Unfortunately, it seems there has been a misunderstanding in the information you provided. Si4O is not a valid chemical formula based on the elements Silicon (Si) and Oxygen (O) in the periodic table. Typically, Silicon and Oxygen combine to form compounds such as SiO2 (Silicon Dioxide), SiO (Silicon Monoxide).
If you are interested in Silicon Dioxide SiO2, it is an important compound found abundantly in nature such as in sand, rock, or glass. It can be amorphous or crystalline, colorless, odorless, and insoluble in water. Silicon Dioxide also has the ability to withstand high temperatures and is widely used in many industries.
The chemical properties of SiO2 include the ability to react with strong acids to form silicate compounds, as well as react with alkali metals to produce silicates and hydrogen.
We apologize for the confusion and hope that the above information may be helpful to you.