Although seawater exposure is relatively common, there are few studies that couple the microscopic characterization to mechanical/ macroscopic behavior of cement-based materials, by using a reformulation with all its multiple salts in laboratory. The experimental study includes effect salinity, cement type, and specimens geometry on degradation phenomenon. solution was recomposed laboratory dis...

Exemplifed by various grades of magnesium hydroxide used as halogen-free flame-retardant fillers, the regularities destruction and dehydration process depending on size disperse phase particles – from large (45 microns) to nanoparticles (50–100 nm) were considered for first time. By DTA TGA methods, effect temperature beginning decomposition, range reaction, kinetics volumes water release, ther...

The new mineral theophrastite, Ni(OH)2 , from Unst, is Mg-bearing and occurs associated with a very poorly crystalline Ni-containing mixed hydroxide of the pyroaurite type and/or zaratite on chromitite. X-ray powder diffraction data show a shift in d spacing toward brucite compared with pure Ni(OH)2. Infrared, thermal, chemical, optical, and physical data are presented together with indexed pow...

Layered double hydroxides (LDHs), a class of two-dimensional (2D) brucite-like layers, have been effectively applied in diverse fields. However, the current synthesis methods restrict situ scaling-up and tunable production LDH-based materials. Inspired by growing characteristic “Bryophyllum pinnatum”, sacrificial co-sputtered Zn?Al transition layer was introduced for first time to grow scalable...

The principles of lattice dynamics are briefly reviewed in this paper, and from these principles a simple, generally applicable lattice vibrational spectrum is proposed for minerals. The spectrum can be used to calculate the thermodynamic functions in the harmonic approximation. The model proposed is consistent with lattice dynamics and is sufficiently detailed in its assumptions about the dist...