関連する実験動画
Updated: Jul 12, 2026

05:39
Shock Wave Application to Cell Cultures
Published on: April 8, 2014
まとめ
ショックを受けたクォーツは,高圧のシリカポリモルフであるスティショライトに変形することができます. この研究では,衝撃を受けた砂岩とクォーツにスティショビットを発見し,極端な圧力と温度条件下で新しい変換経路を示唆しました.
科学分野:
- 地質学 地質学 地質学
- ミネラロジーは,鉱物学です.
- ショック物理学 ショック物理学
背景:
- シュティショバイト (Stishovite) は,シリカの高圧ポリモーフである.
- 以前の研究によると,コエサイトはショックを受けたクォーツの共通産物である.
研究 の 目的:
- 爆発的にショックを受けたクォーツを含む岩石におけるスティショビットの形成を調査するために.
- ショック条件下におけるクォーツの変換メカニズムを理解する.
主な方法:
- 爆発的に衝撃を受けた砂岩,ノバキュライト,単結晶クォーツの分析.
- 顕微鏡検査および潜在的に他の分析技術を使用してスティショビットの分離および識別.
- ピークショック圧力 (150-280 kbar) と温度 (150-900°C) の推定.
主要な成果:
- 衝撃を受けた標本から少量のスティショビートが成功裏に分離されました.
- 分析した試料のいずれにもコエサイトは検出されなかった.
- ピーク圧力は150~280キロバーで,衝撃温度は150°C~900°Cでした.
結論:
- クォーツはショックの状態で,短距離の6座調相相へと逆転することができる.
- この相は,スティショボイトに変形することがあります.
- 隕石の衝突など,特定の条件下で,この相はコエサイトに逆転することもあります.
関連する概念動画
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Nuclear Stability
Protons and neutrons, collectively called nucleons, are packed together tightly in a nucleus. With a radius of about 10−15 meters, a nucleus is quite small compared to the radius of the entire atom, which is about 10−10 meters. Nuclei are extremely dense compared to bulk matter, averaging 1.8 × 1014 grams per cubic centimeter. If the earth’s density were equal to the average nuclear density, the earth’s radius would be only about 200 meters.
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