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|System:||Orthorhombic||Hardness:||4 - 4½|
|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).
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).
Classification of Calcioancylite-(Ce)
|Explanation of status:||Type locality unknown, probably western Russia or Baltic country|
|Nickel-Strunz 10th (pending) edition ID:||5.DC.05|
5 : CARBONATES (NITRATES)
D : Carbonates with additional anions, with H2O
C : With large cations
|Dana 8th edition ID:||16b.1.1.2|
16b : HYDRATED CARBONATES CONTAINING HYDROXYL OR HALOGEN
1 : AmBn(XO3)pZq
|Hey's CIM Ref.:||11.8.13|
11 : Carbonates
8 : Carbonates of the rare earths
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Physical Properties of Calcioancylite-(Ce)
|Hardness (Mohs):||4 - 4½|
Crystallography of Calcioancylite-(Ce)
|Class (H-M):||mmm (2/m 2/m 2/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 Volume:||V 309.46 Å³|
|Comment:||Space group Pmcn (non-standard setting).|
|X-Ray Powder Diffraction:|
Optical Data of Calcioancylite-(Ce)
|RI values:||nα = 1.654 nβ = 1.733 nγ = 1.772|
|2V:||Measured: 60° to 70°, Calculated: 66°|
|Maximum Birefringence:||δ = 0.118|
Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
|Dispersion:||r < v|
Chemical Properties of Calcioancylite-(Ce)
|Simplified for copy/paste:||(Ca,Sr)Ce(CO3)2(OH)·H2O|
|Essential elements:||C, Ca, Ce, H, O|
|All elements listed in formula:||C, Ca, Ce, H, O, Sr|
Relationship of Calcioancylite-(Ce) to other Species
|Member of:||Ancylite Group|
|Other Members of Group:|
|Related Minerals - Nickel-Strunz Grouping):|
|Related Minerals - Hey's Index Grouping:|
Other Names for Calcioancylite-(Ce)
|Other Information:||Readily soluble in acids.|
|Health Warning:||No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.|
References for Calcioancylite-(Ce)
Tschernik (1904) Verh. min. Ges. St. Petresburg: 41: 43 (as Eisenkalkankylit, Mangankalkankylit).
Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: Halides, Nitrates, Borates, Carbonates, Sulfates, Phosphates, Arsenates, Tungstates, Molybdates, Etc. John Wiley and Sons, Inc., New York, 7th edition, revised and enlarged: 291-293.
Mineralogical Record (1987): 18: 203.
American Mineralogist (1987): 72: 1031 (Appendix 2).
Neues Jahrbuch für Mineralogie, Abhandlungen (1997): 171(3): 309-322.
Pekov, I. V. (1998): Minerals first discovered on the territory of the former Soviet Union. Ocean Pictures Ltd., Moscow, 369 pp.
Neues Jahrbuch für Mineralogie, Monatshefte (2002), 411.
Zapiski Imperatorskogo Mineralogicheskogo Obshchestva: 71: 43-54.
Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
Belovitskaya, Yu. V., I.V.Pekov, E.R. Gobechiya, and Yu. K. Kabalov (2013): Refinement of the Crystal Structure of Calcioancylite-(Ce) by the Rietveld Method. Crystallography Reports (2013): 56(2),216-219. English translation of original publication in Kristallografiya (2013):58(2),197-200.
Internet Links for Calcioancylite-(Ce)
Localities for Calcioancylite-(Ce)
The map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
(TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.