Melting of LiF and NaCl to 1 Mbar: Systematics of Ionic Solids at Extreme Conditions
Melting of LiF and NaCl to 1 Mbar: Systematics of Ionic Solids at Extreme Conditions
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DOI：
10.1103/physrevlett.78.4589
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发表时间：
1997-06
影响因子：
8.6
通讯作者：
R. Boehler;M. Ross;D. B. Boercker
中科院分区：
文献类型：
--
作者：
R. Boehler;M. Ross;D. B. Boercker
我们报告的第一个金刚石电池数据的熔化曲线的LiF和NaCl高达1毫巴（100 GPa）。NaCl的熔化曲线与冲击波数据一致，并且由于$B1（\mathrm{NaCl}）\ensuremath{-}B2（\mathrm{CsCl}）$转变，在290 kbar处出现斜率突变。LiF保持$B1$到最高的压力，和分子动力学模拟预测，熔融LiF保留一个简单的立方$B1$样结构。最近的美因茨金刚石砧熔化曲线的MgO，LiF，KBr，KCl，CsI和NaCl的曲线图表明，在非常高的压力下，所有的熔化曲线具有非常相似的斜率，接近1- 2 K/kbar的数量级的值。
We report the first diamond cell data for the melting curves of LiF and NaCl up to 1 Mbar (100 GPa). The melting curve of NaCl is in agreement with shock data and shows a break in slope at 290 kbar due to the $B1(\mathrm{NaCl})\ensuremath{-}B2(\mathrm{CsCl})$ transition. LiF remains $B1$ to the highest pressure, and molecular dynamic simulations predict that molten LiF retains a simple-cubic $B1$-like structure. A plot of the recent Mainz diamond anvil melting curves for MgO, LiF, KBr, KCl, CsI, and NaCl shows that at very high pressure all the melting curves have very similar slopes approaching a value of order 1--2 K/kbar.