Science. 1993 Feb 5;259(5096):786-8. doi: 10.1126/science.259.5096.786.
The use of high-temperature nuclear magnetic resonance (NMR) spectroscopy provides a means of investigating the structure of refractory aluminate liquids at temperatures up to 2500 K. Time-averaged structural information indicates that the average aluminum coordination for magnesium aluminate (MgAl(2)O(4)) liquid is slightly greater than for calcium aluminate (CaAl(2)O(4)) liquid and that in both liquids it is close to four. Ion dynamics simulations for these liquids suggest the presence of four-, five-, and six-coordinated aluminate species, in agreement with NMR experiments on fast-quenched glasses. These species undergo rapid chemical exchange in the high-temperature liquids, which is evidenced by a single Lorentzian NMR line.
高温核磁共振（NMR）光谱的使用提供了一种在高达 2500 K 的温度下研究难熔铝酸盐液体结构的手段。时间平均结构信息表明，镁铝酸镁（MgAl（2）O（4））液体的平均铝配位数略大于钙铝酸钙（CaAl（2）O（4））液体，并且在这两种液体中都接近四。这些液体的离子动力学模拟表明存在四、五和六配位的铝酸盐物种，与快速淬火玻璃的 NMR 实验一致。这些物种在高温液体中经历快速的化学交换，这可以通过单个洛伦兹 NMR 线来证明。
