Gagarinite-(Y) Mineral Data

Gagarinite-(Y) Mineral Data +

[Mineral Auctions] [Register] [Current Auctions] [Log In] [www.danweinrich.com]
Dan Weinrich Auctions
Specializing In Live Weekly Auctions Of Top Quality Mineral Specimens
The Place To Find Great Specimens At Great Prices!

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.

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 - RhombohedralH-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),

Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
Help on Above

Hughes J M , Drexler J W , The Canadian Mineralogist , 32 (1994) p.563-565, Refinement of the structure of gagarinite-(Y), Nax(CaxREE2-x)F6

Physical Properties of Gagarinite-(Y)

Cleavage:

[0001] Fair

Color:

Yellow, Cream white, Light brown, Pink.

Density:

4.21

Diaphaniety:

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)

Gladstone-Dale:

CI meas= 0.423 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.448 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1095,KPDmeas= 0.1145,KC= 0.1985

Optical Data:

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

Calculated Properties of Gagarinite-(Y)

Electron Density:

r_electron=3.94 gm/cc
note: r_{Gagarinite-(Y)}=4.21 gm/cc.

Fermion Index

Fermion Index = 0.00018
Boson Index = 0.99982

Photoelectric:

PE_{Gagarinite-(Y)}= 41.66 barns/electron
U=PE_{Gagarinite-(Y)} x r_electron= 164.14 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Gagarinite-(Y) is Not Radioactive

Gagarinite-(Y) Classification

Dana Class:

11.5.6.1 (11)Halide Complexes; Alumino-fluorides

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

(11.5.6)Dana Group

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

Strunz Class:

III/A.08-40 III - Halogenides

III/A - Simple Halogenides, without water Metal : Halogen = 1 : 2, 1 : 3

III/A.08 - Fluorite series and related compounds

III/A.08-10 Fluorite CaF2 F m3m 4/m 3 2/m

III/A.08-20 Frankdicksonite BaF2 F m3m 4/m 3 2/m

III/A.08-25 Haleniusite-(La)! (La,Ce)OF F m3m 4/m 3 2/m

III/A.08-30 Tveitite-(Y) Ca1-xYxF2x,x~0.3 Unk Mono

III/A.08-40 Gagarinite-(Y) NaCaY(F,Cl)6 P 3 3

III/A.08-45 Zajacite-(Ce) Na(REExCa1-x)(REEyCa1-y)F6where(xney) P 3 3

III/A.08-50 Laurelite Pb7F12Cl2 P 6 6

III/A.08-60 Coccinite* HgI2(?) P 4₁/nmc 4/m 2/m 2/m

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 - Google Images
5 - Google Scholar
6 - Handbook of Mineralogy (UofA)
7 - MinDAT
8 - MinMax(Deutsch)
9 - MinMax(English)
10 - Mineralienatlas (Deutsch)
11 - QUT Mineral Atlas
12 - Ruff.Info
13 - WWW-MINCRYST

Search for Gagarinite-(Y) using:

[ALTAVISTA] [AOL] [All-The-Web] [HotBot] [Ixquick] [MAMMA] [MSN.COM] [Netscape] [Scirus] [Teoma] [Wikipedia] [YAHOO]

Visit our Advertisers for Gagarinite-(Y) :

AA Mineral Specimens

B & L Fine Minerals

Dan Weinrich Fine Minerals

Dan Weinrich Auctions

John Betts Fine Minerals

Mason's Minerals

Mineral News

Mineral of the Month Club

MineralsWeb Fine Minerals

The GeoZone

Wrights Rock Shop

Translate Gagarinite-(Y) Mineral Data :

Ask about Gagarinite-(Y) here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

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

Gagarinite-(Y)

NaCaY(F,Cl)6
Dana No: 11.5.6.1 Strunz No: III/A.08-40
Locality:

Notes: