It is among the lightest known solids, with a density of about 2 kg/m3.. 
itopo elektroni hóró rẹ̀ ni elektroni meji alaninikeji ti wọn jókòó ona-àyípo oníhóró adibàjẹ́ meji.Ìtọ́kasí awọn elimẹ́ńtì kẹ́míkà àwọn Kalkojinawon aláìjẹ́-meta.. 