Synthesis and characterization of a binary noble metal nitride.
There has been considerable interest in the synthesis of new nitrides because of their technological and fundamental importance. Although numerous metals react with nitrogen there are no known binary nitrides of the noble metals. We report the discovery and characterization of platinum nitride (PtN), the first binary nitride of the noble metals group. This compound can be formed above 45-50 GPa and temperatures exceeding 2,000 K, and is stable after quenching to room pressure and temperature. It is characterized by a very high Raman-scattering cross-section with easily observed second- and third-order Raman bands. Synchrotron X-ray diffraction shows that the new phase is cubic with a remarkably high bulk modulus of 372(+/-5) GPa.
Gregoryanz
Eugene
E
Université Pierre et Marie Curie, LMCP, case 115, 4 place Jussieu, Paris, France. e.gregoryanz@gl.ciw.edu
Sanloup
Chrystele
C
Somayazulu
M
M
Badro
James
J
Fiquet
Guillaume
G
Mao
Ho-Kwang
HK
Hemley
Russell J
RJ
D003198:Computer Simulation; D008422:Materials Testing; D008670:Metals / Q000138:chemical synthesis / Q000737:chemistry; D008958:Models, Molecular; D008968:Molecular Conformation; D017672:Nitrogen Compounds / Q000138:chemical synthesis / Q000737:chemistry*; D017671:Platinum Compounds / Q000138:chemical synthesis / Q000737:chemistry*; D011312:Pressure; D013059:Spectrum Analysis, Raman; D013499:Surface Properties
D008670:Metals; D017672:Nitrogen Compounds; D017671:Platinum Compounds