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>>> > Ca3(PO4)2+2H2SO4 == Ca(H2PO4)2+2CaSO4
>>> > Ca(H2PO4)2 == Ca(PO3)2+2H2O
>>> > 3Ca(PO3)2+10C == Ca3(PO4)2+4P+10CO

>>This sounds a lot like a historical recreation of the synthesis of
>>phosphorus.  Concentrated horse urine was used as the phosphate source
>>and I think, charcoal the carbon.

>*Horse* urine??!!!  Doubtless you refer to Brandt's original prep?  I
>had always assumed that he used his own.

>As a youngster (and ignorantster) I once tried making phosphorus by a
>fanciful perversion of the Brandt method: boiling pee in a coffee can.
>I would discourage anyone from repeating the experience.  It smells
>really horrid, especially after the water is gone and the residue
>begins to char.

LOL :) ... Thanks - I needed that :)


Oook !
NOTE remove the not_ from the address to reply. NO SPAM !

Fri, 30 Dec 2005 06:25:59 GMT
Sounds like an attempt to make calcium phosphide.
Calcium phosphide in contact with water produces a crude phosphine gas
which is spontaneously inflamable.
It used to be the basis for emergency rescue markers at sea.
About 100 years ago they were apparently quite common.

Bob M

Sat, 31 Dec 2005 01:03:18 GMT
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