Nickenicher Sattel (Eicher Sattel), Nickenich, Andernach, Mayen-Koblenz, Rhineland-Palatinate, Germany

AB₂C₅T₈O₂₂W₂

A = Na, K, Ca, Pb2+
B= Li, Na, Mg, Fe2+, Mn2+, Ca
C = Li, Na, Mg, Fe2+, Mn2+, Zn, Co, Ni, Al, Fe3+, Cr3+, Mn3+, V3+, Ti, Zr
T = Si,Al
W = (OH), O, F.

A widespread and complex group of minerals presently divided into a group/subgroup/root-name hierarchy (see group/subgroup/root-name files for the individual species). The crystal symmetry is either monoclinic (more common) or orthorhombic.

www.mindat.org
Smorf link

Samples:

	9D.8 Amphibole Euhedral prismatic black crystals #inosilicates
	9D.9 Amphibole Black prismatic subhedral crystals with garnet #inosilicates