Bhoopesh, I would trust the XAFS.org spectrum more than mine, I'm sure that the APS has a better resolution etc. I'm aware that there are other forms of reduced iron carbide, but I did nothing special except for following the Li et al. paper. I then tried to see if the spectrum was similar to both the one on Dr. Newville's database as well as the Iglesia and coworkers' papers, and they were. I know this data is a bit glitchy... and I was pretty much only interested in the XANES. If the person that Dr. Newville is referring to made the Fe3C from the iron melt it would have been a white powder, so they likely did a similar procedure as reducing the Fe2O3 std. to a sufficient temperature (at 1 atm). I have also heard from a former Exxon researcher that when they wanted to make cementite they simply CO reduced Fe2O3 to a sufficient temperature as well. I'm forwarding this directly to your e-mail as well. Hope this helps, if not (try and comparing it with the one on the XAFS.org, I remember when I checked it was similar). Andrew Campos