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Gagarinite-(Ce)

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Yurii Alexeevich Gagarin - the first man visited space.
Formula:
Na(REExCa1-x)(REEyCa1-y)F6
Colour:
Colourless to light pink
Lustre:
Vitreous
Hardness:
Crystal System:
Trigonal
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).


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Classification of Gagarinite-(Ce)Hide

Approved
Notes:
Renamed by the IMA
3.AB.35

3 : HALIDES
A : Simple halides, without H2O
B : M:X = 1:2
11.5.6.2

11 : HALIDE COMPLEXES
5 : AmBX6

Pronounciation of Gagarinite-(Ce)Hide

Pronounciation:
PlayRecorded byCountry
Jolyon & Katya RalphUnited Kingdom

Physical Properties of Gagarinite-(Ce)Hide

Vitreous
Transparency:
Transparent
Colour:
Colourless to light pink
Hardness:
3½ on Mohs scale

Optical Data of Gagarinite-(Ce)Hide

Type:
Uniaxial (+)
RI values:
nω = 1.483 nε = 1.503
Max Birefringence:
δ = 0.020
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate

Chemical Properties of Gagarinite-(Ce)Hide

Formula:
Na(REExCa1-x)(REEyCa1-y)F6
IMA Formula:
NaCaCeF6

Crystallography of Gagarinite-(Ce)Hide

Crystal System:
Trigonal

Type Occurrence of Gagarinite-(Ce)Hide

Synonyms of Gagarinite-(Ce)Hide

Other Language Names for Gagarinite-(Ce)Hide

Related Minerals - Nickel-Strunz GroupingHide

3.AB.FluorocronitePbF2Iso. m3m (4/m 3 2/m) : Fm3m
3.AB.05TolbachiteCuCl2Mon.
3.AB.10CocciniteHgI2Tet.
3.AB.15SellaiteMgF2Tet. 4/mmm (4/m 2/m 2/m) : P42/mnm
3.AB.20ChloromagnesiteMgCl2Hex.
3.AB.20Lawrencite(Fe2+,Ni)Cl2Trig. 3m (3 2/m) : R3m
3.AB.20ScacchiteMnCl2Trig. 3m (3 2/m) : R3m
3.AB.25FluoriteCaF2Iso. m3m (4/m 3 2/m) : Fm3m
3.AB.25FrankdicksoniteBaF2Iso. m3m (4/m 3 2/m) : Fm3m
3.AB.25StrontiofluoriteSrF2Iso. m3m (4/m 3 2/m) : Fm3m
3.AB.30Tveitite-(Y)(Y, Na)6Ca6Ca6F42Trig. 3 : R3
3.AB.35Gagarinite-(Y)NaCaYF6Hex. 6/m : P63/m
3.AB.35Polezhaevaite-(Ce)NaSrCeF6Hex. 6/m : P63/m

Related Minerals - Dana Grouping (8th Ed.)Hide

11.5.6.1Gagarinite-(Y)NaCaYF6Hex. 6/m : P63/m
11.5.6.3Polezhaevaite-(Ce)NaSrCeF6Hex. 6/m : P63/m

Other InformationHide

Health Risks:
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)Hide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
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)Hide

Localities for Gagarinite-(Ce)Hide

This 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.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for 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 (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Canada (TL)
 
  • Québec & Newfoundland and Labrador
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.;
Mineral and/or Locality  
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