The diatoms in diatomaceous earth have many different shapes, such as discs, needles, cylinders, feathers and so on. The bulk density is 0.3~0.5g/cm3, the Mohs hardness is 1~1.5 (diatom bone particles are 4.5~5mm), the porosity is 80~90%, and it can absorb water 1.5~4 times its own weight. ...
Read more