Rapporto R J Lee LINK
Pg 3 [PDF pg 7]
These dust and heat-processed constituents are not typically found
associated with typical office building environments."
Pg 5 [PDF pg 9]
Particles of materials that had been modified by exposure to high
temperature, such as spherical particles of iron and silicates, are common in WTC Dust because of the fire that accompanied the WTC Event, but are not common in “normal” interior office dust.
Pg 17 [PDF pg 21]
Various metals (most notably iron and lead) were melted during the WTC7 Event, producing spherical metallic particles. Exposure of phases to high heat results in the formation of spherical particles due to surface tension.
Figure 21 and Figure 22 show a spherical iron particle resulting from the melting of iron (or steel)*.
Pg 21 [PDF pg 25]
Many of the materials, such as lead, cadmium, mercury and various organic compounds, Vaporized** and then condensed during the WTC Event.
The presence of lead oxides on the surface of mineral wool indicates the exposure of high temperatures at which lead would have undergone vaporization, oxidation, and condensation on the surface of mineral wool.\
The thinning of the steel occurred by a high-temperature corrosion due to a combination of oxidation and sulfidation.
Heating of the steel into a hot corrosive environment approaching 1,000°C (1,800°F) results in the formation of a eutectic mixture of iron, oxygen, and sulfur that liquefied the steel.
The sulfidation attack of the steel grain boundaries accelerated the corrosion and erosion of the steel.
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