3 papers
cond-mat.mtrl-sci2025
Novel high symmetry super-hard C48 and C32 allotropes with ana and ukc original topologies: Crystal chemistry and DFT investigations
Samir F Matar
Novel high symmetry body centered carbon allotropes: cubic C48 and tetragonal C32 are proposed with respective original ana and ukc topologies. Devised from crystal structure engin…
cond-mat.mtrl-sci2025
Original mechanism of transformation from soft metallic (sp2/sp3) C12 to ultra-dense and ultra-hard (sp3) semi-conducting C12: Crystal chemistry and DFT characterizations
Samir F Matar
An original mechanism is proposed for a pressure-induced transformation of orthorhombic C12 from ground state normal pressure (NP) sp2/sp3 allotrope to ultra-dense and ultra-hard H…
cond-mat.mtrl-sci2025
Original Ultra-hard Orthorhombic Carbon allotropes C8 with lonsdaleite-type lon topology: Crystallographic and DFT investigations
Samir F Matar
The lon topology inherent to lonsdaleite C4 hexagonal diamond is shown to characterize three original carbon allotropes C8 in the orthorhombic system with irregular orientations of…