Ключевые слова: alloy, background, basic material, chemical, chemical element, chemistry, crystal, element, elemental, freiberg, geology, glossy, group, high purity, highly pure, industrial, industry, isolated, mashed potato, material, metallic, metallurgy, mineral, mineral resource, mining, periodic, periodic system, polycrystalline, polysilicon, production, purity, raw, resource, science, semiconductor, shiny, si, silicon, solid, stone, very pure, white,