Carbon nanotubes are ideal candidates for the mechanical reinforcement of ceramic due to their excellent mechanical properties, high aspect ratio and nanometer scale diameter. In this study, the effects of multi-walled carbon nanotubes (MWCNTs) on the mechanical properties of diopside (Di) scaffolds fabricated by selective laser sintering were investigated. Results showed that compressive stren...

Five clinopyroxenes containing various amounts of six-coordinated Si (VISi) in the Na(Mg0.5Si0.5) Si2O6 (NaPx)-NaAlSi2O6 (jadeite) system have been synthesized at 15 GPa and 1600 °C and their structures studied with single-crystal X-ray diffraction and Raman spectroscopy. The results show that clinopyroxenes with VISi ≤ 0.33 atoms per formula unit (apfu) possess C2/c symmetry, whereas those wit...

We present evidence that a rock sample found in the Koryak Mountains in Russia and containing icosahedrite, an icosahedral quasicrystalline phase with composition Al(63)Cu(24)Fe(13), is part of a meteorite, likely formed in the early solar system about 4.5 Gya. The quasicrystal grains are intergrown with diopside, forsterite, stishovite, and additional metallic phases [khatyrkite (CuAl(2)), cup...

Research subject. Nephrite and related rocks from the Nyrdvomenshor deposit in Polar Urals were studied. The is located exocontact of Rai-Iz ultramafic massif, confined to Main Ural Fault. was developed process geological exploration; a license has been issued for part deposit. Aim. To study nephrite alluvial deposit, formulate model its origin. Methods. Qualitative characteristics assessed vis...

In recent years, a new type of material called Philippines “Dushan jade” has appeared in the gemstone market China. This material, very similar appearance and physical properties to Dushan jade, an important ancient jade with long history China, is causing confusion poses identification difficulties. Microscopy, electron probe microanalysis, Fourier transform infrared (FTIR) spectroscopy, Raman...