| タイトル | Quartz and feldspar glasses produced by natural and experimental shock. |
| 著者（英） | Hornemann, U.; Stoeffler, D. |
| 発行日 | 1972-09-30 |
| 言語 | eng |
| 内容記述 | Refractive index, density, and infrared absorption studies of naturally and experimentally shocked-produced glasses formed from quartz, plagioclase, and alkali-feldspar confirm the existence of two main groups of amorphous forms of the framework silicates: solid-state and liquid-state glasses. These were apparently formed as metastable release products of high-pressure-phases above and below the glass transition temperatures. Solid-state glasses exhibit a series of structural states with increasing disorder caused by increasing shock pressures and temperatures. They gradually merge into the structural state of fused minerals similar to that of synthetic glasses quenched from a melt. Shock-fused alkali feldspars can, however, be distinguished from their laboratory-fused counterparts by infrared absorption and by higher density. |
| NASA分類 | GEOPHYSICS |
| レポートNO | 72A44136 |
| 権利 | Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/460680 |
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