One of the „crucial“ problems with WTC nanotruthers is that they are not capable/are not willing to accept that Jim Millette really proved solely
kaolinite (kaolin)as a source of Si and Al signals in the chips corresponding to Bentham chips (a) to (d) (and hence, these chips cannot be
thermite of any kind). As for me, I still rely on the Millette’s long experience with forensic analyses of such materials, but it is perhaps good to have some closer look.
So, why is Millette sure that those stacking platelets, with the typical morphology of kaolinite, are really
kaolinite?
1) Although it is not explicitly commented by Millette, these platelets
(analyzed in the pristine red layers, as well as in layers after two different ashing procedures) have the XEDS signatures matching very well the signatures of kaolinite, see e.g. p. 19....
...Fig. 11 in Bentham paper (upper spectrum):
and finally McCrone Particle Atlas:
2) FTIR of the red layer is in a very good agreement with the FTIR of
kaolinite, namely bands at 3619 and 3690 cm
-1 perfectly coincide:
Here is for comparison FTIR of kaolinite from McCrone Atlas:
On the other hand, FTIR of nanoaluminum should show strong, broad bands at ca 3050-3300 cm
-1, belonging to aluminum oxide (alumina), since the substantial portion of alleged aluminum in such thin platelets must be inevitably oxidized; see e.g. McCrone Atlas:
So far… “alles klar” (dear Oystein

). But, the next and perhaps the key proofs of kaolinite in Millette’s report are SAED patterns, i.e. patterns from Selected area (electron) diffraction. Such a pattern is e.g. here:
Frankly, crystallography has been always a „hard stuff“ to me, so I’m rather lost here
What I can say anyway?
Fortunately, kaolinite, metallic aluminum and alumina are crystalline materials, therefore they should show distinct SAED patterns. Kaolinite has triclinic crystals, aluminum has cubic crystals and alumina has trigonal crystals (see Wiki), with the different spacing between atoms, therefore (I think) they should show different SAED patterns.
Jim Millette wrote:
„The SAED pattern of the kaolin particles (Figure 19) matched the kaolin pattern shown in the McCrone Particle Atlas 8 (Appendix E).The values for the d-spacings determined for the diffraction patterns matched those produced by reference kaolin samples.“ Sadly, this reference SAED pattern of kaolinite is not available in online version of McCrone Atlas. And, I am not able to compare Millette’s patterns with other kaolinite patterns published, since I simply do not understand this stuff (so far

).
Is here any volunteer educated in crystallography, who can elucidate this SAED stuff?
(I basically do not care what truthers think, I just like to understand Millette’s report better
)