Galgenbergite-(Ce)
Galgenbergite-(Ce) is an IMA-recognized mineral species in the carbonate class, with the chemical formula CaCe₂(CO₃)₄·H₂O.
It crystallizes in the triclinic crystal system (space group P-1).
Key properties: specific gravity 3.99; White streak; Vitreous luster; optically biaxial.
IMA symbol Ggb-Ce, IMA status: approved, named in 1997.
Found in small fissures cutting an albite–chlorite schist.
It is found associated with Calcite, siderite, ancylite-(Ce), pyrite, kaolinite, albite, chlorite.
The name is derived from the locality, the Galgenberg railroad tunnel, that produced the first specimens and suffix for the dominant rare earth element, Cesium.
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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