Study On The Mineralogical Characteristics And Genesis Of The Euclase In Dayu County, Jiangxi Province

The Euclase is a rare gemstone mineral in the world,and it is produced in North America,South America,Europe,Africa,Asia,and Australia,but the output is particularly small.The blue pillar stone studied in this paper is produced in Dayu,Jiangxi.The color of Jiangxi Dayu Euclase is colorless,transparent,white,light yellow to dark yellow.The crystal form is granular,short columnar,long columnar,with a set of parallel{010}complete cleavage,and the two groups are parallel{100}and{001}Moderate cleavage.The cleavage surface gloss is pearl luster,the crystal surface luster is glass luster,the fracture luster is grease luster,and the fracture is shell-like.Transparency is translucent to transparent.No fluorescence.The specific gravity is 3.08.Under the polarized light microscope and micro-Raman spectroscopy,the internal structure,inclusion morphology and types of the large and Euclase in Jiangxi were observed.Among them,the shape of the fluid inclusions was mostly rectangular,and there were two-phase and three-phase fluid inclusions.And arranged in a streamline shape with the cleavage;the fluid inclusions are mostly three-phase,and the composition of the three-phase inclusions is liquid water,liquid CO₂and gaseous CO₂ measured by micro-Raman;quartz crystals are found in the solid inclusions.Scanning electron microscopy?SEM?and X-ray energy spectroscopy?EDS?tests can be used to observe the surface micro-morphology,element type and elemental content of the crystal of the uranium sulphate in Jiangxi.The layered structure can be seen on the surface of the crystal,and the element content and Euclase The measurable elements of the chemical formula match.The elemental content of the Euclase was analyzed by EMPA.X-ray fluorescence spectroscopy,Fourier transform infrared spectroscopy,micro-Raman spectroscopy,and polycrystalline X-ray diffraction spectroscopy?XRD?were used to study the crystals and their circumferences produced in Jiangxi Residenza.Analysis of chemical element content,Fourier transform infrared spectroscopy,ultraviolet fluorescence spectroscopy,inclusion mineral composition,crystal surface morphology and structural characteristics of the rock,mineral composition of the crystal and its surrounding rock,and Euclase analysis of Jiangxi Dayu and the cause temperature,salinity,etc.of the Euclase.