Hey guys , i want to create this Hg2 Sb2 + S , i am pretty sure some or maybe most didnt hear or saw this thing ever , but its there so ?

its called black mercury , and lets escape warning part please i am a dentist so dont worry , well i have Hg liquid pure 99.99999 % , antimony , and finally Sulfur , i used a machine called amalgamator to to make the reaction , but nothing happen , so should i heat ? another question the antimony is a white powder i checked online its black , but the seller told me there is a black pigment to stain it , is that true ? thank you a lot <3 i wish anyone out there in the world could help me