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Donnayite-(Y)
A valid IMA mineral species
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About Donnayite-(Y)
Joseph D. H. and Gabrielle Donnay
Formula:
NaCaSr3Y(CO3)6 · 3H2O
Colour:
pale yellow to yellow, colorless, white, grey, brown to reddish brown
Lustre:
Vitreous
Hardness:
3
Specific Gravity:
3.30
Crystal System:
Triclinic
Member of:
Name:
Named donnayite in 1978 by Chao et al. in honor of Joseph Désiré Hubert Donnay (6 June 1902, Oreye, LiÚge province, Belgium - 8 August 1994, Mont Saint Hilaire, Quebec, Canada), Professor of Mineralogy and Crystallography, Johns Hopkins University, Baltimore, U.S.A. and his wife Gabrielle (Gai) Donnay-Hamburger (21 March 1920, Landeshut, Lower Silesia, Germany (now Kamienna Góra, Poland) - 4 April 1987, Mont St. Hilaire, Quebec, Canada), Professor of Crystallography, McGill University, Montréal, Canada, for their significant contributions to crystallography. He was awarded the 1971 Roebling medal. She is known for solving the complex structure of tourmaline, and later solved numerous other structures. The suffix/modifier was added by the IMA in 1987 to conform to the Levinson rule for species with essential REE, indicating, in this case, predominant yttrium.
Type Locality:
Polymorph of:
Two polytypes are known, donnayite-(Y)-1A and donnayite-(Y)-3R.
The UM1992-05-CO:CaCeLaNaSr phase, although suggested to be polymorphous with donnayite-(Y), slightly differs in terms of chemistry.
Re-examination of donnayite-(Y) type specimens showed that the original description contains data collected on two different phases with simplified formulae NaCaSr3Y(CO3)6.3H2O and Na2Sr2YCe(CO3)6.3H2O. The latter corresponds to alicewilsonite-(YCe)(IMA 2020-055). A another specimen with donnayite-(Y), with the ideal formula NaCaSr3Y(CO3)6.3H2O was redefined by IMA as the holotype of donnayite-(Y) (IMA 2022, Proposal 22-F)
The UM1992-05-CO:CaCeLaNaSr phase, although suggested to be polymorphous with donnayite-(Y), slightly differs in terms of chemistry.
Re-examination of donnayite-(Y) type specimens showed that the original description contains data collected on two different phases with simplified formulae NaCaSr3Y(CO3)6.3H2O and Na2Sr2YCe(CO3)6.3H2O. The latter corresponds to alicewilsonite-(YCe)(IMA 2020-055). A another specimen with donnayite-(Y), with the ideal formula NaCaSr3Y(CO3)6.3H2O was redefined by IMA as the holotype of donnayite-(Y) (IMA 2022, Proposal 22-F)
Unique Identifiers
Mindat ID:
1309
Long-form identifier:
mindat:1:1:1309:9
Similar Names
| Downeyite | A valid IMA mineral species | SeO2 |
IMA Classification of Donnayite-(Y)
Approved
IMA status notes:
Redefined by the IMA, Renamed by the IMA
IMA Formula:
NaSr3CaY(CO3)6·3H2O
Approval year:
1978
First published:
1978
Approval history:
1987: Renamed as donnayite-(Ce)
2022: Holotype redefined by IMA (Proposal 22-F).
2022: Holotype redefined by IMA (Proposal 22-F).
Classification of Donnayite-(Y)
5.CC.05
5 : CARBONATES (NITRATES)
C : Carbonates without additional anions, with H2O
C : With rare earth elements (REE)
5 : CARBONATES (NITRATES)
C : Carbonates without additional anions, with H2O
C : With rare earth elements (REE)
15.3.4.1
15 : HYDRATED NORMAL CARBONATES
3 : AmBn(XO3)p·xH2O, with (m+n):p = 1:1
15 : HYDRATED NORMAL CARBONATES
3 : AmBn(XO3)p·xH2O, with (m+n):p = 1:1
11.8.16
11 : Carbonates
8 : Carbonates of the rare earths
11 : Carbonates
8 : Carbonates of the rare earths
Mineral Symbols
As of 2021 there are now IMAâCNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference for Standard |
|---|---|---|
| Dna-Y | IMAâCNMNC | Warr, L.N. (2021). IMAâCNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Donnayite-(Y)
Vitreous
Transparency:
Transparent
Colour:
Pale yellow to yellow, colorless, white, grey, brown to reddish brown
Streak:
White
Hardness:
3 on Mohs scale
Cleavage:
Imperfect/Fair
Basal cleavage indistinct to fair
Basal cleavage indistinct to fair
Density:
3.30 g/cm3 (Measured) 3.266 g/cm3 (Calculated)
Optical Data of Donnayite-(Y)
Type:
Biaxial (-)
RI values:
nα = 1.551 - 1.561 nβ = 1.646 nγ = 1.652
2V:
Calculated: 26° to 28°
Max. Birefringence:
δ = 0.091 - 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 ”m 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 ”m 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:
r > v strong
Chemistry of Donnayite-(Y)
Mindat Formula:
NaCaSr3Y(CO3)6 · 3H2O
Element Weights:
Crystallography of Donnayite-(Y)
Crystal System:
Triclinic
Class (H-M):
1 - Pedial
Space Group:
P1
Cell Parameters:
a = 9.000 Å, b = 8.999 Å, c = 6.793 Å
α = 102.77°, β = 116.28°, γ = 59.99°
α = 102.77°, β = 116.28°, γ = 59.99°
Ratio:
a:b:c = 1 : 1 : 0.755
Unit Cell V:
427.17 Ă
Âł (Calculated from Unit Cell)
Z:
1
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) |
|---|---|---|---|---|---|---|---|
| 0018482 | Donnayite-(Y) | Tjy C T L, Pobedimskaya E A, Nadezhina T N, Khomyakov A P (1992) Polymorphism of donnayite (Na,TR)Sr(CO3)2*H2O Moscow University Geology Bulletin 47 60-70 | 1992 | Khibiny alkaline massif | 0 | 293 | |
| 0018481 | Donnayite-(Y) | Tjy C T L, Pobedimskaya E A, Nadezhina T N, Khomyakov A P (1992) Polymorphism of donnayite (Na,TR)Sr(CO3)2*H2O Moscow University Geology Bulletin 47 60-70 | 1992 | Khibiny alkaline massif | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 2.839 Ă | (100) |
| 4.368 Ă | (70) |
| 6.103 Ă | (40) |
| 2.598 Ă | (40) |
| 3.209 Ă | (30) |
| 2.038 Ă | (30) |
| 2.018 Ă | (30) |
Comments:
Mont Saint-Hilaire, Quebec, Canada. Data from the type description.
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 Donnayite-(Y)
General Appearance of Type Material:
Platy, tabular, columnar, saucer-shaped, barrel-shaped to irregularly granular. Crystals to 2 mm.
Place of Conservation of Type Material:
CMNMC 39396 at the Canadian Museum of Nature, 240 McLeod St, Ottawa, ON K2P 2R1, Canada.
Geological Setting of Type Material:
Pegmatite dykes, miarolitic cavities and interstices in nepheline syenite.
Associated Minerals at Type Locality:
Synonyms of Donnayite-(Y)
Other Language Names for Donnayite-(Y)
Dutch:Donnayiet-(Y)
German:Donnayit-(Y)
Simplified Chinese:çąłéé¶çł
Traditional Chinese:çąłéé¶çł
Relationship of Donnayite-(Y) to other Species
Member of:
Other Members of Mckelveyite Group:
| Alicewilsonite-(YCe) | Na2Sr2YCe(CO3)6 · 3H2O | Tric. 1 : P1 |
| Alicewilsonite-(YLa) | Na2Sr2YLa(CO3)6 · 3H2O | Tric. 1 : P1 |
| Bainbridgeite-(NdCe) | Na2Ba2NdCe(CO3)6 · 3H2O | Tric. 1 : P1 |
| Bainbridgeite-(YCe) | Na2Ba2YCe(CO3)6 · 3H2O | Tric. 1 : P1 |
| Ewaldite | Ba(Na,Ca,Y,Ce,K)(CO3)2 · 2.6H2O | Hex. 6mm : P63mc |
| Mckelveyite-(Nd) | NaCaBa3Nd(CO3)6 · 3H2O | Mon. m : Bb |
| Mckelveyite-(Y) | NaCaBa3Y(CO3)6 · 3H2O | Tric. 1 : P1 |
| Weloganite | Na2Sr3Zr(CO3)6 · 3H2O | Tric. 1 : P1 |
Common Associates
Associations Based on Photo Data:
| 36 photos of Donnayite-(Y) associated with Calcite | CaCO3 |
| 32 photos of Donnayite-(Y) associated with Pyrite | FeS2 |
| 30 photos of Donnayite-(Y) associated with Ewaldite | Ba(Na,Ca,Y,Ce,K)(CO3)2 · 2.6H2O |
| 19 photos of Donnayite-(Y) associated with Albite | Na(AlSi3O8) |
| 13 photos of Donnayite-(Y) associated with Alicewilsonite-(YCe) | Na2Sr2YCe(CO3)6 · 3H2O |
| 7 photos of Donnayite-(Y) associated with Analcime | Na(AlSi2O6) · H2O |
| 7 photos of Donnayite-(Y) associated with Strontianite | SrCO3 |
| 7 photos of Donnayite-(Y) associated with Gaidonnayite | Na2Zr(Si3O9) · 2H2O |
| 4 photos of Donnayite-(Y) associated with Kamphaugite-(Y) | Ca(Y,REE)(CO3)2(OH) · H2O |
| 4 photos of Donnayite-(Y) associated with Dolomite | CaMg(CO3)2 |
Related Minerals - Strunz-mindat Grouping
| 5.CC. | Bainbridgeite-(NdCe) | Na2Ba2NdCe(CO3)6 · 3H2O |
| 5.CC. | Yuchuanite-(Y) | Y2(CO3)3 · H2O |
| 5.CC. | Alicewilsonite-(YCe) | Na2Sr2YCe(CO3)6 · 3H2O |
| 5.CC.05 | Alicewilsonite-(YLa) | Na2Sr2YLa(CO3)6 · 3H2O |
| 5.CC.05 | Mckelveyite-(Nd) | NaCaBa3Nd(CO3)6 · 3H2O |
| 5.CC.05 | Mckelveyite-(Y) | NaCaBa3Y(CO3)6 · 3H2O |
| 5.CC.05 | Ewaldite | Ba(Na,Ca,Y,Ce,K)(CO3)2 · 2.6H2O |
| 5.CC.05 | 'UM1992-05-CO:CaCeLaNaSr' | (Sr,Na,Y,REE,Ca,Ba)2(CO3)2 · H2O |
| 5.CC.05 | Weloganite | Na2Sr3Zr(CO3)6 · 3H2O |
| 5.CC.05 | Mckelveyite Group | A3B3(CO3)6 · 3H2O |
| 5.CC.05 | Bainbridgeite-(YCe) | Na2Ba2YCe(CO3)6 · 3H2O |
| 5.CC.05 | 'Unnamed (MSH UK-37A)' | Sr3NaCaY(CO3)6 · 3H2O |
| 5.CC.10 | Tengerite-(Y) | Y2(CO3)3 · 2-3H2O |
| 5.CC.15 | Lokkaite-(Y) | Ca(Y,Gd,Nd,Dy)4(CO3)7 · 9H2O |
| 5.CC.15 | Kimuraite-(Y) | Ca(Y,Nd)2(CO3)4 · 6H2O |
| 5.CC.15 | Hizenite-(Y) | Ca2Y6(CO3)11 · 14H2O |
| 5.CC.20 | Shomiokite-(Y) | Na3Y[CO3]3 · 3H2O |
| 5.CC.25 | Lanthanite-(Ce) | Ce2(CO3)3 · 8H2O |
| 5.CC.25 | Lanthanite-(La) | La2(CO3)3 · 8H2O |
| 5.CC.25 | Lanthanite-(Nd) | Nd2(CO3)3 · 8H2O |
| 5.CC.25 | Calkinsite-(Ce) | (Ce,La)2(CO3)3 · 4H2O |
| 5.CC.30 | Adamsite-(Y) | NaY[CO3]2 · 6H2O |
| 5.CC.35 | Decrespignyite-(Y) | Cu(Y,REE)4(CO3)4(OH)5Cl · 2H2O |
| 5.CC.40 | Galgenbergite-(Ce) | Ca(Ce,La,Nd)2(CO3)4 · H2O |
| 5.CC.45 | Lecoqite-(Y) | Na3Y(CO3)3 · 6H2O |
Other Information
Notes:
Dissolves in HCl with strong effervescence
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 Donnayite-(Y)
mindat.org URL:
https://www.mindat.org/min-1309.html
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References for Donnayite-(Y)
Reference List:
Chao, George Y., Mainwaring, P. R., Baker, J. (1978) Donnayite, NaCaSr3Y(CO3)6·3H2O, a new mineral from Mont St-Hilaire, Québec. The Canadian Mineralogist, 16 (3) 335-340
Localities for Donnayite-(Y)
Showing 17 localities.
symbol to view information about a locality.
The Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
â - 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 | |
| Pring et al. (2006) +2 other references |
Austria | |
| Kolitsch et al. (2016) |
Bolivia | |
| A.R. Kampf |
Canada (TL) | |
| Chao et al. (1978) +1 other reference |
| HorvĂĄth et al. (1998) |
| HorvĂĄth et al. (1998) | |
Greenland | |
| Petersen et al. (2003) |
Russia | |
| Belovitskaya et al. (2004) |
| Zaitsev et al. (1998) +1 other reference |
| [World of Stones 95:5-6 +1 other reference |
| Yakovenchuk et al. (2024) | |
| Pekov et al. (2003) +3 other references | |
| American Mineralogist | |
| Khomyakov (1995) | |
| ... +1 other reference |
South Africa | |
| VERWOERD (1993) |
USA | |
| Robin D. Tibbit (deceased) |
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