Beryllium is the first of metals in Mendeleev periodic system, derived by reduction at the stage of low temperatures. The granules dimensioned interval is optimized in analytical research of beryllium fluoride reduction regularities. The maximum dimension for beryllium fluoride is 24 mm, minimum is not less than 1 mm. The optimal value of parameter is in mean value depreciation area (10-18 mm). The maximum dimension for magnesium is 24 mm and corresponds to 1 mol.
