It could be a mixture of lead and aluminum.<quoted text>Yawn, Who was that mentally ill woman you called a CIA asset?
Who were the 20 pilots you said could not steer into the WTC?
The color means nothing. The color can be misleading, and because it can be misleading, it means nothing as evidence. This is not aluminum in a foundry which hasn't mixed with anything. This is a cocktail of whatever was on the plane and in the towers which happens to come together. It wouldn't be unreasonable to suspect Aluminum and some other properties has changed its color.
You're quite correct though, given the conditions there's a more than reasonable reason the speculate that the material was a combination of metal and other substances.