萤石
亚稳态
格子(音乐)
六方晶系
半导体
镁
结晶学
材料科学
硅化物
环境压力
高压
化学
凝聚态物理
化学物理
热力学
硅
冶金
物理
光电子学
有机化学
声学
作者
Peter Cannon,E. T. Conlin
出处
期刊:Science
[American Association for the Advancement of Science (AAAS)]
日期:1964-07-31
卷期号:145 (3631): 487-489
被引量:70
标识
DOI:10.1126/science.145.3631.487
摘要
Magnesium silicide (Mg3Si) undergoes a transformation from a cubic (fluorite) type lattice to a hexagonal lattice at pressures above about 25 kilobars and temperatures above 900 degrees C. There is an increase of density of about 15 percent associated with this structure change. Both the parent and product substances are semiconductors, but of different resistivities. The high pressure phase may be recovered and is indefinitely metastable at normal ambient conditions.
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