Ubucucike bw'icyuma ni 7,7 g / cm³.Iyo ibyuma bidafite ingese bikoreshwa mubikorwa bitandukanye mubikorwa bitandukanye, bigabanya igihe cyo gutanga cyafashwe nibice bikozwe mubyuma.Ibi ni ukubera ko, nkigisubizo cyo gukoresha ibyuma bitagira umwanda, nta mpamvu yo kurangiza gukorwa.Ibyuma bitagira umuyonga bifite ihindagurika ryinshi nigipimo kinini cyo gukomera.Ibyuma bitagira umuyonga bifite imbaraga zishyushye kandi zikomeye za cryogenic.Ibyuma bitagira umwanda biraboneka mu byiciro birenga 150, ariko amanota 15 yonyine niyo akoreshwa muri rusange.Ikintu gikomeye rwose mubyuma bidafite ingese nuko isubirwamo 100%.