Name | MANGANESE SILICIDE |
Synonyms | MANGANESE SILICIDE Manganese disilicon manganese disilicide Manganese Silicide Powder bis(λ2-silanylidene)manganese |
CAS | 12032-86-9 |
EINECS | 234-781-6 |
Molecular Formula | MnSi2 |
Molar Mass | 111.11 |
Density | 5.240 |
EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
production method | 2G (0.036mol) Manganese, 2G (0.071mol) silicon and 10g(0.16mol) the copper was placed in small blocks in a 10mL Al2O3 crucible in a quartz ampoule with an open end. After Evacuation and sealing, the ampoules were placed in a high-temperature oven with a carbon-silicon rod. Within 12h, the temperature was raised to 1200 C, and then cooled to 500 C at a rate of 10 C/h. The ampoule is removed, cooled, and then inserted into a piece of rubber tube of thicker diameter, and the ampoule is broken so that the metal ingot can be safely removed. When the copper-rich Cu-Mn-Si base block was dissolved in 8mol/L nitric acid, the octahedral crystals remained. These crystals were washed with water and dried to obtain MnSi2 crystals with edges up to 2mm. Several octahedral crystals were ground into a powder and studied using the Guinier Hagg technique (Cu Ray). All diffraction lines can be cataloged according to the cubic unit cell, α =(4.560±0.001)A · (1A · = 0.1nm, the same below) this value in the past reported MnSi2 lattice distance (4.558±0.001) within the allowable experimental error range. Since the finely divided crystals and the past articles have very similar lattice constants, it is shown that manganese is largely not replaced by copper. This result was confirmed by the emission spectral analysis of the crystal, indicating that the upper limit of the copper content is about 1%. |