What are the densities of ferrite, injection magnet, sintered NdFeB and bonded NdFeB?

The density of ferrite magnet is about 5.0g/m? And that of injection molded ferrite magnet is 3.8g/m? Respectively.
The density of sintered NdFeB magnet is about 7.5 g / cm3, and that of pressed bonded NdFeB magnet is about 6 g / cm3.
The density of SmCo magnet is about 8.4 g / cm3.
The density of magnet is different from the material formula of various magnet manufacturers. Generally, the higher the grade of magnet, the higher the density, that is, heavier.