D4RR3N
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bismuth monoxide (how to make)
I have some Bismuth metal and would like to make a quantity of BiO (Bismuth Monoxide). What is the easiest method to prepare this, I want a few 100g
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not_important
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SFAIK there is no easy way to make "BiO", as bismuth takes the +3 and +5 oxidation states at STP. CVD reactions have been used to prepare films in
which a BiO phase appears to exist, this is neither a bulk form nor stable.
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UnintentionalChaos
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http://pubs.acs.org/doi/abs/10.1021/ja01444a008
Like with other metal oxalates heated to decomposition, it is pyrophoric in the form produced (extremely fine powder)
[Edited on 6-25-09 by UnintentionalChaos]
Department of Redundancy Department - Now with paperwork!
'In organic synthesis, we call decomposition products "crap", however this is not a IUPAC approved nomenclature.' -Nicodem
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JohnWW
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Any "BiO", if it exists, could only be a mixed oxide with the Bi in a mixture of the (I), (III), and/or (V) oxidation states, comparably to "red
lead", Pb3O4. I think that Tl also forms an oxide which is a mixture of its (I) and (III) oxidation states.
[Edited on 25-6-09 by JohnWW]
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woelen
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JohnWW, it could be a mixed oxidation state compound, but not in +3 and +5, because then you would have something near BiO2, but at least 1.5 O for
each Bi.
I can imagine that if "BiO" exists, then it is some non-stoichiometric compound like there is for so many metal oxides and sulfides and that it only
approximately can be written as BiO. I expect this then to be a solid solution of Bi in Bi2O3.
Well known examples of such compounds are e.g. nickel phosphide, which can be anything between Ni3P and NiP2.
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D4RR3N
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I seen BiO mentioned a few times during searches so just assumed it could be made in quantity.
Guess not 
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