Is vermiculite considered as sand?

As I understand it, soil has sand, silt and clay. You change the ratios based on what you want to grow, but any soil must have some of those 3.

Now if I added 100ml of vermiculite to 100ml of soil (which had a 1:1:1 ratio of sand silt clay) would the soil become more sandy? Cause vermiculite is somewhat sandy (it aerates and its large) but it’s somewhat clayish (its porosity holds moisture). So what is it? Does it exist outside of the soil/silt/clay spectrum?