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Arrojadite-(KFe) Mineral Data
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General Arrojadite-(KFe) Information
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Chemical Formula: |
KNa2CaNa2(Fe++,Mn,Mg)13Al(PO4)11(PO3OH)(OH,F)2 |
Composition: |
Molecular Weight = 2,033.08 gm |
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Potassium 1.92 % K 2.32 % K2O |
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Sodium 4.52 % Na 6.10 % Na2O |
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Calcium 1.97 % Ca 2.76 % CaO |
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Magnesium 2.39 % Mg 3.96 % MgO |
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Manganese 10.81 % Mn 13.96 % MnO |
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Aluminum 1.33 % Al 2.51 % Al2O3 |
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Iron 19.23 % Fe 24.74 % FeO |
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Phosphorus 18.28 % P 41.89 % P2O5 |
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Hydrogen 0.12 % H 1.11 % H2O |
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Oxygen 38.95 % O |
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Fluorine 0.47 % F 0.47 % F |
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- %
F -0.20 % -O=F2 |
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______ ______ |
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100.00 % 99.61 % = TOTAL OXIDE |
Empirical Formula: |
KNa2CaNa2Fe2+7Mn2+4Mg2Al(PO4)11(PO3OH)(OH)1.5F0.5 |
IMA Status: |
Not Submitted IMA (Dana # Added) |
Locality: |
(Nickel Plate Mine), Serra Branca, Paraiba, Brazil. Link to MinDat.org Location Data. |
Name Origin: |
Named after arrojadite and site occupancy of the arrojadite structure. |
Name Pronunciation: |
Arrojadite-(KFe) + Pronunciation |
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Arrojadite-(KFe) Image |
Images:
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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 |
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Arrojadite-(KFe) Crystallography
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Crystal System: |
Monoclinic - Domatic H-M Symbol (m) Space Group: Cc |
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Optical Properties of Arrojadite-(KFe)
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Optical Data: |
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Calculated Properties of Arrojadite-(KFe)
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Fermion Index: |
Fermion Index = 0.0066834548 Boson Index = 0.9933165452 |
Photoelectric: |
PEArrojadite-(KFe) = 10.02 barns/electron U=PEArrojadite-(KFe) x relectron= . barns/cc. |
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
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Arrojadite-(KFe) Classification
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Dana Class: |
41.07.02a.02 (41)Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen |
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(41.07)where (A B)m (XO4)4 Zq |
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(41.07.02a)Arrojadite Group (Arrojadite Subgroup) (Al in Al site, OH in W site, Fe in M site) |
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41.07.02a.00 Arrojadite! KNa4CaMn4Fe10Al(PO4)12(OH,F)2 Cc m |
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41.07.02a.01 Arrojadite-(KNa)! KNa4Ca(Fe,Mn,Mg)13Al(PO4)11(PO3OH)(OH,F)2 Cc m |
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41.07.02a.02 Arrojadite-(KFe)! KNa2CaNa2(Fe,Mn,Mg)13Al(PO4)11(PO3OH)(OH,F)2 Cc m |
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41.07.02a.03 Arrojadite-(NaFe)! NaNa2CaNa2(Fe,Mn,Mg)13Al(PO4)11(PO3OH)(OH,F)2 Cc m |
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41.07.02a.04 Arrojadite-(BaNa)! BaFeNa2Ca(Fe,Mn,Mg)13Al(PO4)11(PO3OH)(OH,F)2 Cc m |
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41.07.02a.05 Arrojadite-(BaFe)! (Ba,K,Pb)Na3(Ca,Sr)(Fe,Mg,Mn)14Al(PO4)11(PO3OH)(OH,F)2 Cc m |
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41.07.02a.06 Arrojadite-(SrFe)! SrFeNa2Ca(Fe,Mn,Mg)13Al(PO4)11(PO3OH)(OH,F)2 Cc m |
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41.07.02a.07 Arrojadite-(PbFe)! PbFeNa2Ca(Fe,Mn,Mg)13Al(PO4)11(PO3OH)(OH,F)2 Cc m |
Strunz Class: |
08.BF.05 08 - PHOSPHATES, ARSENATES, VANADATES |
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08.B - Phosphates, etc. with Additional Anions, without H2O |
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08.BF -With medium-sized and large cations, (OH, etc.):RO4 < 0.5:1 |
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08.BF.05 Arrojadite! KNa4CaMn4Fe10Al(PO4)12(OH,F)2 Cc m |
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08.BF.05 Dickinsonite! KNa4Ca(Mn,Fe)14Al(PO4)12(OH)2 Cc m |
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08.BF.05 Arrojadite-(BaFe)! (Ba,K,Pb)Na3(Ca,Sr)(Fe,Mg,Mn)14Al(PO4)11(PO3OH)(OH,F)2 Cc m |
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08.BF.05 Arrojadite-(KFe)! KNa2CaNa2(Fe,Mn,Mg)13Al(PO4)11(PO3OH)(OH,F)2 Cc m |
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08.BF.05 Arrojadite-(NaFe)! NaNa2CaNa2(Fe,Mn,Mg)13Al(PO4)11(PO3OH)(OH,F)2 Cc m |
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08.BF.05 Arrojadite-(SrFe)! SrFeNa2Ca(Fe,Mn,Mg)13Al(PO4)11(PO3OH)(OH,F)2 Cc m |
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08.BF.05 Arrojadite-(KNa)! KNa4Ca(Fe,Mn,Mg)13Al(PO4)11(PO3OH)(OH,F)2 Cc m |
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08.BF.05 Dickinsonite-(KNa)! KNa4Ca(Mn,Fe,Mg)13Al(PO4)11(PO4)(OH,F)2 Cc m |
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08.BF.05 Arrojadite-(PbFe)! PbFeNa2Ca(Fe,Mn,Mg)13Al(PO4)11(PO3OH)(OH,F)2 Cc m |
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08.BF.05 Fluorarrojadite-(BaNa)! BaFeNa2Ca(Fe,Mn,Mg)13Al(PO4)11(PO3OH)(F,OH)2 Cc m |
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08.BF.05 Arrojadite-(BaNa)! BaFeNa2Ca(Fe,Mn,Mg)13Al(PO4)11(PO3OH)(OH,F)2 Cc m |
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08.BF.05 Fluorarrojadite-(KNa)! KNa4Ca(Fe,Mn,Mg)13Al(PO4)11(PO3OH)(F,OH)2 Cc m |
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08.BF.05 Fluorarrojadite-(BaFe)! (Ba,K,Pb)Na3(Ca,Sr)(Fe,Mg,Mn)14Al(PO4)11(PO3OH)(F,OH)2 Cc m |
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08.BF.05 Ferri-arrojadite-(BaNa)! BaFeNa2Ca(Fe,Mn,Mg)13Al(PO4)11(PO3OH)(F,OH)2 Cc m |
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08.BF.05 Dickinsonite-(KMnNa)! KNaMnNa3Ca(Mn,Fe,Mg)13Al(PO4)11(PO4)(OH,F)2 Cc m |
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08.BF.05 Dickinsonite-(KNaNa)! KNaNa4Ca(Mn,Fe,Mg)13Al(PO4)11(PO4)(OH,F)2 Cc m |
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08.BF.05 Dickinsonite-(NaNa)! Na2Na4Ca(Mn,Fe,Mg)13Al(PO4)11(PO4)(OH,F)2 Cc m |
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Other Arrojadite-(KFe) Information
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References: |
NAME( AmMin, v91, p1266) |
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:
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