Calcioancylite-(Ce)
A valid IMA mineral species - grandfathered
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About Calcioancylite-(Ce)
Formula:
(Ce,Ca,Sr)CO3(OH,H2O)
Colour:
Colourless, white, pale pink, pink, grey
Lustre:
Vitreous, Greasy
Hardness:
4 - 4½
Crystal System:
Orthorhombic
Member of:
Name:
From the Greek αγκυλός ("ankylos") for "curved", in allusion to its usually rounded and distorted crystal shapes, and the prefix "CALCIO-" in allusion to its composition with CALCIum dominant over strontium, plus the "-(Ce)" suffix due to cerium being the dominant REE.
The calcium analogue of ancylite-(Ce).
The cerium analogue of calcioancylite-(Nd) and calcioancylite-(La).
Note: The precise type locality is unknown - the mineral was found at an unspecified place in "Western Lands" (Western Russia or possibly Finland) in a glacial erratic boulder of unknown source; for details and discussion see Pekov (1998).
The cerium analogue of calcioancylite-(Nd) and calcioancylite-(La).
Note: The precise type locality is unknown - the mineral was found at an unspecified place in "Western Lands" (Western Russia or possibly Finland) in a glacial erratic boulder of unknown source; for details and discussion see Pekov (1998).
Unique Identifiers
Mindat ID:
855
Long-form identifier:
mindat:1:1:855:8
Similar Names
| Calcioancylite | A synonym | |
| Calcioancylite-(La) | A valid IMA mineral species | (LaCa)(CO3)2(OH) · H2O |
| Calcioancylite-(Nd) | A valid IMA mineral species | Ca(Nd,La,Ce)(CO3)2(OH).H2O |
IMA Classification of Calcioancylite-(Ce)
Approved, 'Grandfathered' (first described prior to 1959)
IMA Formula:
(Ce3+,Ca,Sr)(CO3)(OH,H2O)
Classification of Calcioancylite-(Ce)
5.DC.05
5 : CARBONATES (NITRATES)
D : Carbonates with additional anions, with H2O
C : With large cations
5 : CARBONATES (NITRATES)
D : Carbonates with additional anions, with H2O
C : With large cations
16b.1.1.2
16b : HYDRATED CARBONATES CONTAINING HYDROXYL OR HALOGEN
1 : AmBn(XO3)pZqxH2O & with (m+n):p = 1:1
16b : HYDRATED CARBONATES CONTAINING HYDROXYL OR HALOGEN
1 : AmBn(XO3)pZq
11.8.13
11 : Carbonates
8 : Carbonates of the rare earths
11 : Carbonates
8 : Carbonates of the rare earths
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference for Standard |
|---|---|---|
| Canc-Ce | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Calcioancylite-(Ce)
Vitreous, Greasy
Transparency:
Translucent
Colour:
Colourless, white, pale pink, pink, grey
Hardness:
4 - 4½ on Mohs scale
Tenacity:
Brittle
Cleavage:
None Observed
Fracture:
Splintery
Optical Data of Calcioancylite-(Ce)
Type:
Biaxial (-)
RI values:
nα = 1.654 nβ = 1.733 nγ = 1.772
2V:
Measured: 60° to 70°, Calculated: 66°
Max. Birefringence:
δ = 0.118
Based on recorded range of RI values above.
Based on recorded range of RI values above.
Interference Colours:
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.
Surface Relief:
Very High (positive)
Relative to Canada balsam mounting medium (n ≈ 1.537).
Relative to Canada balsam mounting medium (n ≈ 1.537).
This shows the grain boundary and Becke line effect under plane-polarised
light, based on the contrast between this mineral's average refractive
index and the mounting medium. It does not take into account mineral
colouration.
In focus
Interference Figure:
This shows the idealized biaxial acute bisectrix (Bxa) interference figure
- the conoscopic view for a grain cut perpendicular to the acute bisectrix, using
this mineral's 2V. The two small white dots mark the melatopes - the points
where the two optic axes emerge - and are shown only when they fall within the
field of view. The coloured bands are isochromatics, and the dark bands are
isogyres.
Rotate the stage: at 0°/90° the isogyres form a cross through the melatopes; at 45° they pull apart into curved hyperbolas. That splitting on rotation - absent in a uniaxial figure - is the standard diagnostic test for telling biaxial minerals from uniaxial ones. If 2V is large, the melatopes may fall outside the field of view, as they often do at the microscope too.
Rotate the stage: at 0°/90° the isogyres form a cross through the melatopes; at 45° they pull apart into curved hyperbolas. That splitting on rotation - absent in a uniaxial figure - is the standard diagnostic test for telling biaxial minerals from uniaxial ones. If 2V is large, the melatopes may fall outside the field of view, as they often do at the microscope too.
Dispersion:
r < v
Chemistry of Calcioancylite-(Ce)
Mindat Formula:
(Ce,Ca,Sr)CO3(OH,H2O)
Element Weights:
Chemical Analysis
Oxide wt%:
| 1 | 2 | |
|---|---|---|
| CaO | 7.55 % | 6.38 % |
| SrO | 0.25 % | 1.96 % |
| La2O3 | 21.85 % | 14.34 % |
| Ce2O3 | 31.07 % | 29.67 % |
| Pr2O3 | 2.67 % | 0.24 % |
| Nd2O3 | 7.64 % | 9.64 % |
| Sm2O3 | 0.21 % | 0.65 % |
| F | 0.72 % | |
| -O=F2 | -0.30 % | |
| BaO | 0.85 % | |
| Total: | 71.66 % | 63.73 % |
Sample references:
Crystallography of Calcioancylite-(Ce)
Crystal System:
Orthorhombic
Class (H-M):
mmm(2/m2/m2/m) - Dipyramidal
Cell Parameters:
a = 5.0095(1) Å, b = 8.5006(1) Å, c = 7.2670(1) Å
Ratio:
a:b:c = 0.589 : 1 : 0.855
Unit Cell V:
309.46 ų
Comment:
Space group Pmcn (non-standard setting).
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 5.54 Å | (30) |
| 4.32 Å | (75) |
| 3.66 Å | (40) |
| 2.94 Å | (100) |
| 2.33 Å | (45) |
| 2.07 Å | (35) |
| 2.00 Å | (30) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 4b: Highly evolved igneous rocks | >3.0 |
| 35 : Ultra-alkali and agpaitic igneous rocks |
Synonyms of Calcioancylite-(Ce)
Calcioancylite (in part)
Other Language Names for Calcioancylite-(Ce)
Dutch:Calcioancyliet-(Ce)
German:Calcioankylit-(Ce)
Norwegian:Kalsiumankylitt
Russian:Кальциоанкилит-(Ce)
Relationship of Calcioancylite-(Ce) to other Species
Member of:
Other Members of Ancylite Group:
| Ancylite-(Ce) | CeSr(CO3)2(OH) · H2O | Orth. mmm(2/m2/m2/m) |
| Ancylite-(La) | LaSr(CO3)2(OH) · H2O | Orth. mmm(2/m2/m2/m) |
| Calcioancylite-(La) | (LaCa)(CO3)2(OH) · H2O | Orth. mmm(2/m2/m2/m) |
| Calcioancylite-(Nd) | Ca(Nd,La,Ce)(CO3)2(OH).H2O | Mon. m : Pm |
| Gysinite-(Ce) | PbCe(CO3)2(OH) · H2O | Orth. mmm(2/m2/m2/m) |
| Gysinite-(La) | PbLa(CO3)2(OH) · H2O | Orth. mmm(2/m2/m2/m) |
| Gysinite-(Nd) | PbNd(CO3)2(OH) · H2O | Orth. mmm(2/m2/m2/m) |
Forms a series with:
Common Associates
Associations Based on Photo Data:
| 18 photos of Calcioancylite-(Ce) associated with Calcite | CaCO3 |
| 18 photos of Calcioancylite-(Ce) associated with Perovskite | CaTiO3 |
| 11 photos of Calcioancylite-(Ce) associated with Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
| 9 photos of Calcioancylite-(Ce) associated with Titanite | CaTiO(SiO4) |
| 8 photos of Calcioancylite-(Ce) associated with Aegirine | NaFe3+Si2O6 |
| 5 photos of Calcioancylite-(Ce) associated with Microcline | K(AlSi3O8) |
| 4 photos of Calcioancylite-(Ce) associated with Fluorite | CaF2 |
| 4 photos of Calcioancylite-(Ce) associated with Micheelsenite | (Ca2Y)Al(PO3OH)(CO3)(OH)6 · 12H2O |
| 3 photos of Calcioancylite-(Ce) associated with 'Rémondite' | |
| 3 photos of Calcioancylite-(Ce) associated with Bastnäsite-(Ce) | Ce(CO3)F |
Related Minerals - Strunz-mindat Grouping
| 5.DC. | Gysinite-(Ce) | PbCe(CO3)2(OH) · H2O |
| 5.DC. | Calcioancylite-(La) | (LaCa)(CO3)2(OH) · H2O |
| 5.DC. | Gysinite-(La) | PbLa(CO3)2(OH) · H2O |
| 5.DC.05 | Kozoite-(La) | La(CO3)(OH) |
| 5.DC.05 | Calcioancylite-(Nd) | Ca(Nd,La,Ce)(CO3)2(OH).H2O |
| 5.DC.05 | 'Unnamed (Ce-analogue of Kozoite-(La) and -(Nd))' | (Ce,La)(CO3)(OH) |
| 5.DC.05 | Ancylite-(La) | LaSr(CO3)2(OH) · H2O |
| 5.DC.05 | Ancylite-(Ce) | CeSr(CO3)2(OH) · H2O |
| 5.DC.05 | Kozoite-(Nd) | Nd(CO3)(OH) |
| 5.DC.05 | Gysinite-(Nd) | PbNd(CO3)2(OH) · H2O |
| 5.DC.10 | Kamphaugite-(Y) | Ca(Y,REE)(CO3)2(OH) · H2O |
| 5.DC.15 | Sheldrickite | NaCa3(CO3)2F3 · H2O |
| 5.DC.20 | Thomasclarkite-(Y) | (Na,Ce)(Y,REE)(HCO3)(OH)3 · 4H2O |
| 5.DC.25 | Peterbaylissite | [Hg2]2+3[CO3]2(OH)2 · 4H2O |
| 5.DC.30 | Clearcreekite | [Hg2]2+3[CO3]2(OH)2 · 4H2O |
| 5.DC.35 | Niveolanite | NaBe(CO3)(OH) · 2H2O |
Other Information
Notes:
Readily soluble in acids.
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
Internet Links for Calcioancylite-(Ce)
mindat.org URL:
https://www.mindat.org/min-855.html
Please feel free to link to this page.
Please feel free to link to this page.
Search Engines:
External Links:
Mineral Dealers:
References for Calcioancylite-(Ce)
Reference List:
Nickel, Ernest H., Mandarino, Joseph A. (1987) Procedures involving the IMA Commission on New Minerals and Mineral Names and guidelines on mineral nomenclature. American Mineralogist, 72 (9-10) 1031-1042 (Appendix 2)
Pekov, I. V.; Petersen, O. V.; Voloshin, A. V. (1997) Calcio-ancylite-(Ce) from Ilímaussaq and Narssârssuk, Greenland, Kola peninsula and Polar Urals, Russia; ancylite-(Ce)-calcio-ancylite-(Ce) an isomorphous series. Neues Jahrbuch für Mineralogie - Abhandlungen, 171 (3). 309-322 doi:10.1127/njma/171/1997/309
Larsen, A.O.; Gault, R.A. (2002) Calcio-ancylite-(Ce) from syenite pegmatite at Tvedalen, Oslo Region, Norway. Neues Jahrbuch für Mineralogie - Monatshefte, 2002 (9). 411-423 doi:10.1127/0028-3649/2002/2002-0411
Belovitskaya, Yu. V.; Pekov, I. V.; Gobechiya, E. R.; Kabalov, Yu. K. (2013) Refinement of the crystal structure of calcioancylite-(Ce) by the Rietveld method. Crystallography Reports, 58 (2). 216-219 doi:10.1134/s1063774513020053(English translation of original publication in Kristallografiya (2013): 58 (2), 197-200)
Localities for Calcioancylite-(Ce)
Showing 64 localities.
symbol to view information about a locality.
The Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for references and further information on this occurrence.
? - Indicates mineral may be doubtful at this locality.
- Good crystals or important locality for species.
- World class for species or very significant.
(TL) - Type Locality for a valid mineral species.
(FRL) - First Recorded Locality for everything else (eg varieties).
All localities listed without proper references should be considered as questionable.
Angola | |
| Gonçalves +1 other reference |
Austria | |
| Mineralogical Society of America - ... |
| Walter F. (1983) | |
Belgium | |
| Van Der Meersche (2005) +2 other references |
Brazil | |
| Horváth |
| Horváth | |
Canada | |
| Hogarth (1997) |
| Reiner Mielke 2016 |
| Belovitskaya et al. (2013) +1 other reference |
China | |
| Wang et al. (2023) |
| Qu et al. (2025) |
Czech Republic | |
| GOLIÁŠ (2002) |
Finland | |
| Al-Ani et al. (2013) |
| Al Ani Thair and Torppa Akseli 2011. ... |
| Al-Ani Thair |
Germany | |
| Marko Burkhardt Collection |
| Mineralogical Society of America - ... |
Greenland | |
| Pekov et al. (1997) +1 other reference |
| Petersen (2001) | |
| Pekov et al. (1997) +1 other reference |
Hungary | |
| www.geomania.hu |
| www.geomania.hu +1 other reference | |
Italy | |
| Piccoli et al. (2007) |
| Grill (1935) |
| Orlandi (1999) +1 other reference | |
| Gamboni et al. (1997) |
| Identification with UK Id. Service of ... |
Namibia | |
| Uwe Kolitsch and Hans Vidar Ellingsen (SXRD + SEM-EDS) +2 other references |
Norway | |
| Husdal (2009) |
| Husdal (2009) | |
| Markus Aas Reime |
| Zhou et al. (2026) |
| Husdal (2023) | |
| Husdal (2008) |
| Husdal (2008) | |
| Husdal et al. (2017) |
| Husdal (2009) |
| Husdal (2009) |
| - (n.d.) |
| Husdal (2009) |
| Andresen (2011) |
| Larsen et al. (2010) |
| Berge (1993) +1 other reference | |
| Larsen et al. (2002) +1 other reference | |
| Peter Andresen collection | |
Romania | |
| Hirtopanu (2006) |
Russia | |
| Murzin et al. (2018) |
| Kasatkin et al. (2020) |
| Savel’eva et al. (2008) |
| Lemanski (n.d.) |
| Pekov et al. (1997) +2 other references |
| Belovitskaya et al. (2013) | |
| И.И. et al. (2023) |
| Pekov et al. (1997) +1 other reference |
| Palache et al. (1951) | |
| Pekov (1998) | |
Slovenia | |
| Hinterlechner-Ravnik et al. (1995) +1 other reference |
Spain | |
| Sainz de Baranda Graf et al. (2026) |
Tajikistan | |
| www.koeln.netsurf.de (1999) |
UK | |
| Hubbard et al. (2008) |
USA | |
| Chakhmouradian et al. (2002) |
| www.nysam.org |
| Nelen et al. (1987) |
| Mineralogical Society of America - ... |
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Guisachan Quarry, Tomich, North， West and Central Sutherland, Highland, Scotland, UK