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|System:||Monoclinic||Colour:||Honey-yellow to white|
|Lustre:||Vitreous||Hardness:||2 - 3|
|Name:||Named after Thomas Henry Clark (1893-1996), McGill University, Montreal, Quebec (Canada), noted for his studies of the geology of the St. Lawrence Lowlands.|
This page provides mineralogical data about Thomasclarkite-(Y).
Classification of Thomasclarkite-(Y)
|IMA status:||Approved 1997|
|Strunz 8th edition ID:||5/E.08-05|
|Nickel-Strunz 10th (pending) edition ID:||5.DC.20|
5 : CARBONATES (NITRATES)
D : Carbonates with additional anions, with H2O
C : With large cations
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Type Occurrence of Thomasclarkite-(Y)
|Type Locality:||Poudrette quarry (Demix quarry; Uni-Mix quarry; Desourdy quarry; Carrière Mont Saint-Hilaire), Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada|
Physical Properties of Thomasclarkite-(Y)
|Diaphaneity (Transparency):||Transparent, Translucent|
|Colour:||Honey-yellow to white|
|Hardness (Mohs):||2 - 3|
Crystallography of Thomasclarkite-(Y)
Optical Data of Thomasclarkite-(Y)
|RI values:||nω = 1.540 nε = 1.400|
|Maximum Birefringence:||δ = 0.140|
Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Chemical Properties of Thomasclarkite-(Y)
|Simplified for copy/paste:||(Na,Ce)(Y,REE)(HCO3)(OH)3·4H2O|
|Essential elements:||C, H, Na, O, Y|
|All elements listed in formula:||C, Ce, H, Na, O, Y|
Relationship of Thomasclarkite-(Y) to other Species
|Related Minerals - Nickel-Strunz Grouping):|
Other Names for Thomasclarkite-(Y)
|Health Warning:||No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.|
References for Thomasclarkite-(Y)
GRICE, J.D., and GAULT, R.A. (1998) Thomasclarkite (Y), a new sodium rare earth element bicarbonate mineral species from Mont Saint Hilaire, Quebec. Canadian Mineralogist, 36, 1293 1300.
Internet Links for Thomasclarkite-(Y)
Localities for Thomasclarkite-(Y)
The map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
(TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
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Locality Updated: Calbrita quarries, Alenquer, Lisbon District, PortugalFrom Rui Nunes, 27th Nov 2014 21:06:00