Galileiite Mineral Data

General Galileiite Information

Chemical Formula:

NaFe++4(PO4)3

Composition:

Molecular Weight = 531.29 gm

Sodium 4.33 % Na 5.83 % Na₂O

Iron 42.05 % Fe 54.09 % FeO

Phosphorus 17.49 % P 40.08 % P₂O₅

Oxygen 36.14 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

NaFe²⁺₄(PO₄)₃

Environment:

In troilite nodules found in meteorites.

IMA Status:

Approved IMA 1997 (Dana # Added)

Locality:

Meteorites Grant IIIB, in the Zuni Mountains, New Mexico, USA; El Sampal IIIA, Argentina: Mount Edith IIIB, western Australia. Link to MinDat.org Location Data.

Name Origin:

For Galileo Galilei (1564-1642), Italian astronomer and physicist.

Name Pronunciation:

Galileiite + Pronunciation

Synonym:

IMA1996-028

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Galileiite Crystallography

Axial Ratios:

a:c = 1:2.78104

Cell Dimensions:

a = 14.98, c = 41.66, Z = 35; V = 8,096.06 Den(Calc)= 3.81

Crystal System:

Trigonal - RhombohedralH-M Symbol ( 3) Space Group: R 3

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

By Intensity(I/I_o): 2.71(1), 3.01(0.9), 4.13(0.8),

Physical Properties of Galileiite

Cleavage:

None

Color:

Very pale amber brown.

Density:

3.91

Diaphaneity:

Transparent

Fracture:

Sectile - Curved shavings or scrapings produced by a knife blade, (e.g. graphite).

Habit:

Microscopic Crystals - Crystals visible only with microscopes.

Hardness:

4 - Fluorite

Luster:

Waxy

Streak:

white

Optical Properties of Galileiite

Gladstone-Dale:

CI meas= -0.01 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.037 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1929,KPDmeas= 0.188,KC= 0.1861
Ncalc = 1.71 - 1.73

Optical Data:

Uniaxial (+), w=1.72, e=1.75, bire=0.0300.

Calculated Properties of Galileiite

Electron Density:

Bulk Density (Electron Density)=3.77 gm/cc
note: Specific Gravity of Galileiite =3.91 gm/cc.

Fermion Index:

Fermion Index = 0.0090872505
Boson Index = 0.9909127495

Photoelectric:

PE_Galileiite= 13.59 barns/electron
U=PE_Galileiite x rElectron Density= 51.20 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Galileiite is Not Radioactive

Galileiite Classification

Dana Class:

38.02.05.04 (38)Anhydrous Phosphates, etc

(38.02)(A+ B++)5 (XO4)3

(38.02.05)Fillowite Group

38.02.05.01 Fillowite Na2Ca(Mn,Fe)7(PO4)6 R 3 3

38.02.05.02 Johnsomervilleite Na2Ca(Mg,Fe,Mn)7(PO4)6 R 3 3

38.02.05.03 Chladniite Na2Ca(Mg,Fe)7(PO4)6 R 3 3

38.02.05.04 Galileiite! NaFe4(PO4)3 R 3 3

38.02.05.05 Xenophyllite! Na4Fe7(PO4)6 P1 or P1 Tri

38.02.05.06 Stornesite-(Y)! (Y,Ca)[]2Na6(Ca,Na)8(Mg,Fe)43(PO4)36 R 3 3

Strunz Class:

08.AC.50 08 - PHOSPHATES, ARSENATES, VANADATES

08.A - Phosphates, etc. without additional anions, without H2O

08.AC -With medium-sized and large cations

08.AC.50 Fillowite Na2Ca(Mn,Fe)7(PO4)6 R 3 3

08.AC.50 Chladniite Na2Ca(Mg,Fe)7(PO4)6 R 3 3

08.AC.50 Johnsomervilleite Na2Ca(Mg,Fe,Mn)7(PO4)6 R 3 3

08.AC.50 Galileiite! NaFe4(PO4)3 R 3 3

08.AC.50 Stornesite-(Y)! (Y,Ca)[]2Na6(Ca,Na)8(Mg,Fe)43(PO4)36 R 3 3

08.AC.50 Xenophyllite! Na4Fe7(PO4)6 P1 or P1 Tri

Other Galileiite Information

References:

NAME( MinRec) PHYS. PROP.(Am.Min.,Vol.83,p185,1998) OPTIC PROP.(MinRec)

See Also:

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

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Ask about Galileiite 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 Galileiite Specimen Label here :

Galileiite

NaFe++4(PO4)3
Dana No: 38.02.05.04 Strunz No: 08.AC.50
Locality:

Notes: