Calcioancylite-(Nd)
A valid IMA mineral species
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About Calcioancylite-(Nd)
Formula:
Ca(Nd,La,Ce)(CO3)2(OH).H2O
Colour:
Pale pink
Lustre:
Vitreous
Hardness:
4 - 4½
Specific Gravity:
4.02
Crystal System:
Monoclinic
Member of:
Name:
Named for the relationship to the previously described calcioancylite-(Ce), with neodymium being the dominant REE. The root name is from the Greek αγκυλός ("ankylos") for "curved", in allusion to its usually rounded and distorted crystal shapes, and the prefix "CALCIO-" in alluion to its composition with CALCIum dominant over strontium.
Unique Identifiers
Mindat ID:
856
Long-form identifier:
mindat:1:1:856:7
Similar Names
| Calcioancylite | A synonym | |
| Calcioancylite-(Ce) | A valid IMA mineral species - grandfathered | (Ce,Ca,Sr)CO3(OH,H2O) |
| Calcioancylite-(La) | A valid IMA mineral species | (LaCa)(CO3)2(OH) · H2O |
IMA Classification of Calcioancylite-(Nd)
Classification of Calcioancylite-(Nd)
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.1.1.3
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
11.8.12
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-Nd | 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-(Nd)
Vitreous
Transparency:
Transparent
Colour:
Pale pink
Streak:
White
Hardness:
4 - 4½ on Mohs scale
Tenacity:
Brittle
Fracture:
Irregular/Uneven
Density:
4.02 g/cm3 (Measured) 4.08 g/cm3 (Calculated)
Optical Data of Calcioancylite-(Nd)
Type:
Biaxial (-)
RI values:
nα = 1.66 nβ = 1.725 nγ = 1.761
2V:
Measured: 70° to 74°, Calculated: 70°
Max. Birefringence:
δ = 0.101
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:
weak, r < v
Optical Extinction:
Z = c
Pleochroism:
Non-pleochroic
Chemistry of Calcioancylite-(Nd)
Mindat Formula:
Ca(Nd,La,Ce)(CO3)2(OH).H2O
Element Weights:
Crystallography of Calcioancylite-(Nd)
Crystal System:
Monoclinic
Class (H-M):
m - Domatic
Space Group:
Pm
Cell Parameters:
a = 7.212(2) Å, b = 4.976(2) Å, c = 8.468(2) Å
β = 90.04(3)°
β = 90.04(3)°
Ratio:
a:b:c = 1.449 : 1 : 1.702
Unit Cell V:
303.89 ų (Calculated from Unit Cell)
Z:
1
Comment:
Pseudo-orthorhombic
Crystal Structure
Load
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Show
Big Balls | Small Balls | Just Balls | Spacefill
Polyhedra Off | Si Polyhedra | All Polyhedra
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Big Balls | Small Balls | Just Balls | Spacefill
Polyhedra Off | Si Polyhedra | All Polyhedra
Remove metal-metal sticks
Display Options
Black Background | White Background
Perspective On | Perspective Off
2D | Stereo | Red-Blue | Red-Cyan
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Perspective On | Perspective Off
2D | Stereo | Red-Blue | Red-Cyan
View
CIF File Best | x | y | z | a | b | c
CIF File Best | x | y | z | a | b | c
Rotation
Stop | Start
Stop | Start
Labels
Console Off | On | Grey | Yellow
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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) |
|---|---|---|---|---|---|---|---|
| 0006385 | Calcioancylite-(Nd) | Orlandi P, Pasero M, Vezzalini G (1990) Calcio-ancylite-(Nd), a new REE-carbonate from Baveno, Italy European Journal of Mineralogy 2 413-418 | 1990 | Baveno, Italy | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 4.26 Å | (100) |
| 2.905 Å | (90) |
| 2.048 Å | (80) |
| 3.67 Å | (70) |
| 2.320 Å | (70) |
| 1.979 Å | (70) |
| 5.49 Å | (60) |
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 |
Type Occurrence of Calcioancylite-(Nd)
General Appearance of Type Material:
Small pine-cone-like aggregate of crystals up to 1 mm long. Characterized by a bipyramidal pseudorhombic habit.
Place of Conservation of Type Material:
Municipal Natural History Museum, Milan, Italy, M29872.
Geological Setting of Type Material:
In a miarolitic cavity in granite.
Associated Minerals at Type Locality:
Synonyms of Calcioancylite-(Nd)
Other Language Names for Calcioancylite-(Nd)
Relationship of Calcioancylite-(Nd) 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-(Ce) | (Ce,Ca,Sr)CO3(OH,H2O) | Orth. mmm(2/m2/m2/m) |
| Calcioancylite-(La) | (LaCa)(CO3)2(OH) · H2O | Orth. mmm(2/m2/m2/m) |
| 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) |
Common Associates
Associations Based on Photo Data:
| 4 photos of Calcioancylite-(Nd) associated with Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| 3 photos of Calcioancylite-(Nd) associated with Albite | Na(AlSi3O8) |
| 3 photos of Calcioancylite-(Nd) associated with Fluorite | CaF2 |
| 3 photos of Calcioancylite-(Nd) associated with Quartz | SiO2 |
| 3 photos of Calcioancylite-(Nd) associated with Gadolinite-(Y) | Y2Fe2+Be2Si2O10 |
| 1 photo of Calcioancylite-(Nd) associated with Stilbite-Ca | NaCa4(Si27Al9)O72 · 28H2O |
| 1 photo of Calcioancylite-(Nd) associated with Jervisite | NaSc3+Si2O6 |
| 1 photo of Calcioancylite-(Nd) associated with Cascandite | CaScSi3O8(OH) |
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-(Ce) | (Ce,Ca,Sr)CO3(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 |
Fluorescence of Calcioancylite-(Nd)
Not fluorescent.
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-(Nd)
mindat.org URL:
https://www.mindat.org/min-856.html
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Please feel free to link to this page.
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References for Calcioancylite-(Nd)
Reference List:
Localities for Calcioancylite-(Nd)
Showing 5 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.
Australia | |
| Kolitsch et al. (2026) +1 other reference |
Italy | |
| Albertini et al. (2006) +1 other reference |
| Orlandi et al. (1990) |
Norway | |
| Husdal (2009) +1 other reference |
Switzerland | |
| Meisser (2012) |
Quick NavTopAbout Calcioancylite-(Nd)Unique IdentifiersSimilar NamesIMA Classification Classification Mineral SymbolsPhysical Properties Optical Data Chemistry Crystallography Crystal StructureX-Ray Powder DiffractionGeological EnvironmentType Occurrence SynonymsOther LanguagesRelationshipsCommon AssociatesStrunz-MindatFluorescence Other InformationInternet Links References Localities Locality List
Seula mine, Mount Camoscio, Oltrefiume, Baveno, Verbano-Cusio-Ossola Province, Piedmont, Italy