What is si4 compound name?

As an AI language model, I don't see any specific compound name as "si4". "Si" refers to the chemical element silicon, which has an atomic number of 14. Silicon is a metalloid with a silvery-gray appearance and is widely used in semiconductors, solar cells, and other electronic devices.

If you have any additional specific information or details about "si4", please provide them and I will be happy to assist you with your query.