Arrojadite-(KFe) Mineral Data

Arrojadite-(KFe) Mineral Data
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General Arrojadite-(KFe) Information

Help on Chemical Formula: Chemical Formula: KNa2CaNa2(Fe++,Mn,Mg)13Al(PO4)11(PO3OH)(OH,F)2
Help on Composition: Composition: Molecular Weight = 2,033.08 gm
   Potassium    1.92 %  K     2.32 % K2O
   Sodium       4.52 %  Na    6.10 % Na2O
   Calcium      1.97 %  Ca    2.76 % CaO
   Magnesium    2.39 %  Mg    3.96 % MgO
   Manganese   10.81 %  Mn   13.96 % MnO
   Aluminum     1.33 %  Al    2.51 % Al2O3
   Iron        19.23 %  Fe   24.74 % FeO
   Phosphorus  18.28 %  P    41.89 % P2O5
   Hydrogen     0.12 %  H     1.11 % H2O
   Oxygen      38.95 %  O
   Fluorine     0.47 %  F     0.47 % F
                 -   %   F    -0.20 % -O=F2    
              ______        ______ 
              100.00 %       99.61 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: KNa2CaNa2Fe2+7Mn2+4Mg2Al(PO4)11(PO3OH)(OH)1.5F0.5
Help on IMA Status: IMA Status: Not Submitted IMA (Dana # Added)
Help on Locality: Locality: (Nickel Plate Mine), Serra Branca, Paraiba, Brazil. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after arrojadite and site occupancy of the arrojadite structure.
Help on Name Pronunciation: Name Pronunciation: Arrojadite-(KFe) + Pronunciation Say ARROJADITE-(KFE)
 

Arrojadite-(KFe) Image

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Arrojadite-(KFe)

Comments: Greenish Gray, massive arrojadite-(KFe).
Location: Nickel Plate mine, Keystone District, Pennington County, South Dakota, USA. Scale: See Image.
© Rruff Database

Arrojadite-(KFe) Crystallography
Help on Crystal System: Crystal System: Monoclinic - DomaticH-M Symbol (m) Space Group: Cc
Click Here for Large Arrojadite-(KFe) Structure Window Crystal Structure:

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Moore P B , Araki T , Merlino S , Mellini M , Zanazzi P F , American Mineralogist , 66 (1981) p.1034-1049, The arrojadite-dickinsonite series, KNa4Ca(Fe,Mn)14Al(OH)2(PO4)12:, Crystal structure and crystal chemistry, sample NP, Locality: Nickel Plate mine, Keystone, South Dakota, USA

 

Optical Properties of Arrojadite-(KFe)

Help on Optical Data: Optical Data:
 

Calculated Properties of Arrojadite-(KFe)

Help on Fermion Index: Fermion Index: Fermion Index = 0.0066834548
Boson Index = 0.9933165452
Help on Photoelectric: Photoelectric: PEArrojadite-(KFe) = 10.02 barns/electron
U=PEArrojadite-(KFe) x relectron= . barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 26.90 (Gamma Ray American Petroleum Institute Units)
Concentration of Arrojadite-(KFe) per GRapi unit = 3.72 (%)

Estimated Radioactivity from Arrojadite-(KFe) - barely detectable

 

Arrojadite-(KFe) Classification
Help on Dana Class: Dana Class: 41.07.02a.02 (41)Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen
  (41.07)where (A B)m (XO4)4 Zq
  (41.07.02a)Arrojadite Group (Arrojadite Subgroup) (Al in Al site, OH in W site, Fe in M site)
 
41.07.02a.00 Arrojadite! KNa4CaMn4Fe10Al(PO4)12(OH,F)2 Cc m
 
41.07.02a.01 Arrojadite-(KNa)! KNa4Ca(Fe,Mn,Mg)13Al(PO4)11(PO3OH)(OH,F)2 Cc m
 
41.07.02a.02 Arrojadite-(KFe)! KNa2CaNa2(Fe,Mn,Mg)13Al(PO4)11(PO3OH)(OH,F)2 Cc m
 
41.07.02a.03 Arrojadite-(NaFe)! NaNa2CaNa2(Fe,Mn,Mg)13Al(PO4)11(PO3OH)(OH,F)2 Cc m
 
41.07.02a.04 Arrojadite-(BaNa)! BaFeNa2Ca(Fe,Mn,Mg)13Al(PO4)11(PO3OH)(OH,F)2 Cc m
 
41.07.02a.05 Arrojadite-(BaFe)! (Ba,K,Pb)Na3(Ca,Sr)(Fe,Mg,Mn)14Al(PO4)11(PO3OH)(OH,F)2 Cc m
 
41.07.02a.06 Arrojadite-(SrFe)! SrFeNa2Ca(Fe,Mn,Mg)13Al(PO4)11(PO3OH)(OH,F)2 Cc m
 
41.07.02a.07 Arrojadite-(PbFe)! PbFeNa2Ca(Fe,Mn,Mg)13Al(PO4)11(PO3OH)(OH,F)2 Cc m
Help on Strunz Class: 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 Arrojadite-(KFe) Information
Help on References: References: NAME( AmMin, v91, p1266)
Help on See Also: See Also: Links to other databases for Arrojadite-(KFe) :
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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Print or Cut-and-Paste your Arrojadite-(KFe) Specimen Label here :

Arrojadite-(KFe)

KNa2CaNa2(Fe++,Mn,Mg)13Al(PO4)11(PO3OH)(OH,F)2
Dana No: 41.07.02a.02 Strunz No: 08.BF.05
Locality:

 

Notes: