Gaspeite [SEP] named after
Gaspéite
Gaspéite, a very rare nickel carbonate mineral, with the formula (Ni,Fe,Mg)CO, is named for the place it was first described, in the Gaspé Peninsula, Québec, Canada. 
Gaspéite is the nickel rich member of the calcite group. A solid solution series exists between all members of this group with divalent cations readily exchanged within the common crystal structure. It forms massive to reniform pappillary aggregates in fractures, bottryoidal concretions in laterite or fracture infill. It is also present as stains and patinas
containing 40-80% sulfide, and disseminated sulfide. Accessory nickeline and gersdorffite are reported. The transition zone supergene sulfide phases include; violarite, smythite, covellite, chalcocite and marcasite after pyrite. 
The nickel sulfides within the regolith have been oxidised into a complex series of weathering fronts including a rare expression of a carbonate front which has resulted in a host of unusual nickel carbonate, arsenate and silicate minerals such as gaspeite, atacamite, annabergite, carrboydite, glaucospaerite, hydrohonessite, kambaldaite, népouite, nullaginite, pecoraite,