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|System:||Trigonal||Colour:||Colourless to light pink|
|Name:||For Yuri Gagarin (1934-1968), the first Russian cosmonaut.|
Original name (zajacite-(Ce)): For Dr. Ihor Stephan Zajac (1935- ), the geologist who lead the exploration group that discovered the Strange Lake deposit and who first recognized the mineral.
Renamed in 2010 (IMA 10-C); the original name "zajacite-(Ce)" is discredited.
Ce-analogue of gagarinite-(Y).
Classification of Gagarinite-(Ce)
|IMA status:||Renamed approved 2010|
|Strunz 8th edition ID:||3/A.08-45|
|Strunz 9th edition ID:||3.AB.35|
|Nickel-Strunz 10th (pending) edition ID:||3.AB.35|
3 : HALIDES
A : Simple halides, without H2O
B : M:X = 1:2
|Dana 8th edition ID:||22.214.171.124|
11 : HALIDE COMPLEXES
5 : AmBX6
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Type Occurrence of Gagarinite-(Ce)
|Co-type Localities:||Lac Brisson Complex (Strange Lake Complex), Nunavik, Nord-du-Québec, Québec, Canada|
Strange Lake complex (Lac Brisson complex), Québec & Newfoundland and Labrador, Canada
Physical Properties of Gagarinite-(Ce)
|Colour:||Colourless to light pink|
Crystallography of Gagarinite-(Ce)
Optical Data of Gagarinite-(Ce)
|RI values:||nω = 1.483 nε = 1.503|
|Maximum Birefringence:||δ = 0.020|
Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Chemical Properties of Gagarinite-(Ce)
|Simplified for copy/paste:||Na(REExCa1-x)(REEyCa1-y)F6|
|Essential elements:||Ca, F, Na|
|All elements listed in formula:||Ca, F, Na|
Relationship of Gagarinite-(Ce) to other Species
|Related Minerals - Nickel-Strunz Grouping):|
Other Names for Gagarinite-(Ce)
|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 Gagarinite-(Ce)
SCIBERRAS, M.J., LEVERETT, P., WILLIAMS, P.A., HIBBS, D.E., ROBERTS, A.C. & GRICE, J.D. (2011) The single-crystal X-ray study of zajacite-(Ce) and the redefinition of zajazite-(Ce) as gagarinite-(Ce). Canadian Mineralogist 49, 1111-1114.
Internet Links for Gagarinite-(Ce)
Localities for Gagarinite-(Ce)
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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