Thought I might jump in here and provide some extremely accurate, well researched information.
First, you, along with some of the "debunkers" appear to be mixing up composition with chemistry. While on the surface, the terms appear to be synonymous, composition refers to relative weight percent of constituent elements. Chemistry, meanwhile, very specifically refers to bonding, orientation and chemical state as well as composition.
The images you've presented below contain compositional information only. Relative intensities in electron induced X-ray fluorescence are sensitive only to the number of atoms within the excitation area, not to their bonding state. Rutile, Brookite and Anatase will all appear the same in an SEM-EDS spectrum (since they're all TiO
2), but chemically, they are all distinctly different materials.
This is an important point because the test that would have provided chemical information about the aluminum was not actually performed. X-ray diffractograms for Al vs Al
2O
3 are very distinctly different. With a well controlled experiment, a quantitative mathematical process known as Rietveld refinement could determine the amount of elemental Al with respect to the amount of oxidized Al. So, the $50,000,000 question is: Why didn't Harrit et al perform this test? Why are they relying on compositional information to provide chemical bonding? Get back to me when you have an answer to that one.
known "thermate" spectrum (note the sulfur):
http://i389.photobucket.com/albums/oo332/subedei11/Slide160_PNG.jpg
As you can see, little carbon, lots of oxygen. This is "slag residue", so very little aluminum is present, it's solidified iron slag with a "crust", essentially.
Wikipedia states that Thermate contains 2% sulfur and 29% Barium Nitrate. You should see a barium L-alpha peak at about 4.5 keV, along with about 10 minor L lines. Why is that absent in your spectrum? Also, you do realize that the sulfur present in the image above would be trace-at-detection-limit at best, right? We're looking at a material that is, at best, a dozen counts above the Bremsstrahlung, right?
unreacted thermate from World Trade Center dust (note sulfur):
http://911research.wtc7.net/essays/thermite/docs/xeds_chips_s.png
As you can see, little carbon, lots of oxygen. This is unreacted so the aluminum is still present.
Help me out here, there are different levels of sulfur and aluminum in the two spectra above, and you want me to believe that they're the same material?
"kaolinite with gypsum" spectrum (note: sulfur comes from the sulfates in the gypsum)
http://i99.photobucket.com/albums/l281/lenbrazil/spectra.jpg
As you can see, lots of carbon, little oxygen, drastically different than thermite, thermite is not in paint chips. It's a near miss, but it's still a miss. Kaolinite is not the material in these red chips from the World Trade Center dust. Kaolinite doesn't explode and has a different chemical signature.
This is perhaps something you don't understand about X-ray microanalysis. You don't just compare the relative intensities and determine that they're different. If you want to compare the materials, you need to correct for morphology, composition (matrix effects), particle shape and size effects. Slapping up spectra collected by different people, using different instruments and detectors is no way to make a valid comparison.
Why would they use aluminothermic compounds as paint? it makes no sense.
Your question could be more accurately stated: Why would someone use kaolinite as part of an anti-corrosive paint applied to the WTC center steel during its construction? The answer to that question is contained in perhaps 75 years of steel corrosion protection research. Would you like me to point you to some references?
So it's proprietary, but you know what's in it. Make up your mind. Why would a "talc pigment" be used on steel? I don't follow this at all. You're saying that the steel in the World Trade Center was colored with some kind of "talc pigment"? I'm lost.
Had you read the NCSTAR, you would have noted that NIST did numerous tests on the anti-corrosion paint. The composition and thermal properties are listed in the report. Would you like me to provide you the reference?