Diatomaceous aiye jẹ iru biogenic siliceous sedimentary apata, nipataki kq atijọ diatomu ku.Ipilẹ kẹmika rẹ jẹ akọkọ SiO2, ti o ni iye kekere ti Al2O3, Fe2O3, CaO, MgO, K2O, Na2O, P2O5 ati ohun alumọni.Awọn lilo akọkọ ti diatomite jẹ awọn iranlọwọ àlẹmọ, awọn kikun, awọn adsorbents, awọn gbigbe katalytic, awọn ohun elo ile ore ayika ati bẹbẹ lọ.