Lead Nitrate

Rory M Wilson ( "Rory )
Tue, 14 Oct 1997 10:38:47 GMT0BST

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Hi
I have been using lead nitrate as a calibrant in X-ray
powder diffraction experiments. I'm wondering if anyone has
any highly accurate modern values for its lattice parameter.
The value quoted in the older version of Int.Tables is
a=7.8404kX =7.8562A. Wycoff favours a=7.853A which
I think comes from Acta Cryst (1955) vol8, p840. The last
value I have comes from Acta Cryst (1957), vol10, p103
which despite being a neutron diffraction experiment
just gives 'a=7.84' which actually comes from an earlier paper.
Many thanks in advance
Rory Wilson

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