Chopinite
A valid IMA mineral species
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About Chopinite
Christian Chopin
Formula:
Mg3(PO4)2
Colour:
Colorless
Specific Gravity:
3.34 (Calculated)
Crystal System:
Monoclinic
Member of:
Name:
Named in honor of Christian Chopin (1955), French mineralogist and petrologist, Directeur de recherche au CNRS, for his major contributions to the mineralogy of phosphates.
Type Locality:
Dimorph of:
Unique Identifiers
Mindat ID:
29096
Long-form identifier:
mindat:1:1:29096:4
GUID
(UUID V4):
(UUID V4):
ebf6569a-01df-49a3-bc69-a3b8917614ac
IMA Classification of Chopinite
Approved
Approval year:
2006
First published:
2007
Type description reference:
Grew, Edward S., Armbruster, Thomas, Medenbach, Olaf, Yates, Martin G., Carson, Christopher J. (2007) Chopinite, [(Mg,Fe)3◻(PO4)2, a new mineral isostructural with sarcopside, from a fluorapatite segregation in granulite-facies paragneiss, Larsemann Hills, Prydz Bay, East Antarctica. European Journal of Mineralogy, 19 (2) 229-245 doi:10.1127/0935-1221/2007/0019-1712
Classification of Chopinite
8.AB.15
8 : PHOSPHATES, ARSENATES, VANADATES
A : Phosphates, etc. without additional anions, without H2O
B : With medium-sized cations
8 : PHOSPHATES, ARSENATES, VANADATES
A : Phosphates, etc. without additional anions, without H2O
B : With medium-sized cations
Dana 7th ed.:
38.3.1.3
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 |
|---|---|---|
| Cpn | 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 Chopinite
Transparency:
Transparent
Colour:
Colorless
Cleavage:
Distinct/Good
Possibly {001} and {100}
Possibly {001} and {100}
Density:
3.34 g/cm3 (Calculated)
Optical Data of Chopinite
Type:
Biaxial (-)
RI values:
nα = 1.595(2) nβ = 1.648(2) nγ = 1.656(2)
2V:
Measured: 40° (2), Calculated: 41°
Max Birefringence:
δ = 0.061
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:
Not visible
Chemistry of Chopinite
Mindat Formula:
Mg3(PO4)2
Elements listed:
Crystallography of Chopinite
Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/b
Setting:
P21/c
Cell Parameters:
a = 5.9305(7) Å, b = 4.7583(6) Å, c = 10.2566(10) Å
β = 90.663(9)°
β = 90.663(9)°
Ratio:
a:b:c = 1.246 : 1 : 2.156
Unit Cell V:
289.41 ų (Calculated from Unit Cell)
Z:
2
Twinning:
Extensive polysynthetic twinning
Crystal Structure
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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) |
|---|---|---|---|---|---|---|---|
| 0007216 | Chopinite | Grew E S, Armbruster T, Medenbach O, Yates M G, Carson C J (2007) Chopinite, [(Mg,Fe)3_](PO4)2, a new mineral isostructural with sarcopside, from a fluorapatite segregation in granulite-facies paragneiss, Larsemann Hills, Prydz Bay, East Antarctica European Journal of Mineralogy 19 229-245 | 2007 | Brattnevet, Larsemann Hills, Prydz Bay, East Antarctica | 0 | 293 | |
| 0016699 | Chopinite | Berthet G, Joubert J, Bertaut E (1972) Vacancies ordering in new metastable orthophosphates (Co3)P2O8 and (Mg3)P2O8 with olivine-related structure _cod_database_code 1008830 Zeitschrift fur Kristallographie 136 98-105 |  | 1972 | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 5.92 Å | (42) |
| 4.31 Å | (29) |
| 3.84 Å | (100) |
| 3.48 Å | (37) |
| 2.97 Å | (25) |
| 2.77 Å | (46) |
| 2.51 Å | (59) |
| 2.44 Å | (40) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 2: Planetesimal differentiation and alteration | 4.566-4.550 |
| 6 : Secondary asteroid phases | 4.566-4.560 |
Type Occurrence of Chopinite
General Appearance of Type Material:
anhedral and range from 0.1 × 0.3 mm to 0.2 × 0.6 mm in size
Place of Conservation of Type Material:
Holotype material (sample no. 121401E and thin section 121401E4) is deposited in the Musee de Mineralogie, Ecole
des Mines de Paris as catalogue number M 73096.
des Mines de Paris as catalogue number M 73096.
Geological Setting of Type Material:
Metamorphic fluorapatite segregation in granulite-facies.
Reference:
Grew, E.S., Armbruster, Th., Medenbach, O., Yates, M.G., Carson, C.J. (2007) Chopinite, (Mg,Fe)3(PO4)2, a new mineral isostructural with sarcopside, from a fluorapatite segregation in granulite-facies paragneiss, Larsemann Hills, Prydz Bay, East Antarctica. European Journal of Mineralogy: 19: 229-245.
Synonyms of Chopinite
Other Language Names for Chopinite
Relationship of Chopinite to other Species
Member of:
Other Members of this group:
| Sarcopside | Fe2+3(PO4)2 | Mon. 2/m : P21/b |
| Zavalíaite | (Mn2+,Fe2+,Mg)3(PO4)2 | Mon. 2/m : P21/b |
Common Associates
Associated Minerals Based on Photo Data:
| 6 photos of Chopinite associated with Fluorapatite | Ca5(PO4)3F |
Related Minerals - Strunz-mindat Grouping
| 8.AB. | Rodolicoite | Fe3+PO4 |
| 8.AB. | Johanngeorgenstadtite | Ni2+4.5(AsO4)3 |
| 8.AB. | Borisenkoite | Cu3[(V,As)O4]2 |
| 8.AB. | Niasite | Ni2+4.5(AsO4)3 |
| 8.AB. | Olsenite | KFe4(PO4)3 |
| 8.AB. | Karwowskiite | Ca9Mg(Fe2+0.5◻0.5)(PO4)7 |
| 8.AB.05 | Farringtonite | Mg3(PO4)2 |
| 8.AB.10 | Ferrisicklerite | Li1-x(Fe3+xFe2+1-x)PO4 |
| 8.AB.10 | Heterosite | (Fe3+,Mn3+)PO4 |
| 8.AB.10 | Lithiophilite | LiMn2+PO4 |
| 8.AB.10 | Natrophilite | NaMn2+PO4 |
| 8.AB.10 | Purpurite | Mn3+(PO4) |
| 8.AB.10 | Sicklerite | Li1-x(Mn3+xMn2+1-x)PO4 |
| 8.AB.10 | Simferite | LiMg(PO4) |
| 8.AB.10 | Triphylite | LiFe2+PO4 |
| 8.AB.10 | Karenwebberite | NaFe2+PO4 |
| 8.AB.15 | Sarcopside | Fe2+3(PO4)2 |
| 8.AB.15 | Zavalíaite | (Mn2+,Fe2+,Mg)3(PO4)2 |
| 8.AB.20 | Beusite | Mn2+Mn2+2 (PO4)2 |
| 8.AB.20 | Graftonite | Fe2+Fe2+2(PO4)2 |
| 8.AB.20 | Graftonite-(Ca) | CaFe2+2(PO4)2 |
| 8.AB.20 | Graftonite-(Mn) | MnFe2+2(PO4)2 |
| 8.AB.20 | Beusite-(Ca) | CaMn2+2(PO4)2 |
| 8.AB.25 | Xanthiosite | Ni3(AsO4)2 |
| 8.AB.30 | Lammerite | Cu3(AsO4)2 |
| 8.AB.30 | Paralammerite | Cu3(AsO4)2 |
| 8.AB.35 | Mcbirneyite | Cu3(VO4)2 |
| 8.AB.35 | Stranskiite | Zn2Cu(AsO4)2 |
| 8.AB.35 | Pseudolyonsite | Cu3(VO4)2 |
| 8.AB.40 | Lyonsite | Cu3Fe4(VO4)6 |
| 8.AB.40 | Michalskiite | Fe3+1.33Cu2+2(MgFe3+)2(VO4)6 |
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 Chopinite
mindat.org URL:
https://www.mindat.org/min-29096.html
Please feel free to link to this page.
Please feel free to link to this page.
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References for Chopinite
Reference List:
Grew, Edward S., Armbruster, Thomas, Medenbach, Olaf, Yates, Martin G., Carson, Christopher J. (2007) Chopinite, [(Mg,Fe)3◻(PO4)2, a new mineral isostructural with sarcopside, from a fluorapatite segregation in granulite-facies paragneiss, Larsemann Hills, Prydz Bay, East Antarctica. European Journal of Mineralogy, 19 (2) 229-245 doi:10.1127/0935-1221/2007/0019-1712
Localities for Chopinite
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.
Antarctica (TL) | |
| American Mineralogist: 93: 255. +1 other reference |
| Grew et al. (2010) |
Quick NavTopAbout ChopiniteUnique IdentifiersIMA Classification Classification Mineral SymbolsPhysical Properties Optical Data Chemistry Crystallography Crystal StructureX-Ray Powder DiffractionGeological EnvironmentType Occurrence SynonymsOther LanguagesRelationshipsCommon AssociatesStrunz-MindatOther InformationInternet Links References Localities Locality List
Brattnevet Peninsula, Larsemann Hills, Prydz Bay, Ingrid Christensen Coast, Princess Elizabeth Land, Eastern Antarctica, Antarctica