| 漫谈物质密度* |
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| 引用本文： | 施倪承,李国武.漫谈物质密度*[J].自然杂志,2009,31(4):228. |
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| 作者姓名： | 施倪承 李国武 |
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| 作者单位： | 1.教授，2副教授, 中国地质大学(北京), 北京100083 |
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| 摘 要： | 物质的密度是与组成该物质的元素种类及其原子排列的疏密程度有关。在元素种类相同时固态物质的密度取决于晶体结构及其化学键特性。探讨了地球内部各圈层物质的密度状态及其差异的原因，指出了随着深度的增加，即温度和压力的增加，共价键及金属键的键性有增加的趋势。阐述了天体物质的密度差异。笔者认为研究地球各圈层物质的温度和压力状况有利于晶体材料的开发和改进。
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| 关 键 词： | 密度 晶体结构 化学键性质 地球物质的密度 行星及恒星的密度 |
| 收稿时间： | 2009-01-29 |
| 修稿时间： | 2009-03-01 |
A Talk for Densities of Materials |
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| SHI Ni-cheng,LI Guo-wu.A Talk for Densities of Materials[J].Chinese Journal of Nature,2009,31(4):228. |
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| Authors: | SHI Ni-cheng LI Guo-wu |
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| Affiliation: | 1.Professor, 2Associate Professor, China University of Geosciences (Beijing), Beijing 100083，China |
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| Abstract: | Material density is relative to species of elements and their atomic arrangement. Solid material density lies on crystal structure and chemical bonding properties. It is illustrated that the state of density in the Earth’s interior layers and the result of their distinctness. As the depth increases, temperature and pressure will increase, the composition of metallic bond and covalent bond will increase. The density distinctness of celestial bodies is discussed. The research of the state of temperature and pressure in the Earth’s layers will conducive to the exploiture and improvement of synthetic materials. |
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| Keywords: | density crystal structure chemical bonding properties density of Earth’s materials the densities of planet and fixed star |
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