Department of Physics, South China University of Technology, Guangzhou 510640, China.
J Chem Phys. 2013 Jan 14;138(2):024307. doi: 10.1063/1.4774022.
The vibrational and structural properties of a hydrogen-rich group IVa hydride, Sn(CH(3))(4), have been investigated by combining Raman spectroscopy and synchrotron x-ray diffraction measurements at room temperature and at pressures up to 49.9 GPa. Both techniques allow the obtaining of complementary information on the high-pressure behaviors and yield consistent phase transitions at 0.9 GPa for the liquid to solid and 2.8, 10.4, 20.4, and 32.6 GPa for the solid to solid. The foregoing solid phases are identified to have the orthorhombic, tetragonal, monoclinic crystal structures with space groups of Pmmm for phase I, P4/mmm for phase II, P2/m for phase III, respectively. The phases IV and V coexist with phase III, resulting in complex analysis on the possible structures. These transitions suggest the variation in the inter- and intra-molecular bonding of this compound.
通过室温下的拉曼光谱和同步加速器 X 射线衍射测量以及高达 49.9 GPa 的压力，研究了富含 IVa 族氢的氢化锡（Sn(CH(3))(4)）的振动和结构特性。这两种技术都可以提供有关高压行为的互补信息，并在 0.9 GPa 时产生一致的相变，从液体到固体，以及在 2.8、10.4、20.4 和 32.6 GPa 时从固体到固体。上述固体相被确定为具有正交、四方和单斜晶体结构，空间群分别为 I 相的 Pmmm、II 相的 P4/mmm 和 III 相的 P2/m。相 IV 和相 V 与相 III 共存，导致对可能结构的复杂分析。这些转变表明该化合物的分子间和分子内键合发生了变化。
