Gagarinite-(Y) Mineral Data

General Gagarinite-(Y) Information

Chemical Formula:

NaCaY(F,Cl)6

Composition:

Molecular Weight = 290.65 gm

Sodium 7.91 % Na 10.66 % Na₂O

Calcium 13.79 % Ca 19.29 % CaO

Yttrium 30.59 % Y 38.85 % Y₂O₃

Chlorine 18.30 % Cl 18.30 % Cl

- % Cl -4.13 % -O=Cl₂

Fluorine 29.41 % F 29.41 % F

- % F -12.39 % -O=F₂

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

NaCaYF_4.5Cl_1.5

Environment:

Found in alkaline rocks.

IMA Status:

Approved IMA 1961

Locality:

Kazakhstan Link to MinDat.org Location Data.

Name Origin:

Named after Yuri Alekseevich Gagarin (1934-1968), the first cosmonaut and the first person to travel in space.

Name Pronunciation:

Gagarinite-(Y) + Pronunciation

Synonym:

ICSD 39845

Nakalifite

PDF 15-69

Gagarinite-(Y) Image

Images:

Gagarinite-(Y)

Comments: Brownish to gray crystals of gagarinite-(Y) in matrix.
Location: Gjerdingen, Jevnaker, Oppland, Norway. Scale: Picture size 3 mm.
© Thomas Witzke / Abraxas-Verlag

Gagarinite-(Y) Crystallography

Axial Ratios:

a:c = 1:0.58931

Cell Dimensions:

a = 5.99, c = 3.53, Z = 1; V = 109.69 Den(Calc)= 4.40

Crystal System:

Trigonal - Rhombohedral H-M Symbol ( 3) Space Group: P 3

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 1.72(1), 2.09(0.9), 2.92(0.5),3(0.5), 1.13(0.3), 5.24(0.3), 1.96(0.2), 2.28(0.2),

Physical Properties of Gagarinite-(Y)

Cleavage:

{0001} Fair

Color:

Yellow, Cream white, Light brown, Pink.

Density:

4.21

Diaphaneity:

Transparent

Fracture:

Brittle - Generally displayed by glasses and most non-metallic minerals.

Habit:

Massive - Uniformly indistinguishable crystals forming large masses.

Hardness:

4.5 - Between Fluorite and Apatite

Luster:

Vitreous - Dull

Magnetism:

Slightly magnetic

Streak:

white

Optical Properties of Gagarinite-(Y)

Optical Data:

Uniaxial (+), w=1.472, e=1.492, bire=0.0200.

Calculated Properties of Gagarinite-(Y)

Electron Density:

Bulk Density (Electron Density)=4.12 gm/cc
note: Specific Gravity of Gagarinite-(Y) =4.40 gm/cc.

Fermion Index:

Fermion Index = 0.0001861557
Boson Index = 0.9998138443

Photoelectric:

PE_{Gagarinite-(Y)}= 41.66 barns/electron
U=PE_{Gagarinite-(Y)} x rElectron Density= 171.55 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Gagarinite-(Y) is Not Radioactive

Gagarinite-(Y) Classification

Dana Class:

11.05.06.01 (11)Halide Complexes; Alumino-fluorides

(11.05)where (A)m B (X)6

(11.05.06)Dana Group

11.05.06.01 Gagarinite-(Y) NaCaY(F,Cl)6 P 3 3

11.05.06.02 IMA2009-015 NaSrCeF6 P 6₃/m 6/m

Strunz Class:

03.AB.35 03 - HALIDES

03.A - Simple Halides, Without H2O

03.AB -M:X = 1:2

03.AB.35 Gagarinite-(Y) NaCaY(F,Cl)6 P 3 3

03.AB.35 Zajacite-(Ce) Na(REExCa1-x)(REEyCa1-y)F6where(xney) P 3 3

Other Gagarinite-(Y) Information

References:

NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Dana8)

See Also:

Links to other databases for Gagarinite-(Y) :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - GeoScienceWorld
5 - Google Images
6 - Google Scholar
7 - Handbook of Mineralogy (UofA)
8 - MinDAT
9 - Mineralienatlas (Deutsch)
10 - Online Mineral Museum
11 - QUT Mineral Atlas
12 - Ruff.Info
13 - WWW-MINCRYST

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Print or Cut-and-Paste your Gagarinite-(Y) Specimen Label here :

Gagarinite-(Y)

NaCaY(F,Cl)6
Dana No: 11.05.06.01 Strunz No: 03.AB.35
Locality:

Notes:

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