです.
- 地質化学 地質化学
背景:
- ツアーマリン群の鉱物は,多様な化学組成と結晶構造を持つ複雑なボロシリケートです.
- 観光石の既存の分類には,エルバイト・シュール,シュール・ドラバイトなどのシリーズが含まれています.
- 珍しい鉱物の発生は,地質学的過程の洞察を提供し,鉱物学の知識を広げることができます.
研究 の 目的:
- メキシコ・サン・ルイス・ポトシのメキシキティクから発見された新しいトゥルマリン標本の特徴を明らかにする.
- この珍しいツルマリンの結晶学および化学的性質を決定するために.
- トゥルマリンのグループ内の鉱物の分類を確かめるために.
主な方法:
- ガニオメーターを用いた結晶測定法により,結晶の形状と寸法が決定される.
- 密度および屈折率を含む物理的特性測定.
- 細胞の体積と密度に基づいて再計算された化学分析.
主要な成果:
- 10mmまでの濃い茶色のプリズマ結晶がリオライトで見つかりました.
- 明確な結晶面 ({1120}, {3030}, {1011}, {0221}) とc/a比率0.4521が記録されました.
- 観光石は,高密度,高屈折率,極端な二重断裂の異常な組み合わせを示しています.
- 化学分析は,既定のエルベイト-シュールとシュール-ドラバイトシリーズの外にある鉄状のトゥルマリン組成を裏付けている.
結論:
- 記述されたツルマリンは,新しい鉱物種または重要な新しい品種を表しています.
- そのユニークな性質は,現在のトゥルマリン分類体系に異議を唱えている.
- その結晶化学的関係と地質学的意義を完全に理解するために,さらなる研究が必要である.
関連する概念動画
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03:02Colors and Magnetism
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When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human eye.
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When diamagnetic materials are placed under an external magnetic field, the moments opposite to the field are induced. Hence, the susceptibility for diamagnets has a minimal negative value of 10-5–10-6. Since...
When diamagnetic materials are placed under an external magnetic field, the moments opposite to the field are induced. Hence, the susceptibility for diamagnets has a minimal negative value of 10-5–10-6. Since...