I’m sorry, but it seems there has been a misunderstanding. Hg3Co2 is not a known chemical compound. Hg is the chemical symbol for mercury, and Co is the symbol for Cobalt. However, there is no known compound with the formula Hg3Co2.
Perhaps you are trying to learn about a different compound? Please ensure that you have inputted the correct chemical formula. You might also want to consider checking in a chemistry textbook or a chemistry-focused website to determine the exact formula you are looking for.
If you need information on another specific chemical compound, let me know and I’d be more than happy to assist.