Is VK short for something?

Is it a metal? A chemical? A liguid? A gas? A rock? A vapor? A dust like element?

Is there special ways to collect it? Carry it? Contain it?

I guess it would make sense if it was a Dust?

VK is Vrill Kulture. What is it? It is similiar in composition to the rare earth element Unobtanium 244. It can be used to create armor that is light weight ,able to withstand a large caliber artillery gun at close range ,It will power engines as long as they are installed in a chassis that uses legs instead of wheels or treads it can be used to create new compounds and chemicals as long as a blood or blood equivelent carrier is used,it is an enabler that allows human brains to be transplanted into ape bodies and allows apes to develop an almost human intellect. or from the description from the Dust game , Vrill Kulture, they came to understand, was not a civilization, but a massively powerful energy source. VK, which could be mined only at certain locations around the globe, was so rare and precious that the alien had braved interstellar travel to claim it.

By the time the locations of the VK deposits were discovered, and mining had begun, scientists had devised a multitude of ways to put it to use on the battlefield. The geographical distribution of the VK mines turned existing alliances and coalitions on their heads.

I like to go with the thought that any technology that is signifigantly advanced will appear as FREAKIN MAGIC to the poor illiterate minds of the earthlings.