In gold ores, the paragenses for the minerals and the chemical compositions of the ores are both extremely varied, as have been the temperatures and pressures during crystalization
. In general one can state that:
Because the properties of gray iron are greatly influenced by the thermal and chemical changes occurring from its molten stage to cooled casting, more nucleation sites and more heat of crystalization
limit undercooling and promote equilibrium, or slower, solidification.
Also called amorphous metals, these glasses possess unusual electronic and magnetic properties but are tough to make because the molten metal must cool very quickly to prevent crystalization
, says chemist Kenneth S.
"At some temperature, if crystalization
of a second component does not occur, the material between the ice crystals [in a frozen food product] becomes so viscous that it enters the glassy state," Reid explained.
The exothermic peak of HS crystalization
became larger with the presence of added clays in the nanocomposites.
These trends may indicate that magmatic evolution was controlled by a similar process such as fractional crystalization
, but that minerals involved in the process may have been different in the MBG and MPG.