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Mineralpedia Details for Calkinsite-(Ce)

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Calkinsite-(Ce)

Calkinsite-(Ce)

Formula
Ce2(CO3)3ยท4H2
Crystal System
Orthorhombic 
Cleavage
Perfect, Distinct, None 
Color
light yellow 
Class
Orthorhombic - Disphenoidal 
Hardness
2.5 
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Calkinsite-(Ce) from Big Sandy Creek, Bearpaw Mts., Hill Co., Montana, United States

Calkinsite-(Ce)
            from Big Sandy Creek, Bearpaw Mts., Hill Co., Montana, United States
Special Info
Type Locality

Very rich coverage of tiny light mustard-yellow microcrystals composed of micro-platy Calkinsite-Ce that is possibly associated with microcrystalline Lanthanite, which are visually indistinguishable at this micro scale.

The REE carbonates at the Vermiculite deposits at Big Sandy Creek include Burbankite (TL), Ancylite, Lanthanite, and Calkinsite-Ce (TL), and according to Pecora & Kerr's American Mineralogist article (1953) the Lanthanite and Calkinsite-Ce are the decomposition products of Burbankite.

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