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Carbonate

Calcioancylite-(Ce)

(Ce,Ca,Sr)(CO₃)(OH,H₂O)
Hardness4–4.5
Crystal systemOrthorhombic
ClassCarbonate
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Calcioancylite-(Ce) specimen

Calcioancylite-(Ce) Locality: Poudrette quarry (Demix quarry; Uni-Mix quarry; Desourdy quarry), Mont Saint-Hilaire , Rouville RCM, Montérégie , Québec , Canada ( Locality at mindat.org ) Field of view 3 mm. Depth of field is achieved with CombineZM. Specimen and photo Leon Hupperichs. — Photo: Leon Hupperichs · CC BY-SA 3.0

Calcioancylite-(Ce)

Calcioancylite-(Ce) is an IMA-recognized mineral species in the carbonate class, with the chemical formula (Ce,Ca,Sr)(CO₃)(OH,H₂O).

It crystallizes in the orthorhombic crystal system (space group Pmmm). It is a member of the Ancylite structural group.

Key properties: Mohs hardness 4–4.5; specific gravity 3.95; White streak; Vitreous, greasy on fractures luster; optically biaxial.

IMA symbol Canc-Ce, IMA status: approved, named in 1922.

A rare mineral, found in late-stage miaroles in granite (Baveno, Italy); in Alpine-cleft type fissures (Cornog, Pennsylvania, USA; Polar Ural Mountains, Russia); in alkaline igneous rocks (Mont Saint-Hilaire, Canada; Ilı́maussaq intrusion.

It is found associated with Potassic feldspar, natrolite, aegirine, catapleiite, perovskite, astrophyllite, titanite, apatite, anatase, synchysite, quartz, calcite, actinolite.

The name refers to its calcium content and from the Greek for curved in allusion to the typical rounded and distorted crystal habit; and for the dominant rare earth element, cerium.

Index entry. This entry combines official IMA/RRUFF species data with published physical-property data — a full written entry hasn’t been published yet. Browse more C minerals or help write this entry.