Rinnetite (in a glass for protection from degradation due to humidity) Locality: Nordhäuser Kaliwerke, Schacht I, Wolkramshausen , Thuringia, Germany Exposed in the Mineralogical Museum of University Bonn, Germany — Photo: Ra'ike · CC BY-SA 3.0
Rinneite
Rinneite is an IMA-recognized mineral species in the halide class, with the chemical formula K₃NaFe²⁺Cl₆.
It crystallizes in the hexagonal crystal system (space group R-3c). It is a member of the Rinneite structural group.
Key properties: Adamantine, commonly silky luster; optically uniaxial.
IMA symbol Rne, grandfathered status — known before the IMA’s founding, named in 1909.
Found as a secondary mineral in marine saline evaporite deposits; as a volcanic sublimate.
It is found associated with Halite, sylvite, kieserite, carnallite, langbeinite, an~ydrite.
The mineral was named to honor Friedrich Wilhelm Berthold Rinne (1863-1933), German crystallographer and petrographer, University of Kiel, Kiel, Germany. Type Material: n.d.