Vanadoandrosite-(Ce)
Vanadoandrosite-(Ce) is an IMA-recognized mineral species in the silicate class, with the chemical formula MnCe(V³⁺AlMn²⁺)[Si₂O₇][SiO₄]O(OH).
It crystallizes in the monoclinic crystal system (space group P2_1/m). It is a member of the Epidote, allanite structural group.
Key properties: specific gravity 4.27; Brown streak; Vitreous to adamantine luster.
IMA symbol Vda-Ce, IMA status: approved, named in 2004.
Found in quartz-rhodochrosite-sulfide veins cross-cutting massive rhodochrosite ore, as well as in the ore itself, in quartz grains rimmed by chalcopyrite.
It is found associated with Quartz, vuorelainenite, rhodochrosite, chalcopyrite, vanadian spessartine, friedelite.
An epidote-group mineral in which Ce3+ is dominant in A2, Mn2+ in A1, V3+ in M1, Al in M2, and in which Mn2+ is the dominant charge-compensating (i.e. divalent) cation in M3.