论文标题
gdbo $ _3 $和ybo $ _3 $纳米晶体压缩
GdBO$_3$ and YBO$_3$ Nanocrystals under Compression
论文作者
论文摘要
据报道，对伪远射型含量的纳米晶体的高压X射线衍射研究分别为17.4（2）和13.4（2）和13.4（2）GPA。在当代出版物的背景下，提出和讨论了随后对室温压力卷方程的确定，这与这项工作的发现相矛盾。特别是，发现GDBO $ _3 $和YBO $ _3 $的等温散装模量分别为170（13）和163（13）GPA，比最近的发现小于50％。我们的实验结果提供了GDBO $ _3 $和YBO $ _3 $的高压可压缩性行为的准确修订，这与同构硼酸盐中已知的Systematics一致，并从头开始计算。最后，我们讨论了实验/分析错误如何导致其他地方报道的不可靠结论。
High-pressure X-ray diffraction studies on nanocrystals of the pseudo-vaterite-type borates GdBO$_3$ and YBO$_3$ are herein reported up to 17.4(2) and 13.4(2) GPa respectively. The subsequent determination of the room-temperature pressure-volume equations of state is presented and discussed in the context of contemporary publications which contradict the findings of this work. In particular, the isothermal bulk moduli of GdBO$_3$ and YBO$_3$ are found to be 170(13) and 163(13) GPa respectively, almost 50% smaller than recent findings. Our experimental results provide an accurate revision of the high-pressure compressibility behaviour of GdBO$_3$ and YBO$_3$ which is consistent with the known systematics in isomorphic borates and previous ab initio calculations. Finally we discuss how experimental/analytical errors could have led to unreliable conclusions reported elsewhere.
