Originally Posted by Vartha
OKAY I found a screw up in the story. ERIK says to Hawkeye that he DID NOT know he needed Iridium to stablize the cube, YET later Tony says his notes did!
Maybe... to be fair to Tony, Hill doesn't ask him about when he became an expert in thermonuclear astrophysics until kind of well after he mentions what the Iridium could be used for -- instead she asks it after he talks about a high energy density power source to kick start the cube.
Given Stark's knowledge, it wouldn't surprise me if there wasn't anything in Selvig's notes regarding the Iridium but, after knowing the Iridium had been taken, was simply able to deduce/put 2+2 together.
Just my personal theory, however. If that makes sense.