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Plumbojarosite

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Formula:
Pb0.5Fe3+3(SO4)2(OH)6
Colour:
Golden-brown to dark-brown, dark brown-red, blackish
Lustre:
Silky, Dull
Hardness:
1½ - 2
Specific Gravity:
3.665
Crystal System:
Trigonal
Name:
Named in 1902 for its composition with dominant lead (Latin = PLUMBum) and its relationship to JAROSITE.
Found as golden brown to dark brown crusts or masses composed of microscopic hexagonal plates; rarely as small crystals of variable morphologies (in slags blackish crystals often occur). May also be powdery, earthy, or ochreous.

May be confused with jarosite, natrojarosite, beudantite, corkite, beaverite-(Cu) and other members of the Alunite Supergroup.


Classification of Plumbojarosite

Approved, 'Grandfathered' (first described prior to 1959)
6/B.11-100
7.BC.10

7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
B : Sulfates (selenates, etc.) with additional anions, without H2O
C : With medium-sized and large cations
Dana 7th ed.:
30.2.5.6
30.2.5.6

30 : ANHYDROUS SULFATES CONTAINING HYDROXYL OR HALOGEN
2 : (AB)2(XO4)Zq
25.7.13

25 : Sulphates
7 : Sulphates of Pb

Physical Properties of Plumbojarosite

Silky, Dull
Transparency:
Translucent, Opaque
Comment:
May be glistening.
Colour:
Golden-brown to dark-brown, dark brown-red, blackish
Streak:
Pale yellow
Hardness:
1½ - 2 on Mohs scale
Hardness Data:
Measured
Tenacity:
Fragile
Cleavage:
Imperfect/Fair
Fair on {10_14}.
Fracture:
Micaceous
Density:
3.665 g/cm3 (Measured)    3.71 g/cm3 (Calculated)

Optical Data of Plumbojarosite

Type:
Uniaxial (-)
RI values:
nω = 1.878 nε = 1.783
Max Birefringence:
δ = 0.095
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Very High
Comments:
Dichroic:
O = Yellow-brown
E = Nearly colourless

Chemical Properties of Plumbojarosite

Formula:
Pb0.5Fe3+3(SO4)2(OH)6
IMA Formula:
PbFe3+6(SO4)4(OH)12

Crystallography of Plumbojarosite

Crystal System:
Trigonal
Class (H-M):
3m (3 2/m) - Hexagonal Scalenohedral
Space Group:
R3m
Cell Parameters:
a = 7.305 Å, c = 33.675 Å
Ratio:
a:c = 1 : 4.61
Unit Cell V:
1,556.25 ų (Calculated from Unit Cell)
Z:
3
Morphology:
crusts, lumps or compact masses composed of microscopic hexagonal plates; may be pulverant, earthy, or ocherous.

The presence of Pb2+ results in the "c" axis of the hexagonal cell being doubled in comparison to jarosite, with half the Pb sites vacant in an orderly arrangement; and this also results in other minor compensating differences from the jarosite structure.
Comment:
c may be halved due to impurity contents

X-Ray Powder Diffraction

Powder Diffraction Data:
d-spacingIntensity
3.06(100)
2.81(50)
2.53(30)
2.25(80)
1.975(30)
1.827(30)
1.532(30)
1.487(40)

Type Occurrence of Plumbojarosite

Synonyms of Plumbojarosite

Other Language Names for Plumbojarosite

Simplified Chinese:铅铁矾
黄铅铁矾
Traditional Chinese:鉛鐵礬
黃鉛鐵礬

Relationship of Plumbojarosite to other Species

Other Members of this group:
AluniteKAl3(SO4)2(OH)6
Ammonioalunite(NH4)Al3(SO4)2(OH)6
Ammoniojarosite(NH4)Fe3+3(SO4)2(OH)6
ArgentojarositeAgFe3+3(SO4)2(OH)6
Beaverite-(Cu)Pb(Fe3+2Cu)(SO4)2(OH)6
Beaverite-(Zn)Pb(Fe3+2Zn)(SO4)2(OH)6
DorallchariteTlFe3+3(SO4)2(OH)6
HuangiteCa0.5Al3(SO4)2(OH)6
Hydroniumjarosite(H3O)Fe3+3(SO4)2(OH)6
JarositeKFe3+ 3(SO4)2(OH)6
NatroaluniteNaAl3(SO4)2(OH)6
Natroalunite-2c(Na,Ca0.5,K)Al3(SO4)2(OH)6
NatrojarositeNaFe3(SO4)2(OH)6
OsarizawaitePb(Al2Cu2+)(SO4)2(OH)6
Schlossmacherite(H3O)Al3(SO4)2(OH)6
WalthieriteBa0.5Al3(SO4)2(OH)6

Common Associates

Associated Minerals Based on Photo Data:
Gypsum7 photos of Plumbojarosite associated with Gypsum on mindat.org.
Minium4 photos of Plumbojarosite associated with Minium on mindat.org.
Cuprite4 photos of Plumbojarosite associated with Cuprite on mindat.org.
Plumbogummite3 photos of Plumbojarosite associated with Plumbogummite on mindat.org.
Goethite2 photos of Plumbojarosite associated with Goethite on mindat.org.
Beaverite-(Cu)2 photos of Plumbojarosite associated with Beaverite-(Cu) on mindat.org.
Corkite2 photos of Plumbojarosite associated with Corkite on mindat.org.
Pyrolusite2 photos of Plumbojarosite associated with Pyrolusite on mindat.org.
Libethenite2 photos of Plumbojarosite associated with Libethenite on mindat.org.
Chukhrovite-(Ca)2 photos of Plumbojarosite associated with Chukhrovite-(Ca) on mindat.org.

Related Minerals - Nickel-Strunz Grouping

7.BC.05D'AnsiteNa21Mg(SO4)10Cl3
7.BC.10AluniteKAl3(SO4)2(OH)6
7.BC.10Ammonioalunite(NH4)Al3(SO4)2(OH)6
7.BC.10Ammoniojarosite(NH4)Fe3+3(SO4)2(OH)6
7.BC.10ArgentojarositeAgFe3+3(SO4)2(OH)6
7.BC.10Beaverite-(Cu)Pb(Fe3+2Cu)(SO4)2(OH)6
7.BC.10DorallchariteTlFe3+3(SO4)2(OH)6
7.BC.10HuangiteCa0.5Al3(SO4)2(OH)6
7.BC.10Hydroniumjarosite(H3O)Fe3+3(SO4)2(OH)6
7.BC.10JarositeKFe3+ 3(SO4)2(OH)6
7.BC.10Natroalunite-2c(Na,Ca0.5,K)Al3(SO4)2(OH)6
7.BC.10NatroaluniteNaAl3(SO4)2(OH)6
7.BC.10NatrojarositeNaFe3(SO4)2(OH)6
7.BC.10OsarizawaitePb(Al2Cu2+)(SO4)2(OH)6
7.BC.10Schlossmacherite(H3O)Al3(SO4)2(OH)6
7.BC.10WalthieriteBa0.5Al3(SO4)2(OH)6
7.BC.10Beaverite-(Zn)Pb(Fe3+2Zn)(SO4)2(OH)6
7.BC.15Ye'elimiteCa4Al6(SO4)O12
7.BC.20AtlasoviteK(BiO)Cu6Fe3+(SO4)5O3Cl
7.BC.20NabokoiteKCu7(SO4)5(Te4+O3)OCl
7.BC.25ChlorothioniteK2Cu(SO4)Cl2
7.BC.30EuchlorineKNaCu3(SO4)3O
7.BC.30FedotoviteK2Cu3(SO4)3O
7.BC.35KamchatkiteKCu3(SO4)2OCl
7.BC.40PiypiteK4Cu4O2(SO4)4 · (Na,Cu)Cl
7.BC.45KlyuchevskiteK3Cu3(Fe3+,Al)(SO4)4O2
7.BC.45AlumoklyuchevskiteK3Cu3(Al,Fe3+)(SO4)4O2
7.BC.50CaledonitePb5Cu2(SO4)3(CO3)(OH)6
7.BC.55WherryitePb7Cu2(SO4)4(SiO4)2(OH)2
7.BC.60MammothitePb6Cu4AlSb5+O2(OH)16Cl4(SO4)2
7.BC.65LinaritePbCu(SO4)(OH)2
7.BC.65SchmiederitePb2Cu2(Se6+O4)(Se4+O3)(OH)4
7.BC.65MunakataitePb2Cu2(Se4+O3)(SO4)(OH)4
7.BC.70ChenitePb4Cu(SO4)2(OH)6
7.BC.75KrivovichevitePb3Al(OH)6(SO4)(OH)
7.BC.80AnhydrokainiteKMg(SO4)Cl

Related Minerals - Hey's Chemical Index of Minerals Grouping

25.7.1SchaurteiteCa3Ge(SO4)2(OH)6 · 4H2O
25.7.2Zircosulfate(Zr,Ti)(SO4)2 · 4H2O
25.7.3AnglesitePbSO4
25.7.4LanarkitePb2(SO4)O
25.7.5Palmierite(K,Na)2Pb(SO4)2
25.7.6LinaritePbCu(SO4)(OH)2
25.7.7ElyitePb4Cu(SO4)O2(OH)4 · H2O
25.7.8ChenitePb4Cu(SO4)2(OH)6
25.7.9OsarizawaitePb(Al2Cu2+)(SO4)2(OH)6
25.7.10ItoitePb3Ge4+(SO4)2O2(OH)2
25.7.11FleischeritePb3Ge(SO4)2(OH)6 · 3H2O
25.7.12Beaverite-(Cu)Pb(Fe3+2Cu)(SO4)2(OH)6

Related Minerals - Dana Grouping (8th Ed.)

30.2.5.1JarositeKFe3+ 3(SO4)2(OH)6
30.2.5.4Ammoniojarosite(NH4)Fe3+3(SO4)2(OH)6
30.2.5.5ArgentojarositeAgFe3+3(SO4)2(OH)6
30.2.5.7Beaverite-(Cu)Pb(Fe3+2Cu)(SO4)2(OH)6
30.2.5.8DorallchariteTlFe3+3(SO4)2(OH)6
30.2.5.9Beaverite-(Zn)Pb(Fe3+2Zn)(SO4)2(OH)6

Other Information

Notes:
Very slowly soluble in acids.
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Plumbojarosite

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Hillebrand and Penfield (1902) American Journal of Science: 14: 211.
Hillebrand and Wright (1910) American Journal of Science: 30: 191.
Butler and Schaller (1911) American Journal of Science: 32: 422.
Knopf (1915) Journal of the Washington Academy of Sciences: 5: 497 (as Vegasite).
Larsen, E.S. (1921) The Microscopic Determination of the Nonopaque Minerals, First edition, USGS Bulletin 679: 121.
Hendricks (1937) American Mineralogist: 22: 773.
Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II. John Wiley and Sons, Inc., New York, 7th edition, revised and enlarged, 1124 pp.: 568-570.
Mumme, W. and Scott, T. (1966): The relationships between basic ferric sulfate and plumbojarosite. Am. Mineral. 51, 443-453.
Canadian Mineralogist (1985): 23: 659-668.
Gaines, Richard V., H. Catherine, W. Skinner, Eugene E. Foord, Brian Mason, Abraham Rosenzweig (1997), Dana's New Mineralogy : The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana: 635.
Mills, S. J., Madsen, I. C., Grey, I. E. & Birch, W. D. (2009) In situ XRD study of the thermal decomposition of arsenian plumbojarosite. Canadian Mineralogist, 47(3), 683–696.
Basciano, L. C. & Peterson, R. C. (2010): A crystallographic study of the incomplete solid solution betweeen plumbojarosite and jarosite. Can. Mineral. 48, 651-659.
Madsen, I. C., Grey, I. E. & Mills, S. J. (2010): In situ diffraction studies: Thermal decomposition of a natural plumbojarosite and the development of Rietveld-based data analysis techniques. Materials Science Forum, 651, 37-64.

Internet Links for Plumbojarosite

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https://www.mindat.org/min-3248.html
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Localities for Plumbojarosite

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