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Plumbojarosite

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Formula:
Pb
 
0.5
Fe
3+
3
(SO
 
4
)
 
2
(OH)
 
6
System:TrigonalColour:Golden-brown to ...
Hardness:1½ - 2
Member of:Alunite Group > Alunite Supergroup
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

IMA status:Approved
Strunz 8th edition ID:6/B.11-100
Nickel-Strunz 10th (pending) edition ID: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 edition ID:30.2.5.6
Dana 8th edition ID:30.2.5.6

30 : ANHYDROUS SULFATES CONTAINING HYDROXYL OR HALOGEN
2 : (AB)2(XO4)Zq
Hey's CIM Ref.:25.7.13

25 : Sulphates
7 : Sulphates of Pb
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Type Occurrence of Plumbojarosite

Type Locality:Cooks Peak District (Cooke's Peak District), Luna Co., New Mexico, USA
Year of Discovery:1902

Occurrences of Plumbojarosite

Geological Setting:A secondary mineral found in the oxidized zones of lead mineral deposits, particularly in arid regions.

Physical Properties of Plumbojarosite

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

Crystallography of Plumbojarosite

Crystal System:Trigonal
Class (H-M):3m (3 2/m) - Hexagonal Scalenohedral
Space Group:R3m
Cell Parameters:a = 7.305Å, c = 33.675Å
Ratio:a:c = 1 : 4.61
Unit Cell Volume: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:
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)

Optical Data of Plumbojarosite

Type:Uniaxial (-)
RI values: nω = 1.878 nε = 1.783
Maximum Birefringence:δ = 0.095

Chart 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:
Pb
 
0.5
Fe
3+
3
(SO
 
4
)
 
2
(OH)
 
6
Simplified for copy/paste:Pb0.5Fe3+3(SO4)2(OH)6
Essential elements:Fe, H, O, Pb, S
All elements listed in formula:Fe, H, O, Pb, S

Relationship of Plumbojarosite to other Species

Member of:Alunite Group > Alunite Supergroup
Other Members of Group:

- +
Alunite
KAl
 
3
(SO
 
4
)
 
2
(OH)
 
6
Ammonioalunite
(NH
 
4
)Al
 
3
(SO
 
4
)
 
2
(OH)
 
6
Ammoniojarosite
(NH
 
4
)Fe
3+
3
(SO
 
4
)
 
2
(OH)
 
6
Argentojarosite
AgFe
3+
3
(SO
 
4
)
 
2
(OH)
 
6
Beaverite-(Cu)
Pb(Fe
3+
 
,Cu)
 
3
(SO
 
4
)
 
2
(OH)
 
6
Beaverite-(Zn)
Pb(Fe
3+
2
Zn)(SO
 
4
)
 
2
(OH)
 
6
Dorallcharite
(Tl,K)Fe
3+
3
(SO
 
4
)
 
2
(OH)
 
6
Huangite
Ca
 
0.5
Al
 
3
(SO
 
4
)
 
2
(OH)
 
6
Hydroniumjarosite
(H
 
3
O)Fe
3+
3
(SO
 
4
)
 
2
(OH)
 
6
Jarosite
KFe
3+
 
 
3
(SO
 
4
)
 
2
(OH)
 
6
Natroalunite
(Na,K)Al
 
3
(SO
 
4
)
 
2
(OH)
 
6
Natroalunite-2c
(Na,Ca
 
0.5
,K)Al
 
3
(SO
 
4
)
 
2
(OH)
 
6
Natrojarosite
NaFe
 
3
(SO
 
4
)
 
2
(OH)
 
6
Osarizawaite
Pb(Al,Cu)
 
3
(SO
 
4
)
 
2
(OH)
 
6
Schlossmacherite
(H
 
3
O)Al
 
3
(SO
 
4
)
 
2
(OH)
 
6
Walthierite
Ba
 
0.5
Al
 
3
(SO
 
4
)
 
2
(OH)
 
6
Related Minerals - Nickel-Strunz Grouping):

- +
7.BC.05D'Ansite
Na
 
21
Mg(SO
 
4
)
 
10
Cl
 
3
7.BC.10Alunite
KAl
 
3
(SO
 
4
)
 
2
(OH)
 
6
7.BC.10Ammonioalunite
(NH
 
4
)Al
 
3
(SO
 
4
)
 
2
(OH)
 
6
7.BC.10Ammoniojarosite
(NH
 
4
)Fe
3+
3
(SO
 
4
)
 
2
(OH)
 
6
7.BC.10Argentojarosite
AgFe
3+
3
(SO
 
4
)
 
2
(OH)
 
6
7.BC.10Beaverite-(Cu)
Pb(Fe
3+
 
,Cu)
 
3
(SO
 
4
)
 
2
(OH)
 
6
7.BC.10Dorallcharite
(Tl,K)Fe
3+
3
(SO
 
4
)
 
2
(OH)
 
6
7.BC.10Huangite
Ca
 
0.5
Al
 
3
(SO
 
4
)
 
2
(OH)
 
6
7.BC.10Hydroniumjarosite
(H
 
3
O)Fe
3+
3
(SO
 
4
)
 
2
(OH)
 
6
7.BC.10Jarosite
KFe
3+
 
 
3
(SO
 
4
)
 
2
(OH)
 
6
7.BC.10Natroalunite-2c
(Na,Ca
 
0.5
,K)Al
 
3
(SO
 
4
)
 
2
(OH)
 
6
7.BC.10Natroalunite
(Na,K)Al
 
3
(SO
 
4
)
 
2
(OH)
 
6
7.BC.10Natrojarosite
NaFe
 
3
(SO
 
4
)
 
2
(OH)
 
6
7.BC.10Osarizawaite
Pb(Al,Cu)
 
3
(SO
 
4
)
 
2
(OH)
 
6
7.BC.10Schlossmacherite
(H
 
3
O)Al
 
3
(SO
 
4
)
 
2
(OH)
 
6
7.BC.10Walthierite
Ba
 
0.5
Al
 
3
(SO
 
4
)
 
2
(OH)
 
6
7.BC.10Beaverite-(Zn)
Pb(Fe
3+
2
Zn)(SO
 
4
)
 
2
(OH)
 
6
7.BC.15Ye'elimite
Ca
 
4
Al
 
6
(SO
 
4
)O
 
12
7.BC.20Atlasovite
K(BiO)Cu
 
6
Fe
3+
 
(SO
 
4
)
 
5
O
 
3
Cl
7.BC.20Nabokoite
KCu
 
7
(SO
 
4
)
 
5
(Te
4+
 
O
 
3
)OCl
7.BC.25Chlorothionite
K
 
2
Cu(SO
 
4
)Cl
 
2
7.BC.30Euchlorine
KNaCu
 
3
(SO
 
4
)
 
3
O
7.BC.30Fedotovite
K
 
2
Cu
 
3
(SO
 
4
)
 
3
O
7.BC.35Kamchatkite
KCu
 
3
(SO
 
4
)
 
2
OCl
7.BC.40Piypite
K
 
2
Cu
 
2
(SO
 
4
)
 
2
O
7.BC.45Klyuchevskite
K
 
3
Cu
 
3
(Fe
3+
 
,Al)(SO
 
4
)
 
4
O
 
2
7.BC.45Alumoklyuchevskite
K
 
3
Cu
 
3
(Al,Fe
3+
 
)(SO
 
4
)
 
4
O
 
2
7.BC.50Caledonite
Pb
 
5
Cu
 
2
(SO
 
4
)
 
3
(CO
 
3
)(OH)
 
6
7.BC.55Wherryite
Pb
 
7
Cu
 
2
(SO
 
4
)
 
4
(SiO
 
4
)
 
2
(OH)
 
2
7.BC.60Mammothite
Pb
 
6
Cu
 
4
AlSb
5+
 
O
 
2
(OH)
 
16
Cl
 
4
(SO
 
4
)
 
2
7.BC.65Linarite
PbCu(SO
 
4
)(OH)
 
2
7.BC.65Schmiederite
Pb
 
2
Cu
 
2
(Se
6+
 
O
 
4
)(Se
4+
 
O
 
3
)(OH)
 
4
7.BC.65Munakataite
Pb
 
2
Cu
 
2
(Se
4+
 
O
 
3
)(SO
 
4
)(OH)
 
4
7.BC.70Chenite
Pb
 
4
Cu(SO
 
4
)
 
2
(OH)
 
6
7.BC.75Krivovichevite
Pb
 
3
Al(SO
 
4
)(OH)
 
7
7.BC.80Anhydrokainite
KMg(SO
 
4
)Cl
Related Minerals - Hey's Index Grouping:

- +
25.7.1Schaurteite
Ca
 
3
Ge(SO
 
4
)
 
2
(OH)
 
6
· 4H
 
2
O
25.7.2Zircosulfate
(Zr,Ti)(SO
 
4
)
 
2
· 4H
 
2
O
25.7.3Anglesite
PbSO
 
4
25.7.4Lanarkite
Pb
 
2
(SO
 
4
)O
25.7.5Palmierite
(K,Na)
 
2
Pb(SO
 
4
)
 
2
25.7.6Linarite
PbCu(SO
 
4
)(OH)
 
2
25.7.7Elyite
Pb
 
4
Cu(SO
 
4
)O
 
2
(OH)
 
4
· H
 
2
O
25.7.8Chenite
Pb
 
4
Cu(SO
 
4
)
 
2
(OH)
 
6
25.7.9Osarizawaite
Pb(Al,Cu)
 
3
(SO
 
4
)
 
2
(OH)
 
6
25.7.10Itoite
Pb
 
3
Ge
4+
 
(SO
 
4
)
 
2
O
 
2
(OH)
 
2
25.7.11Fleischerite
Pb
 
3
Ge(SO
 
4
)
 
2
(OH)
 
6
· 3H
 
2
O
25.7.12Beaverite-(Cu)
Pb(Fe
3+
 
,Cu)
 
3
(SO
 
4
)
 
2
(OH)
 
6
Related Minerals - Dana Grouping):

- +
30.2.5.1Jarosite
KFe
3+
 
 
3
(SO
 
4
)
 
2
(OH)
 
6
30.2.5.3Hydroniumjarosite
(H
 
3
O)Fe
3+
3
(SO
 
4
)
 
2
(OH)
 
6
30.2.5.5Argentojarosite
AgFe
3+
3
(SO
 
4
)
 
2
(OH)
 
6

Other Names for Plumbojarosite

Synonyms:
Lead JarositeVegasite
Other Languages:
German:Plumbojarosit
Russian:Плюмбоярозит
Simplified Chinese:铅铁矾
黄铅铁矾
Spanish:Plumbojarosita
Traditional Chinese:鉛鐵礬
黃鉛鐵礬

Other Information

Other Information:Very slowly soluble in acids.
Health Warning: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:

- +
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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  • Mineral Dealers:
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  • Find Plumbojarosite on www.crystalclassics.co.uk
  • Localities for Plumbojarosite

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