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Arrojadite-(PbFe) Mineral Data
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General Arrojadite-(PbFe) Information
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 Chemical Formula: |
PbFe++Na2Ca(Fe++,Mn,Mg)13Al(PO4)11(PO3OH)(OH,F)2 |
| Composition: |
Molecular Weight = 2,242.59 gm |
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Sodium 2.05 % Na 2.76 % Na2O |
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Calcium 1.79 % Ca 2.50 % CaO |
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Magnesium 1.08 % Mg 1.80 % MgO |
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Manganese 9.80 % Mn 12.65 % MnO |
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Aluminum 1.20 % Al 2.27 % Al2O3 |
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Iron 22.41 % Fe 28.83 % FeO |
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Phosphorus 16.57 % P 37.98 % P2O5 |
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Hydrogen 0.11 % H 1.00 % H2O |
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Lead 9.24 % Pb 9.95 % PbO |
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Oxygen 35.31 % O |
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Fluorine 0.42 % F 0.42 % F |
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- %
F -0.18 % -O=F2 |
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______ ______ |
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100.00 % 100.00 % = TOTAL OXIDE |
| Empirical Formula: |
PbFe2+Na2CaFe2+8Mn2+4MgAl(PO4)11(PO3OH)(OH)1.5F0.5 |
| Environment: |
Occurred with walnut-sized black grains of metamict � llowite. Arrojadite group |
| IMA Status: |
Approved IMA 2005 (Dana # Added) |
| Locality: |
Sapucaia pegmatite, Galilea, Rio Doce basin, Minas Gerais, Brazil Link to MinDat.org Location Data. |
| Name Origin: |
Named after arrojadite and site occupancy of the arrojadite structure. |
| Name Pronunciation: |
Arrojadite-(PbFe) + Pronunciation  |
| Synonym: |
IMA2005-056 |
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Arrojadite-(PbFe) Crystallography
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| Axial Ratios: |
a:b:c =1.6472:1:2.4649 |
| Cell Dimensions: |
a = 16.4304, b = 9.9745, c = 24.5869, Z = 4; beta = 105.485° V = 3,883.16 Den(Calc)= 3.84 |
| Crystal System: |
Monoclinic - Domatic H-M Symbol (m) Space Group: Cc |
| X Ray Diffraction: |
By Intensity(I/Io): 3.0186(1), 2.6982(0.548), 3.2082(0.431),2.8291(0.35), 2.8196(0.329), 2.6941(0.323), 2.5376(0.304), 2.7496(0.291), 2.8132(0.287), |
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Physical Properties of Arrojadite-(PbFe)
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| Color: |
Pale honey. |
| Diaphaneity: |
Transparent |
| Habit: |
Granular - Generally occurs as anhedral to subhedral crystals in matrix. |
| Hardness: |
4-5 - Fluorite-Apatite |
| Luster: |
Vitreous (Glassy) |
| Streak: |
white |
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Optical Properties of Arrojadite-(PbFe)
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| Gladstone-Dale: |
CI calc= 0.064 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1724,KC= 0.1843
Ncalc = 1.71 |
| Optical Data: |
Biaxial (+), a=1.6585, b=1.66, g=1.668, bire=0.0095, 2V(Calc)=48, 2V(Meas)=57.5. Dispersion r > v. |
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Calculated Properties of Arrojadite-(PbFe)
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| Electron Density: |
Bulk Density (Electron Density)=3.65 gm/cc
note: Specific Gravity of Arrojadite-(PbFe) =3.84 gm/cc.
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| Fermion Index: |
Fermion Index = 0.02
Boson Index = 0.98 |
| Photoelectric: |
PEArrojadite-(PbFe) = 159.73 barns/electron
U=PEArrojadite-(PbFe) x rElectron Density= 583.10 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Arrojadite-(PbFe) is Not Radioactive |
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Arrojadite-(PbFe) Classification
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| Dana Class: |
41.07.02a.07 (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-(PbFe) Information
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| References: |
NAME( AmMin, v91, p1270) PHYS. PROP.(AmMin, v91, p1270) OPTIC PROP.(AmMin, v91, p1270) |
| See Also: |
Links to other databases for Arrojadite-(PbFe) :
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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Arrojadite-(PbFe)
PbFe++Na2Ca(Fe++,Mn,Mg)13Al(PO4)11(PO3OH)(OH,F)2
Dana No: 41.07.02a.07 Strunz No: 08.BF.05
Locality:
Notes:
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