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Identity HelpSusannite or Leadhillite???? or neither :-)

29th Mar 2009 16:29 UTCMaurice de Graaf Expert

Hi list,


While trying to sort out a box of old micromounts, collected in the 1980s (not by me) I came across a specimen labeled Cerussite and Pyromorfite from Willnauergang, Schauinsland, Black Forest, Germany. The cerussite is crude, but OK, the pyro is pale green and with a lot of luck even a crystal is in there.... But what caught my eye were two very small and very thin hexagonal tabular crystals.


I see on http://www.mindat.org/loc.php?loc=32138 that two possibilities could be Susannite and Leadhillite. Can anyone tell me something about how to tell them apart. And does anyone have more info about the two from this locality?


The crystals are about 0.08mm across. Milky white and no pearly (or other) luster.


Thanks in advance!

Maurice

29th Mar 2009 16:51 UTCKnut Eldjarn 🌟 Manager

Maurice,


I do not think it is possible visually to distinguish between leadhillite and susannite. Based on the picture alone, I would not be convinced that any of them is present. It may be something more common.

Knut

29th Mar 2009 16:57 UTCUwe Kolitsch Manager

Tabular susannite and leadhillite can only be distinguished analytically.

29th Mar 2009 16:58 UTCSebastian Möller Expert

Hello,


Impossible to distinguish from a photo. But, in general, specimen from the Black Forest tend to be rather susannite than leadhillite. Only from Clara Mine leadhillite is as common as susannite. The one specimen I have from the Schauinsland is labeled Susannite, but this one has a waxy to glassy luster.


Regards,

Sebastian Möller
 
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