Petersenite-(Ce)
A valid IMA mineral species
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About Petersenite-(Ce)
Ole V. Petersen
Formula:
Na4(Ce,La,Nd)2(CO3)5
Colour:
Pinkish gray, yellow
Lustre:
Vitreous
Hardness:
3
Crystal System:
Monoclinic
Member of:
Name:
Named in 1994 by Joel D. Grice, Jerry Van Velthuizen, and Robert A. Gault in honour of Dr. Ole Valdemar Petersen (July 29, 1939, Gentofte, Denmark - March 31, 2020, Solrød, Denmark). Petersen was Curator of the Mineral Collection at The Geological Museum, University of Copenhagen and best known for his work on the mineralogy of alkaline rocks, especially those from Greenland.
A rare-earth-element carbonate.
Unique Identifiers
Mindat ID:
3174
Long-form identifier:
mindat:1:1:3174:1
Similar Names
| Pattersonite | A valid IMA mineral species | PbFe33+(PO4)2(OH)5 · H2O |
| Petersite | A synonym | |
| Petersite-(Ce) | A valid IMA mineral species | CeCu6(PO4)3(OH)6 · 3H2O |
| Petersite-(La) | A valid IMA mineral species | LaCu6(PO4)3(OH)6 · 3H2O |
| Petersite-(Y) | A valid IMA mineral species | YCu6(PO4)3(OH)6 · 3H2O |
| Pietersite | A variety of 'Chalcedony' [Quartz] | SiO2 |
IMA Classification of Petersenite-(Ce)
Approved
IMA Formula:
Na4Ce3+2(CO3)5
Approval year:
1992
First published:
1994
Classification of Petersenite-(Ce)
5.AD.15
5 : CARBONATES (NITRATES)
A : Carbonates without additional anions, without H2O
D : With rare-earth elements (REE)
5 : CARBONATES (NITRATES)
A : Carbonates without additional anions, without H2O
D : With rare-earth elements (REE)
14.4.5.2
14 : ANHYDROUS NORMAL CARBONATES
4 : Miscellaneous
14 : ANHYDROUS NORMAL CARBONATES
4 : Miscellaneous
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 |
|---|---|---|
| Pet-Ce | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Pronunciation of Petersenite-(Ce)
Pronunciation:
| Play | Recorded by | Country |
|---|---|---|
| Jolyon Ralph | United Kingdom |
Physical Properties of Petersenite-(Ce)
Optical Data of Petersenite-(Ce)
Type:
Biaxial (+/-)
RI values:
nα = 1.623 nβ = 1.636 nγ = 1.649
2V:
Measured: 85° to 95°, Calculated: 89.8°
Max. Birefringence:
δ = 0.026
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:
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
Pleochroism:
Non-pleochroic
Chemistry of Petersenite-(Ce)
Mindat Formula:
Na4(Ce,La,Nd)2(CO3)5
Element Weights:
Crystallography of Petersenite-(Ce)
Crystal System:
Monoclinic
Class (H-M):
2 - Sphenoidal
Space Group:
P21
Setting:
P21
Cell Parameters:
a = 20.872 Å, b = 6.367 Å, c = 10.601 Å
β = 120.50°
β = 120.50°
Ratio:
a:b:c = 3.278 : 1 : 1.665
Unit Cell V:
1,213.85 ų (Calculated from Unit Cell)
Morphology:
Striated prisms; acicular crystals
Crystal Structure
Load
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Show
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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
Console Off | On | Grey | Yellow
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) |
|---|---|---|---|---|---|---|---|
| 0005369 | Petersenite-(Ce) | Grice J D, Velthuizen J V, Gault R A (1994) Petersenite-(Ce), a new mineral from Mont Saint-Hilaire, and its structural relationship to other REE carbonates The Canadian Mineralogist 32 405-414 |  | 1994 | Mont Saint-Hilaire, Quebec, Canada | 0 | 293 |
CIF Raw Data - click here to close
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 Petersenite-(Ce)
Chemical Analysis of Type Material:
| Na2O | 17.38 % |
|---|---|
| CaO | 1.32 % |
| BaO | 0.32 % |
| SrO | 1.70 % |
| La2O3 | 14.49 % |
| Ce2O3 | 23.66 % |
| Pr2O3 | 2.00 % |
| Nd2O3 | 5.82 % |
| Sm2O3 | 0.60 % |
| CO2 | 32.92 % |
| Total: | 100.21 % |
Geological Setting of Type Material:
A late-stage pegmatitic phase of a nepheline-sodalite syenite,near the contact a hornfels unit
Associated Minerals at Type Locality:
Synonyms of Petersenite-(Ce)
Other Language Names for Petersenite-(Ce)
Relationship of Petersenite-(Ce) to other Species
Member of:
Other Members of Burbankite Group:
| Burbankite | (Na,Ca)3(Sr,Ba,Ce)3(CO3)5 | Hex. 6mm : P63mc |
| Calcioburbankite | Na3(Ca,REE,Sr)3(CO3)5 | Hex. 6mm : P63mc |
| Khanneshite | (Na,Ca)3(Ba,Sr,Ce,Ca)3(CO3)5 | Hex. 6mm : P63mc |
| Lishiite | (Ca2◻)Sr3(CO3)5 | Hex. 6mm : P63mc |
| Rémondite-(Ce) | Na3(Ce,Ca,Na)3(CO3)5 | Mon. 2 : P21 |
| Rémondite-(La) | Na3(La,Ca,Na)3(CO3)5 | Mon. 2 : P21 |
| Sanrománite | Na2CaPb3[CO3]5 | Hex. 6mm : P63mc |
Common Associates
Associations Based on Photo Data:
| 12 photos of Petersenite-(Ce) associated with Calcioburbankite | Na3(Ca,REE,Sr)3(CO3)5 |
| 8 photos of Petersenite-(Ce) associated with Siderite | FeCO3 |
| 8 photos of Petersenite-(Ce) associated with Albite | Na(AlSi3O8) |
| 6 photos of Petersenite-(Ce) associated with Aegirine | NaFe3+Si2O6 |
| 5 photos of Petersenite-(Ce) associated with Thomasclarkite-(Y) | (Na,Ce)(Y,REE)(HCO3)(OH)3 · 4H2O |
| 5 photos of Petersenite-(Ce) associated with Gaidonnayite | Na2Zr(Si3O9) · 2H2O |
| 3 photos of Petersenite-(Ce) associated with Microcline | K(AlSi3O8) |
| 3 photos of Petersenite-(Ce) associated with Analcime | Na(AlSi2O6) · H2O |
| 2 photos of Petersenite-(Ce) associated with Ferroceladonite | K(Fe2+Fe3+◻)(Si4O10)(OH)2 |
| 2 photos of Petersenite-(Ce) associated with Niveolanite | NaBe(CO3)(OH) · 2H2O |
Related Minerals - Strunz-mindat Grouping
| 5.AD.05 | Sahamalite-(Ce) | (Mg,Fe)(Ce,La,Nd)2(CO3)4 |
| 5.AD.15 | Rémondite-(La) | Na3(La,Ca,Na)3(CO3)5 |
| 5.AD.15 | Rémondite-(Ce) | Na3(Ce,Ca,Na)3(CO3)5 |
| 5.AD.20 | Paratooite-(La) | (La,Sr,Ca)4CuCa(Na,Ca)2(CO3)8 |
Fluorescence of Petersenite-(Ce)
No fluorescence
Other Information
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 Petersenite-(Ce)
mindat.org URL:
https://www.mindat.org/min-3174.html
Please feel free to link to this page.
Please feel free to link to this page.
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References for Petersenite-(Ce)
Reference List:
Grice, Joel D., Van Velthuizen, Jerry, Gault, Robert A. (1994) Petersenite-(Ce), a new mineral from Mont Saint-Hilaire, and its structural relationship to other REE carbonates. The Canadian Mineralogist, 32 (2) 405-414
Localities for Petersenite-(Ce)
Showing 4 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.
Canada (TL) | |
| Grice et al. (1994) +1 other reference |
Russia | |
| Arzamastsev et al. (2008) |
| 33 IGC excursion No 47 | |
| Pekov et al. (1998) |
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Poudrette quarry, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada