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  

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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 - DomaticH-M Symbol (m) Space Group: Cc 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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