Rabbittite , Schröckingerite Field of view: 3.5 mm Fundort: Uranus Mine, Kleinrückerswalde, Annaberg-Buchholz, Erzgebirgskreis, Saxony, Germany Description: Rabbittite with high F content and tabular green schröckingerite — Photo: Joy Desor · CC BY-SA 3.0 de
Rabbittite
Rabbittite is an IMA-recognized mineral species in the carbonate class, with the chemical formula Ca₃Mg₃(UO₂)₂(CO₃)₆(OH)₄·18H₂O.
It crystallizes in the monoclinic crystal system.
Key properties: Mohs hardness 2.5; specific gravity 2.57; Silky luster; optically biaxial.
IMA symbol Rab, grandfathered status — known before the IMA’s founding, named in 1955.
A rare secondary mineral, which may be of post-mine origin.
It is found associated with Sodium-zippeite, magnesium-zippeite, fourmarierite, gypsum, bieberite, cobaltocalcite.
The mineral was named to honor John Charles Rabbitt (1907–1957), Chief, Trace Elements Section, U.S. Geological Survey.