Mixed holmium cobaltite-chromite HoCo0.5Cr0.5O3 with orthorhombic perovskite structure (structure type GdFeO3, space group Pbnm) was obtained by solid state reaction of corresponding oxides in air at 1373 K. Room- and high-temperature structural parameters were derived from high-resolution X-ray synchrotron powder diffraction data collected in situ in the temperature range of 300-1140 K. Analys...

MINERALOGICAL and physical characteristics of natural chromites from Oman ophiolites have been recently investigated using M6ssbauer spectrocopy (MS), X-ray diffraction (XRD) and Scanning electron microscopy (SEM) by Al-Alawi et al. (1996). From the MS analysis together with the SEM data, they derived the chemical formula for specimens collected from two separate chromite deposits named Tawiyah...

“Laoshan Jade” is located in the Yangkou area of Sulu UHP metamorphic belt. This first time a systematic research study performed on its conventional gemological characteristics, mineral compositions, geochemical and petrogenesis using polarized light microscope, an electron probe microanalyzer (EMPA), X-ray fluorescence spectrometer (XRF), Raman spectrometer. The characteristics are consistent...

There is a high rate of casualty among miners in the world every year. One way to reduce accidents and increase safety mines use risk management process identify respond major hazards mines. The present study an attempt investigate assessment risks Faryab chromite underground In this paper, method AHP type-1 type-2 fuzzy sets used for assessment. Upon studying two (Makran Nemat), 45 were divide...