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Gagarinite-(Y)

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Yurii Alexeevich Gagarin - the first man visited space.
Formula:
NaCaYF6
Colour:
Creamy, yellowish, pink.
Lustre:
Vitreous, Dull
Hardness:
Specific Gravity:
4.11 - 4.29
Crystal System:
Hexagonal
Name:
For Yuri Alexeevich Gagarin (1934-1968), the first cosmonaut.
Y-analogue of gagarinite-(Ce) and CaY-analogue of polezhaevaite-(Ce).


Hide all sections | Show all sections

Classification of Gagarinite-(Y)Hide

Approved
3.AB.35

3 : HALIDES
A : Simple halides, without H2O
B : M:X = 1:2
11.5.6.1

11 : HALIDE COMPLEXES
5 : AmBX6
8.7.4

8 : Halides - Fluorides, Chlorides, Bromides and Iodides; also Fluoborates and Fluosilicates
7 : Halides of the rare earth metals

Physical Properties of Gagarinite-(Y)Hide

Vitreous, Dull
Transparency:
Transparent, Translucent
Colour:
Creamy, yellowish, pink.
Streak:
White
Hardness:
4½ on Mohs scale
Hardness:
VHN100=367 - 372 - Vickers
Tenacity:
Brittle
Cleavage:
Distinct/Good
Distinct in one direction, prismatic
Density:
4.11 - 4.29 g/cm3 (Measured)    4.27 g/cm3 (Calculated)

Optical Data of Gagarinite-(Y)Hide

Type:
Uniaxial (+)
RI values:
nω = 1.472 - 1.475 nε = 1.490 - 1.493
2V:
Measured: 20°
Max Birefringence:
δ = 0.018
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate
Comments:
May be anomalously biaxial

Chemical Properties of Gagarinite-(Y)Hide

Formula:
NaCaYF6

Crystallography of Gagarinite-(Y)Hide

Crystal System:
Hexagonal
Class (H-M):
6/m - Dipyramidal
Space Group:
P63/m
Cell Parameters:
a = 5.987(2) Å, c = 3.5413(7) Å
Ratio:
a:c = 1 : 0.591
Unit Cell V:
109.93 ų (Calculated from Unit Cell)
Z:
1
Morphology:
Short and long prismatic hexagonal crystals, irregular grains, aggregates

Type Occurrence of Gagarinite-(Y)Hide

Synonyms of Gagarinite-(Y)Hide

Other Language Names for Gagarinite-(Y)Hide

Common AssociatesHide

Riebeckite◻[Na2][Fe2+3Fe3+2]Si8O22(OH)2
ZirconZr(SiO4)
Associated Minerals Based on Photo Data:
Thomsenolite6 photos of Gagarinite-(Y) associated with Thomsenolite on mindat.org.
Cryolite5 photos of Gagarinite-(Y) associated with Cryolite on mindat.org.
Quartz4 photos of Gagarinite-(Y) associated with Quartz on mindat.org.
Annite4 photos of Gagarinite-(Y) associated with Annite on mindat.org.
Riebeckite2 photos of Gagarinite-(Y) associated with Riebeckite on mindat.org.
Monazite-(Ce)1 photo of Gagarinite-(Y) associated with Monazite-(Ce) on mindat.org.
Aegirine1 photo of Gagarinite-(Y) associated with Aegirine on mindat.org.
Bastnäsite-(Y)1 photo of Gagarinite-(Y) associated with Bastnäsite-(Y) on mindat.org.

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-(Ce)Na(REExCa1-x)(REEyCa1-y)F6Trig.
3.AB.35Polezhaevaite-(Ce)NaSrCeF6Hex. 6/m : P63/m

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

11.5.6.2Gagarinite-(Ce)Na(REExCa1-x)(REEyCa1-y)F6Trig.
11.5.6.3Polezhaevaite-(Ce)NaSrCeF6Hex. 6/m : P63/m

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

8.7.1Fluocerite-(Ce)(Ce,La)F3Trig. 3m (3 2/m) : P3c1
8.7.2Fluocerite-(La)(La,Ce)F3Trig. 3m (3 2/m) : P3c1
8.7.3Tveitite-(Y)(Y, Na)6Ca6Ca6F42Trig. 3 : R3

Other InformationHide

Notes:
Weakly magnetic
Special Storage/
Display Requirements:
Decomposed by water
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-(Y)Hide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
American Mineralogist: 47: 805.
Doklady Akademii Nauk SSSR: 141: 954-957.
Doklady of the Academy of Sciences of the USSR, Earth Science Sections: 141: 1290-1293.
Canadian Mineralogist: 32: 563-565.

Internet Links for Gagarinite-(Y)Hide

Localities for Gagarinite-(Y)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.
Brazil
 
  • Amazonas
    • Presidente Figueiredo
      • Pitinga mine
A. C. Bastos Neto, V. P. Pereira, L. H. Ronchi, E. F. de Lima and J. C. Frantz (2009): The world-class Sn, Nb, Ta, F (Y, REE, Li) deposit and the massive cryolite associated with the albite-enriched facies of the Madeira A-type granite, Pitinga mining district, Amazonas State, Brazil. Canadian Mineralogist 47, 1329-1357.
Canada
 
  • Québec & Newfoundland and Labrador
Miller (1996), Canadian Mineralogist: 34:349-371; Salvi & Williams-Jones (1995); Am.Min.: 80:1031-1040; Miller (1990), Newfoundland Dept. of Mines & Energy Geol. Sur. Report 90-1: 171-182.; A. Kerr and H. Rafuse (2012) Rare-earth element (REE) geochemistry of the Strange Lake deposits: Implications for resource estimation and metallogenic models. Newfoundland and Labrador Department of Natural Resources Current Research 2012 pp39-60; BIRKETT, T.C., MILLER, R.R., ROBERTS, A.C., & MARIANO, A.N. (1992) Zirconium bearing minerals from the Strange Lake intrusive complex, Quebec Labrador. Canadian Mineralogist, 30, 191-205.
Kazakhstan (TL)
 
  • Eastern Kazakhstan Province (Shyghys Qazaqstan Oblysy; Vostochno-Kazakhstanskaya Oblast')
    • Tarbagatai Range
      • Akzhaylyautas Mts (Akzhailyautas Mts; Akjaylautas Mts; Akzhalautas Mts)
DAN-SSSR,(1961) 141, 954-957; Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow; Bailey, J. C: Formation of cryolite and other aluminofluorides: A petrologic review. Bull. geol. Soc. Denmark, vol. 29, pp. 1-45. Copenhagen, June 10th, 1980.
  • Karagandy Province (Qaragandy Oblysy; Karaganda Oblast')
Norway
 
  • Oppland
    • Lunner
      • Nordmarka
Raade, G & Haug, J. (1980): Rare Fluorides from a soda granite in the Oslo Region, Norway. Mineralogical Record, 11,83-91
Russia
 
  • Eastern-Siberian Region
    • Prebaikalia (Pribaikal'e)
      • Buriatia (Buryatia)
        • Mama River Basin
          • Maigunda River
Bailey, J. C: Formation of cryolite and other aluminofluorides: A petrologic review. Bull. geol. Soc. Denmark, vol. 29, pp. 1-45. Copenhagen, June 10th, 1980.
    • Transbaikalia (Zabaykalye)
      • Chitinskaya Oblast'
Seltmann, R., Soloviev, S., Shatov, V., Pirajno, F., Naumov, E., & Cherkasov, S. (2010). Metallogeny of Siberia: tectonic, geologic and metallogenic settings of selected significant deposits*. Australian Journal of Earth Sciences, 57(6), 655-706; Sharygin, V. V., & Vladykin, N. V. (2014). Mineralogy of cryolite rocks from the Katugin massif, Transbaikalia, Russia. Abstract Book of 30th International Conference on “Ore Potential of Alkaline, Kimberlite and Carbonatite Magmatism,” Antalya, Turkey, 166-168.
    • Tuva Republic
no reference
Bailey, J. C: Formation of cryolite and other aluminofluorides: A petrologic review. Bull. geol. Soc. Denmark, vol. 29, pp. 1-45. Copenhagen, June 10th, 1980.
Seltmann, R., Soloviev, S., Shatov, V., Pirajno, F., Naumov, E., & Cherkasov, S. (2010). Metallogeny of Siberia: tectonic, geologic and metallogenic settings of selected significant deposits*. Australian Journal of Earth Sciences, 57(6), 655-706
Saudi Arabia
 
  • Mintaqah Tabuk
    • Midyan
Küster, D. (2009): Ore Geology Reviews 35, 68-86.
USA
 
  • Washington
    • Okanogan Co.
      • Golden Horn Batholith
Micro Probe Volume VI Number 8; Rocks and Minerals, 66:6, p. 454
Mineral and/or Locality  
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