Swartzite
Swartzite is an IMA-recognized mineral species in the carbonate class, with the chemical formula CaMg(UO₂)(CO₃)₃·12H₂O.
It crystallizes in the monoclinic crystal system (space group P2_1/m).
Key properties: specific gravity 2.3; optically biaxial.
IMA symbol Swz, grandfathered status — known before the IMA’s founding, named in 1951.
Found as a secondary mineral in oxidized portions of a polymetallic sulfide deposit, the source of uranium undetermined.
It is found associated with Gypsum, schröckingerite, andersonite, bayleyite (Hillside mine, Arizona, USA).
The mineral was named to honor Charles K. Swartz (1861–1949), Professor of Geology and Mineralogy, Johns Hopkins University, Baltimore, Maryland, USA.
Index entry. This entry combines official IMA/RRUFF species data with published physical-property data — a full written entry hasn’t been published yet.
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