Unfortunately, there is no substance called Hg2Cu2. There seems to have been a mistake in writing the chemical formula. Please provide accurate information so we can study and explain about that chemical substance.
However, we can learn about the chemical elements in this formula, which are Hg (Mercury) and Cu (Copper).
Hg, also known as Mercury, is a chemical element with the symbol Hg and atomic number 80. It is a heavy, silvery white metal and is one of the few chemical elements that are liquid at room temperature.
Cu, also known as Copper, is a chemical element with the symbol Cu and atomic number 29. It is a red-brown metal, with good electrical and thermal conductivity.
Both of these elements play important roles in many chemical and biological processes, as well as in many industrial applications.