Electron microscopy studies of schungite

The first electron microscopy studies of schungite conducted in October 2018 indicated that schungite seems visually as a black stone, this is though an exciting composite material on microscopic scale, the different components of which are actually separated from each other but could still exist together as compact material. The picture of electron microscopy clearly indicates that some areas seemed lighter than the matrix around them and this could have been caused by the different atomic number, density and conductivity.
The mapping of the elements having followed the first studies gave additional information on just which components of schungite are located on the surface in different places. If to assemble the pictures of electron microscopy and mapping of elements, it could be seen that the light areas match mostly the silicon dioxide (SiO2), surrounded by the carbon material with good conductivity which is depicted as dark on the picture. The pictures with greater zoom of this carbon material indicated that this could be graphite-type carbon material consisting of the closely packed graphene sheets.
 
 
Murtud šungiidi killu värske pind
 
The fresh surface of broken piece of schungite indicated that this is composite material with even spread of different components all over the area.  
 
Suurema suurendusega elektronmikroskoobi pilt šungiidi killu pinnast
 
The picture of electron microscopy with greater zoom about the surface of piece of schungite. The size of the lighter pieces inside the black main mass remains mostly in-between 1-10 micrometre.
 
erinev heledus on tingitud nii aatominumbrist
 
The picture with greater zoom indicates that the darker and lighter areas are clearly separated and these are probably different materials, the different lightness of which is caused by atomic number as well as conductivity.
 
süsinikmaterjaliga, mis on grafiidi sarnane
 
The picture with greater zoom of the dark area between the light areas. This is carbon material which is similar to the graphite, but the graphene sheets therein do not seem to be oriented flat just as in case of clean graphite. Nevertheless this is well-conductive material, as no charging is noted on the picture of electron microscopy.
 
Suurema suurendusega pilt tumedast
 
The picture with greater zoom of the dark area between the light areas. This is carbon material which is similar to the graphite, but the graphene sheets therein do not seem to be oriented flat just as in case of clean graphite. Nevertheless this is well-conductive material, as no charging is noted on the picture of electron microscopy.
 
Elementide kaardistuse koht väikseimal alal
 
The place of mapping of elements on the smallest area. The place was chosen so that in mapping the lighter and darker areas of the picture of the electron microscopy will be on. Later, the mapping indicated that the lighter areas on the picture mostly match with silicon dioxide (SiO2). The darker areas match carbon material with good conductivity – probably this is graphite-type material.
 
Elementide kaardistamiseks valitud ala katseobjekti pinnal
 
The area chosen for the mapping of elements on the surface of the test object. The place was chosen so that it would describe the whole material as well as possible.
 
 
 
Šungiidi elektronmikroskoopia uuringud
Šungiidi elektronmikroskoopia uuringud
Šungiidi elektronmikroskoopia uuringud
Šungiidi elektronmikroskoopia uuringud
Šungiidi elektronmikroskoopia uuringud
Šungiidi elektronmikroskoopia uuringud
Šungiidi elektronmikroskoopia uuringud