The first is from Shallan's Sketchbook and is called The Atrium. The second is from Navani's Notebook and is called The Fourth Bridge. The third is also from Navani's Notebook and is called The Arnist Method.
Refining would be required to remove the "impurity" of the alloyed metal, giving you a "purified atium" (patium? p-atium? atium prime? atrium?) that could be used as a Hemalurgic wildcard. This would also have implications on the last Wax and Wayne title - the Lost Metal being this purified atium.
On 5/26/2013 at 12:45 PM, Phantom Monstrosity said: Atium used to be called 'atrium' as well, too. Fear the Mistborn burning Atrium! For he wields the awesome power of enabling public assembly in a well lit indoor space! Edited by Kurkistan 5
As long as I'm an atrium or steel misting, I can deal with this. It is a step back from god hood however.