Plumbojarosite Mineral Data

Plumbojarosite Mineral Data +

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General Plumbojarosite Information

Chemical Formula:

PbFe+++6(SO4)4(OH)12

Composition:

Molecular Weight = 1,130.62 gm

Iron 29.64 % Fe 42.37 % Fe₂O₃

Hydrogen 1.07 % H 9.56 % H₂O

Lead 18.33 % Pb 19.74 % PbO

Sulfur 11.34 % S 28.33 % SO₃

Oxygen 39.62 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

PbFe³⁺₆(SO₄)₄(OH)₁₂

Environment:

Secondary mineral in the oxidized zone of lead-bearing ore deposits.

IMA Status:

Valid Species (Pre-IMA) 1902

Locality:

Cooks Pead district, Luna County, New Mexico. Link to MinDat.org Location Data.

Name Origin:

Named after its chemical composition (a variety of jarosite with Pb replacing K).

Synonym:

ICSD 64729

PDF 18-698

Plumbojarosite Image

Images:

Click Here for Larger Plumbojarosite Image

Plumbojarosite Galena

Comments: Yellow, earthy plumbojarosite on massive, gray galena.
Location: Quarry No 3, K?nigshain, Oberlausitz, Saxony, Germany. Scale: Picture size 4 mm.
© Thomas Witzke / Abraxas-Verlag

Plumbojarosite Crystallography

Axial Ratios:

a:c = 1:4.619

Cell Dimensions:

a = 7.315, c = 33.788, Z = 3; V = 1,565.75 Den(Calc)= 3.60

Crystal System:

Trigonal - Hexagonal ScalenohedralH-M Symbol (3 2/m) Space Group: R 3m

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

By Intensity(I/I_o): 3.066(1), 5.933(0.95), 1.829(0.7),

Crystal Structure:

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drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
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Szymanski J T , The Canadian Mineralogist , 23 (1985) p.659-668, The crystal structure of plumbojarosite Pb[Fe3(SO4)2(OH)6]2

Physical Properties of Plumbojarosite

Cleavage:

[0001] Distinct

Color:

Yellowish brown, Dark brown, Golden brown.

Density:

3.6 - 3.67, Average = 3.63

Diaphaniety:

Translucent to subtranslucent

Fracture:

Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.

Habit:

Concretionary - Rounded massive fine-grained materials.

Habit:

Tabular - Form dimensions are thin in one direction.

Hardness:

1.5-2 - Talc-Gypsum

Luminescence:

Non-fluorescent.

Luster:

Vitreous - Dull

Streak:

pale brown

Optical Properties of Plumbojarosite

Dichroism (e):

none.

Dichroism (w):

none.

Gladstone-Dale:

CI meas= 0.057 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= 0.048 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2307,KPDmeas= 0.2285,KC= 0.2424

Optical Data:

Uniaxial (-), e=1.783, w=1.878, bire=0.0950.

Calculated Properties of Plumbojarosite

Electron Density:

r_electron=3.43 gm/cc
note: r_{Plumbojarosite}=3.60 gm/cc.

Fermion Index

Fermion Index = 0.04782
Boson Index = 0.95218

Photoelectric:

PE_{Plumbojarosite}= 305.43 barns/electron
U=PE_{Plumbojarosite} x r_electron=1,046.41 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Plumbojarosite is Not Radioactive

Plumbojarosite Classification

Dana Class:

30.2.5.6 (30)Anhydrous Sulfates Containing Hydroxyl or Halogen

(30.2)where (A B)2 XO4 Zq

(30.2.5)Alunite Group (Jarosite Subgroup)

30.2.5.1 Jarosite KFe3(SO4)2(OH)6 R 3 3

30.2.5.2 Natrojarosite NaFe3(SO4)2(OH)6 R 3m 3m

30.2.5.3 Hydronium-jarosite (H3O)Fe3(SO4)2(OH)6 R 3m 3m

30.2.5.4 Ammoniojarosite (NH4)Fe3(SO4)2(OH)6 R 3m 3m

30.2.5.5 Argentojarosite AgFe3(SO4)2(OH)6 R 3m 3m

30.2.5.6 Plumbojarosite PbFe6(SO4)4(OH)12 R 3m 3 2/m

30.2.5.7 Beaverite PbCu(Fe,Al)2(SO4)2(OH)6 R 3m 3m

30.2.5.8 Dorallcharite (Tl,K)Fe3(SO4)2(OH)6 R 3m 3 2/m

Strunz Class:

VI/B.11-100 VI - Sulfates,Chromates,Molybdates and Tungstates

VI/B - Waterfree sulfates [SO4]2- with unfamiliar anions. mostly big cations

VI/B.11 - Alunite group, Natroalunite - Jarosite - Beaverite

VI/B.11-10 Natroalunite NaAl3(SO4)2(OH)6 R 3m 3 2/m

VI/B.11-20 Alunite KAl3(SO4)2(OH)6 R 3m, R 3m Trig

VI/B.11-30 Ammonioalunite (NH4)Al3(SO4)2(OH)6 R 3m 3 2/m

VI/B.11-40 Minamiite (Na,Ca,K)Al3(SO4)2(OH)6 R 3m 3 2/m

VI/B.11-43 Huangite Ca0.5Al3(SO4)2(OH)6 R 3m 3 2/m

VI/B.11-45 Walthierite Ba0.5Al3(SO4)2(OH)6 R 3m 3 2/m

VI/B.11-50 Natrojarosite NaFe3(SO4)2(OH)6 R 3m 3m

VI/B.11-60 Jarosite KFe3(SO4)2(OH)6 R 3 3

VI/B.11-65 Dorallcharite (Tl,K)Fe3(SO4)2(OH)6 R 3m 3 2/m

VI/B.11-70 Ammoniojarosite (NH4)Fe3(SO4)2(OH)6 R 3m 3m

VI/B.11-80 Hydronium-jarosite (H3O)Fe3(SO4)2(OH)6 R 3m 3m

VI/B.11-90 Argentojarosite AgFe3(SO4)2(OH)6 R 3m 3m

VI/B.11-100 Plumbojarosite PbFe6(SO4)4(OH)12 R 3m 3 2/m

VI/B.11-110 Osarizawaite PbCuAl2(SO4)2(OH)6 R 3m 3m

VI/B.11-120 Beaverite PbCu(Fe,Al)2(SO4)2(OH)6 R 3m 3m

Other Plumbojarosite Information

References:

NAME( MinRec) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Ford32)

See Also:

Links to other databases for Plumbojarosite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - Crocoite.com Mineral Locations 4 - EUROmin Project 5 -Google Images 6 -Google Scholar 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 - WWW-MINCRYST 13 -École des Mines de Paris

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Print or Cut-and-Paste your Plumbojarosite Specimen Label here :

Plumbojarosite

PbFe+++6(SO4)4(OH)12
Dana No: 30.2.5.6 Strunz No: VI/B.11-100
Locality:

Notes: