Sharp metallic crystals of enneasartorite and hendekasartorite, two extremely rare new thallium minerals from the Lengenbach quarry (IMA 2015-074 and IMA 2015-075, respectively, both announced in February 2016 !) grown on realgar.  Both species have been analyzed by EDX (see analysis by Dr. Topa of the NHM Wien , ref. HG076).

Enneasartorite and hendekasartorite are two new members of the sartorite group minerals, also of recent creation.

Two extreme Lengenbach rarities in a single specimen!!.

For a discussion of these two new minerals (and also a third one) please see :

Topa,D.,Berlepsch,P.,Makovicky,E., Stroeger, B. and Stanley, C. (2015) Enneasartorite, IMA 2015-074,Hendekasartorite, IMA 2015-075. CNMNC Newsletter No. 28, December 2015, page 1861; Mineralogical Magazine, 79, 1859–1864.

and also the text of the original announcement below:

February 9, 2016 - The approval by the CNMNC of three new sulfosalts from Lengenbach has just been announced. The three new minerals  heptasartorite, enneasartorite and hendekasartorite are all - as their name says - members of a "subgroup' of the sartorite homologous series. In the course of systematic investigations Dr.Dan Topa (the main authour) has observed a systematic correlation between the amount of Tl in "sartorite" and the crystal structure. At a few critical values of Tl content the crystal structure tilts into a new one, leading to a new species. "Sartorite" is now the designation for a group of minerals. As it is the case for most of the prismatic, grey Lengenbach Pb sulfosalts a distinction between the new minerals is only possible with thorough analytical investigations.