Bridgesite-(Ce)
Bridgesite-(Ce) is an IMA-recognized mineral species in the sulfate class, with the chemical formula CaCe₂Cu₆(SO₄)₄(OH)₁₂·8H₂O.
It crystallizes in the monoclinic crystal system (space group C2/m).
Key properties: specific gravity 2.847; Pale blue streak; optically biaxial.
IMA symbol Bdg-Ce, IMA status: approved, named in 2019.
Secondary, the product of water percolating through sulfide-bearing orebodies and dripping onto waste limestone in a humid mine environment.
It is found associated with Brochantite, malachite, serpierite, devilline, gypsum, aragonite, jarosite, pyrite, lanthanite-(Ce), undifferentiated iron oxyhydroxides.
The mineral was named to honor Trevor Bridges (1935-2015), chemist, amateur geologist, mineral collector, mountaineer, munroist, founding member of the Russell Society’s northern branch in 1984.