Budewar sieve kwayoyin 5A kusan 5 angstroms ne, wanda kuma ake kira sieve kwayoyin calcium.Ana iya amfani da shi a cikin na'urorin adsorption na matsa lamba na yin iskar oxygen da masana'antu na hydrogen.
Ka'idar aiki na sieves na kwayoyin suna da alaƙa da girman pore na sieves, wSuna iya ƙaddamar da ƙwayoyin iskar gas waɗanda diamita na ƙwayoyin cuta ya yi ƙasa da girman pore.Girman girman girman pore, mafi girman ƙarfin talla.Girman pore ya bambanta, kuma abubuwan da aka tace da kuma raba su ma daban-daban. Lokacin da aka yi amfani da shi azaman desiccant, simintin kwayoyin zai iya sha har zuwa 22% na nauyinsa a cikin danshi.