Fluorarrojadite-(BaFe) Mineral Data

General Fluorarrojadite-(BaFe) Information

Chemical Formula:

(Ba,K,Pb)Na3(Ca,Sr)(Fe++,Mg,Mn)14Al(PO4)11(PO3OH)(F,OH)2

Composition:

Molecular Weight = 2,116.63 gm

Potassium 0.55 % K 0.67 % K₂O

Barium 3.89 % Ba 4.35 % BaO

Sodium 3.26 % Na 4.39 % Na₂O

Calcium 1.89 % Ca 2.65 % CaO

Magnesium 4.59 % Mg 7.62 % MgO

Manganese 7.79 % Mn 10.05 % MnO

Aluminum 1.27 % Al 2.41 % Al₂O₃

Iron 21.11 % Fe 27.16 % FeO

Phosphorus 17.56 % P 40.24 % P₂O₅

Hydrogen 0.07 % H 0.64 % H₂O

Oxygen 36.66 % O

Fluorine 1.35 % F 1.35 % F

- % F -0.57 % -O=F₂

______ ______

100.00 % 100.94 % = TOTAL OXIDE

Empirical Formula:

Ba_0.6K_0.3CaNa₃Fe²⁺₈Mg₄Mn²⁺₃Al(PO₄)₁₁(PO₃OH)F_1.5(OH)_0.5

Environment:

Occurs as centimeter-sized darkgreen nodules, not unlike green apatite, in a quartz matrix.

IMA Status:

Approved IMA 2005 (Dana # Added)

Locality:

Sidi-bou-Kricha, Jebilet mountains, Marrakech province, Morocco Link to MinDat.org Location Data.

Name Origin:

Named as the fluorine analog of arrojadite and site occupancy of the fluorarrojadite structure.

Synonym:

IMA2005-058a

Fluorarrojadite-(BaFe) Crystallography

Axial Ratios:

a:b:c =1.6468:1:2.4592

Cell Dimensions:

a = 16.497, b = 10.0176, c = 24.6359, Z = 4; beta = 105.649° V = 3,920.42 Den(Calc)= 3.59

Crystal System:

Monoclinic - Domatic H-M Symbol (m) Space Group: Cc

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

By Intensity(I/I_o): 3.0312(1)(514), 3.0319(1)(424), 3.2108(0.475)(206), 2.5433(0.381)(226), 2.8413(0.341)(332), 2.7585(0.329)(331), 2.7595(0.329)(408), 3.4003(0.312)(116),

Physical Properties of Fluorarrojadite-(BaFe)

Color:

Dark yellowish green.

Diaphaneity:

Transparent

Hardness:

4-5 - Fluorite-Apatite

Luster:

Vitreous (Glassy)

Streak:

dark yellowish green

Optical Properties of Fluorarrojadite-(BaFe)

Gladstone-Dale:

CI calc= 0.004 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1876,KC= 0.1883
Ncalc = 1.68

Optical Data:

Biaxial (+), a=1.668, b=1.67, g=1.682, bire=0.0140, 2V(Calc)=46, 2V(Meas)=37. Dispersion dispersion not observed.

Calculated Properties of Fluorarrojadite-(BaFe)

Electron Density:

Bulk Density (Electron Density)=3.46 gm/cc
note: Specific Gravity of Fluorarrojadite-(BaFe) =3.59 gm/cc.

Fermion Index:

Fermion Index = 0.01
Boson Index = 0.99

Photoelectric:

PE_{Fluorarrojadite-(BaFe)}= 25.91 barns/electron
U=PE_{Fluorarrojadite-(BaFe)} x r_electron= 89.59 barns/cc.

Radioactivity:

GRapi = 7.71 (Gamma Ray American Petroleum Institute Units)
Concentration of Fluorarrojadite-(BaFe) per GRapi unit = 12.98 (%)

Estimated Radioactivity from Fluorarrojadite-(BaFe) - barely detectable

Fluorarrojadite-(BaFe) Classification

Dana Class:

41.07.02b.03 (41)Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen

(41.07)where (A B)m (XO4)4 Zq

(41.07.02b)Arrojadite Group (Fluorarrojadite Subgroup) (Al in Al site, F in W site, Fe in M site)

41.07.02b.01 Fluorarrojadite-(KNa)! KNa4Ca(Fe,Mn,Mg)13Al(PO4)11(PO3OH)(F,OH)2 Cc m

41.07.02b.02 Fluorarrojadite-(BaNa)! BaFeNa2Ca(Fe,Mn,Mg)13Al(PO4)11(PO3OH)(F,OH)2 Cc m

41.07.02b.03 Fluorarrojadite-(BaFe)! (Ba,K,Pb)Na3(Ca,Sr)(Fe,Mg,Mn)14Al(PO4)11(PO3OH)(F,OH)2 Cc m

Strunz Class:

08.BF.05 08 - PHOSPHATES, ARSENATES, VANADATES

08.B - Phosphates, etc. with Additional Anions, without H2O

08.BF -With medium-sized and large cations, (OH, etc.):RO4 < 0.5:1

08.BF.05 Arrojadite! KNa4CaMn4Fe10Al(PO4)12(OH,F)2 Cc m

08.BF.05 Dickinsonite! KNa4Ca(Mn,Fe)14Al(PO4)12(OH)2 Cc m

08.BF.05 Arrojadite-(BaFe)! (Ba,K,Pb)Na3(Ca,Sr)(Fe,Mg,Mn)14Al(PO4)11(PO3OH)(OH,F)2 Cc m

08.BF.05 Arrojadite-(KFe)! KNa2CaNa2(Fe,Mn,Mg)13Al(PO4)11(PO3OH)(OH,F)2 Cc m

08.BF.05 Arrojadite-(NaFe)! NaNa2CaNa2(Fe,Mn,Mg)13Al(PO4)11(PO3OH)(OH,F)2 Cc m

08.BF.05 Arrojadite-(SrFe)! SrFeNa2Ca(Fe,Mn,Mg)13Al(PO4)11(PO3OH)(OH,F)2 Cc m

08.BF.05 Arrojadite-(KNa)! KNa4Ca(Fe,Mn,Mg)13Al(PO4)11(PO3OH)(OH,F)2 Cc m

08.BF.05 Dickinsonite-(KNa)! KNa4Ca(Mn,Fe,Mg)13Al(PO4)11(PO4)(OH,F)2 Cc m

08.BF.05 Arrojadite-(PbFe)! PbFeNa2Ca(Fe,Mn,Mg)13Al(PO4)11(PO3OH)(OH,F)2 Cc m

08.BF.05 Fluorarrojadite-(BaNa)! BaFeNa2Ca(Fe,Mn,Mg)13Al(PO4)11(PO3OH)(F,OH)2 Cc m

08.BF.05 Arrojadite-(BaNa)! BaFeNa2Ca(Fe,Mn,Mg)13Al(PO4)11(PO3OH)(OH,F)2 Cc m

08.BF.05 Fluorarrojadite-(KNa)! KNa4Ca(Fe,Mn,Mg)13Al(PO4)11(PO3OH)(F,OH)2 Cc m

08.BF.05 Fluorarrojadite-(BaFe)! (Ba,K,Pb)Na3(Ca,Sr)(Fe,Mg,Mn)14Al(PO4)11(PO3OH)(F,OH)2 Cc m

08.BF.05 Ferri-arrojadite-(BaNa)! BaFeNa2Ca(Fe,Mn,Mg)13Al(PO4)11(PO3OH)(F,OH)2 Cc m

08.BF.05 Dickinsonite-(KMnNa)! KNaMnNa3Ca(Mn,Fe,Mg)13Al(PO4)11(PO4)(OH,F)2 Cc m

08.BF.05 Dickinsonite-(KNaNa)! KNaNa4Ca(Mn,Fe,Mg)13Al(PO4)11(PO4)(OH,F)2 Cc m

08.BF.05 Dickinsonite-(NaNa)! Na2Na4Ca(Mn,Fe,Mg)13Al(PO4)11(PO4)(OH,F)2 Cc m

Other Fluorarrojadite-(BaFe) Information

References:

NAME( AmMin, v91, p1270) PHYS. PROP.(AmMin, v91, p1270) OPTIC PROP.(AmMin, v91, p1270)

See Also:

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

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Fluorarrojadite-(BaFe)

(Ba,K,Pb)Na3(Ca,Sr)(Fe++,Mg,Mn)14Al(PO4)11(PO3OH)(F,OH)2
Dana No: 41.07.02b.03 Strunz No: 08.BF.05
Locality:

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