Interuniversity Collection of Proceedings "Physical and chemical aspects of the study of clusters, nanostructures and nanomaterials"
Founded at 2009


Phase transformations of LA3 and LA5 diamond polymorph

V.A. Greshnyakov, E.A. Belenkov

Chelyabinsk State University, Chelyabinsk, Russia

DOI: 10.26456/pcascnn/2019.11.458

Abstract: Ab initio investigations of possible methods for obtaining diamond-like LA3 and LA5 phases, consisting of polymerized cyclobutane rings, were performed. It was established that LA3 phase can be obtained from L6 AA and L4-8 AA graphites at pressures from 50 to 67 GPa, whereas LA5 phase can be formed from L6 AB and L4-8 AB graphites at pressures from 45 to 71 GPa. In addition, LA5 phase can be obtained by strong uniaxial compressing of LA3 phase at pressures above 160 GPa.

Keywords: diamond, diamond-like phases, ab initio calculations, crystal structure, phase transitions.

Bibliography link:

Greshnyakov, V.A. Phase transformations of LA3 and LA5 diamond polymorph / V.A. Greshnyakov, E.A. Belenkov // Physical and chemical aspects of the study of clusters, nanostructures and nanomaterials: Interuniversity collection of proceedings / Ed. by V.M. Samsonov, N.Yu. Sdobnyakov. – Tver: TSU, 2019. – I. 11. – P. 458-465.

Full text (in Russian): download PDF file

Comments are closed.