Application of the EBSD Technique in the Study of Porosity and Permeability in Deformation Bands in Sandstone.

Deformation bands are common constituents of porous clastic fluid reservoirs. Various techniques have been used to study deformation band structure and the associated changes in porosity and permeability. However, the use of electron backscatter diffraction technique is limited.

On the forensic relevance of tattoos: distinguishing black inks with energy dispersive spectroscopy and backscattered scanning electron microscopy.

Purpose: This study aimed to analyze black tattoo inks by means of energy dispersive spectroscopy and backscattered scanning electron microscopy.

Methods: The sample consisted of five types of commercial tattoo pigments of the black colour (Easy Glow, Electric Ink, Iron Works, Master Ink, and Viper). An Energy Dispersive Spectroscopy (EDS) detector (Silicon Drift Detector - SDD - type) attached to a Scanning Electron Microscope (SEM) device (Tescan Vega3 LMU, Libusina, Czech Republic) was used.

Vibrational spectroscopic characterization of the sulphate mineral leightonite K2Ca2Cu(SO4)4·2H2O--implications for the molecular structure.

The mineral leightonite, a rare sulphate mineral of formula K2Ca2Cu(SO4)4·2H2O, has been studied using a combination of electron probe and vibrational spectroscopy. The mineral is characterized by an intense Raman band at 991 cm(-1) attributed to the SO4(2-) ν1 symmetric stretching mode. A series of Raman bands at 1047, 1120, 1137, 1163 and 1177 cm(-1) assigned to the SO4(2-) ν3 antisymmetric stretching modes.