Thomasclarkite-(Y)
A valid IMA mineral species
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About Thomasclarkite-(Y)
Formula:
(Na,Ce)(Y,REE)(HCO3)(OH)3 · 4H2O
Colour:
Honey-yellow to white
Lustre:
Vitreous
Hardness:
2 - 3
Specific Gravity:
2.30
Crystal System:
Monoclinic
Name:
Named in honor of Thomas Henry Clark (1893-1996), Professor of Geology, McGill University, Montreal, Quebec (Canada), noted for his studies of the geology of the St. Lawrence Lowlands. The suffix/modifier follows the Levinson rule, indicating that the predominant essential REE is yttrium.
This page provides mineralogical data about Thomasclarkite-(Y).
Unique Identifiers
Mindat ID:
7336
Long-form identifier:
mindat:1:1:7336:9
GUID
(UUID V4):
(UUID V4):
4a65ae21-951b-4632-bc95-172906d3c2dc
IMA Classification of Thomasclarkite-(Y)
Classification of Thomasclarkite-(Y)
5.DC.20
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 |
---|---|---|
Tcl-Y | 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 Thomasclarkite-(Y)
Vitreous
Transparency:
Transparent, Translucent
Colour:
Honey-yellow to white
Streak:
White
Hardness:
2 - 3 on Mohs scale
Tenacity:
Brittle
Cleavage:
Perfect
Perfect on {010}.
Perfect on {010}.
Parting:
Parting on {101}.
Fracture:
Irregular/Uneven
Density:
2.30(2) g/cm3 (Measured) 2.34 g/cm3 (Calculated)
Optical Data of Thomasclarkite-(Y)
Type:
Uniaxial (-)
RI values:
nω = 1.540(4) nε = 1.400(2)
Max Birefringence:
δ = 0.140
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
Chemistry of Thomasclarkite-(Y)
Mindat Formula:
(Na,Ce)(Y,REE)(HCO3)(OH)3 · 4H2O
Crystallography of Thomasclarkite-(Y)
Crystal System:
Monoclinic
Class (H-M):
2 - Sphenoidal
Space Group:
P2
Setting:
P2
Cell Parameters:
a = 4.556 Å, b = 13.018 Å, c = 4.556 Å
β = 90.15°
β = 90.15°
Ratio:
a:b:c = 0.35 : 1 : 0.35
Unit Cell V:
270.2 ų
Z:
1
Morphology:
Blocky, pseudo-tetragonal crystals. Forms observed are the pedions {010} and {010}, sphenoids {111}, {111}, {111} and {111} and the pinacoids {101} and {101}.
Twinning:
Merohedral twinning on {101} is ubiquitous.
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) |
---|---|---|---|---|---|---|---|
0005579 | Thomasclarkite-(Y) | Grice J D, Gault R A (1998) Thomasclarkite-(Y), a new sodium - rare-earth-element bicarbonate mineral species from Mont Saint-Hilaire, Quebec The Canadian Mineralogist 36 1293-1300 | 1998 | Mont Saint-Hilaire, Quebec, Canada | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
12.97 Å | (100) |
6.52 Å | (30) |
4.57 Å | (30) |
4.32 Å | (50) |
3.223 Å | (30) |
3.133 Å | (50) |
2.593 Å | (30) |
2.035 Å | (30) |
2.016 Å | (40) |
1.844 Å | (30) |
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 Thomasclarkite-(Y)
General Appearance of Type Material:
Individual, well-formed, blocky, white-to-yellow crystals up to 2 mm in length.
Place of Conservation of Type Material:
Canadian Museum of Nature, Ottawa, Ontario, Canada, 81553–81555.
Associated Minerals at Type Locality:
Synonyms of Thomasclarkite-(Y)
Other Language Names for Thomasclarkite-(Y)
German:Thomasclarkit-(Y)
Russian:Томаскларкит-(Y)
Common Associates
Associated Minerals Based on Photo Data:
25 photos of Thomasclarkite-(Y) associated with Franconite | Na(Nb2O5)(OH) · 3H2O |
20 photos of Thomasclarkite-(Y) associated with Adamsite-(Y) | NaY[CO3]2 · 6H2O |
17 photos of Thomasclarkite-(Y) associated with Albite | Na(AlSi3O8) |
11 photos of Thomasclarkite-(Y) associated with Aegirine | NaFe3+Si2O6 |
8 photos of Thomasclarkite-(Y) associated with Siderite | FeCO3 |
5 photos of Thomasclarkite-(Y) associated with Petersenite-(Ce) | Na4(Ce,La,Nd)2(CO3)5 |
5 photos of Thomasclarkite-(Y) associated with Zircon | Zr(SiO4) |
5 photos of Thomasclarkite-(Y) associated with Synchysite-(Ce) | CaCe(CO3)2F |
4 photos of Thomasclarkite-(Y) associated with Rhodochrosite | MnCO3 |
3 photos of Thomasclarkite-(Y) 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 | Ancylite-(La) | LaSr(CO3)2(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.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 Thomasclarkite-(Y)
Not fluorescent.
Other Information
Notes:
Dissolves readily with strong effervesce 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 Thomasclarkite-(Y)
mindat.org URL:
https://www.mindat.org/min-7336.html
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References for Thomasclarkite-(Y)
Localities for Thomasclarkite-(Y)
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).
Struck out - Mineral was erroneously reported from this locality.
Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).
All localities listed without proper references should be considered as questionable.
All localities listed without proper references should be considered as questionable.
Canada (TL) | |
| Grice et al. (1998) |
Norway | |
| Husdal (2019) |
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Poudrette quarry, Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada