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Improving Mindat.orgnealite-(H2O)

22nd Apr 2006 18:59 UTCJim Ferraiolo

This is not a valid mineral name or even a synonym. Well, it should now be made a synonym of nealite, especially since I've seen it on webmineral and Wikipedia with no mention of it being the same as nealite. I assume it's been entered as a new name because of the crystal structure determinations done in 1993.


Nealite was originally described as an anhydrous arsenate Pb4Fe(AsO4)2Cl4 by Dunn & Rouse ("Nealite: a new mineral from Laurion Greece").


In 1993, Guiseppetti, et al., NJMM 1993(6),278-288("The crystal structure of nealite") determined nealite was actually a hydrated arsenite, Pb4Fe(AsO3)2Cl4.2H2O. The unit cell determined was not appreciably different from Dunn & Rouse's determination.


Also in 1993,Pertlik & Schnorrer published "A re-appraisal of the chemical formula of nealite,Pb4Fe(AsO3)2Cl4.2H2O, on the basis of a crystal structure determination", Mineralogy & Petrology 48, 193-200(1993).

25th Apr 2006 08:35 UTCUwe Kolitsch Manager

Thanks, Jim. Have corrected the formula and added the refs.

I tried to transform "nealite-(H2O)" into a synonym for nealite, but it didn't work.

25th Apr 2006 08:37 UTCUwe Kolitsch Manager

Now it worked.
 
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