【摘要】 氮化铂(Pt-N)是高温高压条件下合成的第一种块体二元贵金属氮化物,由于该化合物具有高的体弹性模量和特殊的电子结构从而吸引了世界范围内一些理论研究者的目光.Pt-N中金属原子的质量远远大于非金属原子的质量,因此X射线衍射仅能确定Pt原子的位置,拉曼光谱虽然能限制N原子的对称性,但仍不能确定其具体位置.以上因素使得确定这种新合成物质的晶体结构成了理论研究的焦点,这些工作已经在高压科学中开拓了一个新的领域,即贵金属元素氮化物的高压合成与物性研究.更多还原

【Abstract】 Platinum nitride was the first noble metal binary nitride to be synthesized in crystal form under high pressure and high temperature. It has stimulated many theoretical studies on account of its abnormally high bulk modulus of about 372 GPa and intriguing electronic properties. Although X-ray diffraction can determine the position of the Pt atom, the much smaller mass of N makes it impossible to determine the exact positions of the N atoms. By means of Raman-scattering the symmetry of the N atoms can be confined, but their exact positions are still unclear. Therefore, investigations have mostly focused on determining the crystal structure of the Pt-N system, and have opened a new area of high-pressure research: the synthesis and characterization of noble metal nitrides under high pressure.更多还原