Ancylite-(La)
A valid IMA mineral species
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About Ancylite-(La)
Formula:
LaSr(CO3)2(OH) · H2O
Colour:
Colorless, pale yellowish gray, yellowish brown, yellow
Lustre:
Vitreous
Hardness:
4 - 4½
Specific Gravity:
3.69
Crystal System:
Orthorhombic
Member of:
Name:
Named for its relationship to ancylite-(Ce), but with lanthanum being the dominant REE in the composition, according to the IMA Levinson rule. The root name is from the Greek αγκυλός ("ankylos") for "curved", in allusion to its usually rounded and distorted crystal shapes.
Unique Identifiers
Mindat ID:
6800
Long-form identifier:
mindat:1:1:6800:6
GUID
(UUID V4):
(UUID V4):
1fc98c82-6b54-4d9f-b688-0c253df4cfdf
IMA Classification of Ancylite-(La)
Approved
Approval year:
1995
First published:
1997
Type description reference:
Yakovenchuk, V. N., Menshikov, Y. P., Pakhomovsky, Y. A., Ivanyuk, G. Y. (1997) Ancylite-(La) Sr(La,Ce)(CO3)2·(OH)·H2O – a new carbonate from hydrothermal vein at the Kukisvumchorr mountain (Khibiny massif) and its comparison with ancylite-(Ce) Zapiski Vserossijskogo Mineralogicheskogo Obshchestva, 126 (1) 96-108
Classification of Ancylite-(La)
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
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 |
|---|---|---|
| Anc-La | 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 Ancylite-(La)
Vitreous
Transparency:
Translucent
Colour:
Colorless, pale yellowish gray, yellowish brown, yellow
Comment:
Colorless to pale yellow in thin section.
Streak:
White
Hardness:
4 - 4½ on Mohs scale
Tenacity:
Brittle
Cleavage:
None Observed
Fracture:
Conchoidal
Density:
3.69(5) g/cm3 (Measured) 3.93 g/cm3 (Calculated)
Optical Data of Ancylite-(La)
Type:
Biaxial (+)
RI values:
nα = 1.640(3) nβ = 1.668 nγ = 1.731(3)
2V:
Measured: 70° (5), Calculated: 70°
Max Birefringence:
δ = 0.091
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
r < v moderate
Comments:
β is calculated
Chemistry of Ancylite-(La)
Mindat Formula:
LaSr(CO3)2(OH) · H2O
Crystallography of Ancylite-(La)
Crystal System:
Orthorhombic
Class (H-M):
mmm (2/m 2/m 2/m) - Dipyramidal
Cell Parameters:
a = 5.072(3) Å, b = 8.589(3) Å, c = 7.276(3) Å
Ratio:
a:b:c = 0.591 : 1 : 0.847
Unit Cell V:
316.97 ų (Calculated from Unit Cell)
Z:
2
Morphology:
Crystals are dipyramidal {111}, with {120}, {101}, platy or short prismatic, faces typically curved, to 2 mm; in druses and uncommonly as skeletal or dendritic aggregates.
Comment:
Space group Pmcn by analogy with ancylite-(Ce).
Crystal Structure
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Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
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Labels
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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
| ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
|---|---|---|---|---|---|---|---|
| 0014913 | Ancylite-(La) | Petersen O V, Niedermayr G, Gault R A, Brandstatter F, Micheelsen H I, Giester G (2001) Ancylite-(La) from the Ilimaussaq alkaline complex, South Greenland Neues Jahrbuch fur Mineralogie, Monatshefte 2001 493-504 | 2001 | Ilimaussaq alkaline complex, South Greenland | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 2.955 Å | (100) |
| 4.36 Å | (92) |
| 3.705 Å | (90) |
| 2.664 Å | (89) |
| 3.738 Å | (88) |
| 2.358 Å | (87) |
| 2.092 Å | (80) |
| 4.29 Å | (66) |
| 2.147 Å | (57) |
| 2.021 Å | (57) |
| 2.334 Å | (52) |
| 2.986 Å | (47) |
| 1.950 Å | (44) |
| 5.55 Å | (42) |
| 2.536 Å | (42) |
| 1.851 Å | (42) |
Comments:
Mt. Kukisvumchorr, Kola Peninsula, Russia. Data are from the type description. The pattern is nearly identical to ancylite-(Ce).
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 | |
| 36 : Carbonatites, kimberlites, and related igneous rocks |
Type Occurrence of Ancylite-(La)
General Appearance of Type Material:
Druses of well-formed pale yellow crystals, typically 0.3–0.7 mm and up to 2 mm, commonly short prismatic. Also occurs rarely as skeletal or dendritic aggregates of platy crystals, and commonly as pseudomorphs after an unidentified hexagonal mineral.
Place of Conservation of Type Material:
St. Petersburg Mining Institute, St. Petersburg, Russia, 2092/1.
Geological Museum, Kola Scientific Center, Apatity, Russia.
Geological Museum, Kola Scientific Center, Apatity, Russia.
Geological Setting of Type Material:
A rare mineral in nepheline syenites in differentiated alkalic massifs.
Associated Minerals at Type Locality:
Reference:
Yakovenchuk, V.N., Menshikov, Y.P., Pakhomovsky, Y.A., Ivanyuk, G.Y. (1997) Ancylite-(La) Sr(La,Ce)(CO3)2·(OH)·H2O – a new carbonate from hydrothermal vein at the Kukisvumchorr mountain (Khibiny massif) and its comparison with ancylite-(Ce). Zapiski Vserossijskogo Mineralogicheskogo Obshchestva, 126(1), 96-108.
Synonyms of Ancylite-(La)
Ancylite (in part)
Other Language Names for Ancylite-(La)
Relationship of Ancylite-(La) to other Species
Member of:
Other Members of this group:
| Ancylite-(Ce) | CeSr(CO3)2(OH) · H2O | Orth. mmm (2/m 2/m 2/m) |
| Calcioancylite-(Ce) | (Ce,Ca,Sr)CO3(OH,H2O) | Orth. mmm (2/m 2/m 2/m) |
| Calcioancylite-(La) | (LaCa)(CO3)2(OH) · H2O | Orth. mmm (2/m 2/m 2/m) |
| Calcioancylite-(Nd) | Ca(Nd,La,Ce)(CO3)2(OH).H2O | Mon. m : Pm |
| Gysinite-(Ce) | PbCe(CO3)2(OH)(H2O) | Orth. mmm (2/m 2/m 2/m) |
| Gysinite-(La) | PbLa(CO3)2(OH) · H2O | Orth. mmm (2/m 2/m 2/m) |
| Gysinite-(Nd) | PbNd(CO3)2(OH) · H2O | Orth. mmm (2/m 2/m 2/m) |
Common Associates
Associated Minerals Based on Photo Data:
| 5 photos of Ancylite-(La) associated with Catapleiite | Na2Zr(Si3O9) · 2H2O |
| 2 photos of Ancylite-(La) associated with Microcline | K(AlSi3O8) |
| 2 photos of Ancylite-(La) associated with Aegirine | NaFe3+Si2O6 |
| 2 photos of Ancylite-(La) associated with Magnesio-arfvedsonite | {Na}{Na2}{Mg4Fe3+}(Si8O22)(OH)2 |
| 2 photos of Ancylite-(La) associated with Lorenzenite | Na2Ti2(Si2O6)O3 |
| 2 photos of Ancylite-(La) associated with Chabazite-Na | (Na2,K2,Ca,Sr,Mg)2[Al2Si4O12]2 · 12H2O |
| 2 photos of Ancylite-(La) associated with Fluorapophyllite-(K) | KCa4(Si8O20)(F,OH) · 8H2O |
| 1 photo of Ancylite-(La) associated with Albite | Na(AlSi3O8) |
| 1 photo of Ancylite-(La) associated with Natrolite | Na2Al2Si3O10 · 2H2O |
Related Minerals - Strunz-mindat Grouping
| 5.DC. | Calcioancylite-(La) | (LaCa)(CO3)2(OH) · H2O |
| 5.DC. | Gysinite-(La) | PbLa(CO3)2(OH) · H2O |
| 5.DC. | Gysinite-(Ce) | PbCe(CO3)2(OH)(H2O) |
| 5.DC.05 | Ancylite-(Ce) | CeSr(CO3)2(OH) · H2O |
| 5.DC.05 | Calcioancylite-(Ce) | (Ce,Ca,Sr)CO3(OH,H2O) |
| 5.DC.05 | Calcioancylite-(Nd) | Ca(Nd,La,Ce)(CO3)2(OH).H2O |
| 5.DC.05 | Gysinite-(Nd) | PbNd(CO3)2(OH) · H2O |
| 5.DC.05 | Unnamed (La-analogue of Calcioancylite-(Ce)) | (La,Ce,Nd,Ca,Sr)CO3(OH,H2O) |
| 5.DC.05 | Kozoite-(Nd) | (Nd,La,Sm,Pr)(CO3)(OH) |
| 5.DC.05 | Kozoite-(La) | (La,Nd)(CO3)(OH) |
| 5.DC.05 | Unnamed (Ce-analogue of Kozoite-(La) and -(Nd)) | (Ce,La)(CO3)(OH) |
| 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 with effervescence in 10% HCl.
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 Ancylite-(La)
mindat.org URL:
https://www.mindat.org/min-6800.html
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External Links:
References for Ancylite-(La)
Reference List:
Yakovenchuk, V. N., Menshikov, Y. P., Pakhomovsky, Y. A., Ivanyuk, G. Y. (1997) Ancylite-(La) Sr(La,Ce)(CO3)2·(OH)·H2O – a new carbonate from hydrothermal vein at the Kukisvumchorr mountain (Khibiny massif) and its comparison with ancylite-(Ce) Zapiski Vserossijskogo Mineralogicheskogo Obshchestva, 126 (1) 96-108
Localities for Ancylite-(La)
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.
Brazil | |
| Azzi (2017) |
| Andrezza Azzi et al. (2018) | |
Canada | |
| Horváth et al. (1998) |
| Horváth et al. (1998) | |
China | |
| Wu et al. (2023) |
| Wang +1 other reference |
Finland | |
| Ani et al. (2013) |
Greenland | |
| Petersen (2001) |
| Petersen et al. (2001) |
India | |
| Chakrabarty et al. (2018) |
Portugal | |
| Pedro Alves collection and analytical ... |
Russia | |
| Koneva A.A. et al. (2010) |
| Konev et al. (2005) | |
| Pavel M. Kartashov analytical data (1995) |
| |
| Arzamastsev et al. (2008) |
| PEKOV et al. (2013) | |
| Yakovenchuk et al. (1997) +1 other reference |
| Arzamastsev et al. (2008) | |
| Pavel.M. Kartashov (n.d.) |
| Neues Jahrbuch für Mineralogie (2003) |
| ... | |
| Zaitsev et al. (2004) |
USA | |
| Piccione et al. (2019) |
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Kukisvumchorr Mt, Khibiny Massif, Murmansk Oblast, Russia