As a first step towards particle-scale modeling of clayey soils, we investigate the mechanical behavior and microstructure of assemblies of three-dimensional rectangular platy particles by means of the discrete element method. Several samples composed of particles of different levels of platyness (ratio of width to thickness) were numerically prepared and sheared to large deformations. We analy...

In situ x-ray diffraction measurements of MgSiO3 were performed at high pressure and temperature similar to the conditions at Earth's core-mantle boundary. Results demonstrate that MgSiO3 perovskite transforms to a new high-pressure form with stacked SiO6-octahedral sheet structure above 125 gigapascals and 2500 kelvin (2700-kilometer depth near the base of the mantle) with an increase in densi...

Ikan platy pedang hias adalah salah satu jenis ikan yang mempunyai nilai ekonomis tinggi. Hal ini didukung dengan banyaknya penggemar tidak hanya terbatas dari kelas ekonomi tinggi, namun juga kaum pinggiran, mulai anak-anak, remaja hingga orang dewasa. Penelitian dilaksanakan 2 minggu dibulan November 2022 di Jl. Pimpinan no. 3c Sei Kera Hilir I. Untuk metode dipakai pada mini riset kali mengg...

A new, simple, and fast one-pot synthesis of supported Au or Ag nanoparticles is implemented, for which a reactive Fe(II)-bearing green rust inorganic particle is used as an individual micro-reactor acting as both the reducing agent and support for the resulting metal nanoparticles. The mechanism involves both the solid-state oxidation of the green rust support (sulfate or carbonate) and the re...

Four polymorphs of Zn(OH)2 have now been recorded from an oxidised vein exposure near Milltown, Ashover, Derbyshire; sweetite, wfilfingite, ~,-Zn(OH)2, and ashoverite. The last is a new mineral, a tetragonal modification of Zn(OH)2 containing minor quantities of Pb, Cd and Ca. Its unit cell dimensions are a 6.825(2) and c 33.36(4)A, giving V = 1554A3; Z = 32; space group 141/amd, 141 md, or I7~...