Xls to < 2 mm. Via Arnaldo Brunetti (ex Jean-Pierre Beckerich). MOB coll This is a remarkably rich specimen for the species. I thank Arnaldo for parting with it! The matrix is analcime covered by tiny catapleiite xls. Modified by CombineZP. From: Poudrette quarry, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada — Photo: Modris Baum · CC0
Bussyite-(Ce)
Bussyite-(Ce) is an IMA-recognized mineral species in the silicate class, with the chemical formula (Ce,REE)₃(Na,H₂O)₆MnSi₉Be₅(O,OH)₃₀F₄.
It crystallizes in the monoclinic crystal system (space group C2/c). It is a member of the Bussyite structural group.
Key properties: Mohs hardness 4; specific gravity 3; White streak; Vitreous luster; optically biaxial.
IMA symbol Bsy-Ce, IMA status: approved, named in 2007.
A late-stage hydrothermal mineral in association with a nepheline syenite-hosted pegmatite.
It is found associated with Serandite, aegirine, albite, analcime, ancylite-(Ce), calcite, catapleiite, gonnardite, kupletskite, leucophanite, microcline, nenadkevichite, polylithionite.
The mineral was named to honor Antoine Alexandre Brutus Bussy (1794-1882), co-discoverer of beryllium.