Crowd sourcing metals information

I\’ve been having a quick look around Google and it doesn\’t seem that anyone has already prepared this information. What I\’d like to be told is that I\’m wrong, and that someone has prepared this information. And, err, where that prepared information is…..

What I\’m looking for is information about the rare earth metals. Sc, Y and then the lanthanides, La to Lu (21, 39 and 57 to 71).

But the information I want is about the halides of these metals. The chloride, iodide and fluoride (maybe the bromide as well).

And the information I want is, what is the boiling point of each of these halides of each of the metals?

The reason? Some metals are separated from their ores by being converted to the chloride, turning the chloride into a gas by heating and then doing clever stuff to that mixture of metal chlorides to extract the one you want. (Titanium for example.) It\’s not hugely different in concept from distillation to get different alcohols, or different fractions of crude oil.

I\’ve seen it mentioned that this could be used as a way to separate the rare earths (which are very difficult to separate by the usual chemical means because they are so similar chemically).

What I\’d like is a bit more basic information, as above, so I can mull over whether this is entirely barking mad or whether there\’s something there.

So, anyone got Great Google Ju Ju?

8 comments on “Crowd sourcing metals information

  1. I think a lot of them decompose rather than boil – hence the lack of data (that anthology has mp but not bp). Don’t know of a collected dataset, I’m afraid.
    Eg. Thermodynamics of lanthanide halides and application to high-temperature processes, 2005, Marcelle Gaune-Escard, Scandanavian Journal of Metallurgy:
    Europium salt, bp (degC)
    (II) F, 2480
    Cl 2000
    Br 1880
    I 1580
    (III) F 2280
    Cl decomposes
    Br decomposes
    I decomposes

  2. Have you tried Wolfram|Alpha? I did a quick look, and didn’t find anything, but the set of keywords I’d use is probably a lot more limited than yours.

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