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Seeligerite

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San Francisco Mine (Beatrix Mine), Caracoles, Sierra Gorda District, Tocopilla Province, Antofagasta Region, Chile
© R.D.Green

Show Seeligerite Photos (20)
Formula:
Pb
 
3
IO
 
4
Cl
 
3
System:OrthorhombicColour:Bright yellow
Name:Named after Erich Seeliger, Professor of Mineralogy.
This page provides mineralogical data about Seeligerite.

Classification of Seeligerite

IMA status:Approved
Strunz 8th edition ID:4/L.03-10
Strunz 9th edition ID:4.KB.
Nickel-Strunz 10th (pending) edition ID:4.KB.15

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
K : Iodates: Trigonal [IO3] pyramids (mostly).
B : Iodates with additional anions, without H2O
Dana 7th edition ID:22.1.2.1
Dana 8th edition ID:22.1.2.1

22 : IODATES CONTAINING HYDROXYL OR HALOGEN
1 : Miscellaneous
Hey's CIM Ref.:29.6

29 : Iodates
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Type Occurrence of Seeligerite

Type Locality:Santa Ana Mine, Caracoles, Sierra Gorda District, Tocopilla Province, Antofagasta Region, Chile

Physical Properties of Seeligerite

Lustre:Vitreous, Waxy
Colour:Bright yellow

Crystallography of Seeligerite

Crystal System:Orthorhombic
Class (H-M):mm2 - Pyramidal
Space Group:Cmm2
Cell Parameters:a = 7.971(2) Å, b = 7.976(2) Å, c = 27.341(5) Å
Ratio:a:b:c = 0.999 : 1 : 3.428
Unit Cell Volume:V 1738.3 ų
Z:8
Comment:The TEM investigation has revealed additional superlattice reflections.

Optical Data of Seeligerite

Type:Biaxial (-)
RI values: nα = 2.120 nβ = 2.320 nγ = 2.320
2V:Measured: 4°
Maximum Birefringence:δ = 0.200

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Very High
Dispersion:r < v

Chemical Properties of Seeligerite

Formula:
Pb
 
3
IO
 
4
Cl
 
3
Essential elements:Cl, I, O, Pb
All elements listed in formula:Cl, I, O, Pb

Relationship of Seeligerite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
4.KB.05Salesite
Cu[OH|IO
 
3
]
4.KB.10Schwartzembergite
Pb
2+
5
I
3+
 
O
 
6
H
 
2
Cl
 
3
Related Minerals - Hey's Index Grouping:

- +
29.1Salesite
Cu[OH|IO
 
3
]
29.2Bellingerite
Cu
 
3
(IO
 
3
)
 
6
·2H
 
2
O
29.3Lautarite
Ca(IO
 
3
)
 
2
29.4Brüggenite
Ca(IO
 
3
)
 
2
·H
 
2
O
29.5Dietzeite
Ca
 
2
[CrO
 
4
|(IO
 
3
)
 
2
] · H
 
2
O
29.7Schwartzembergite
Pb
2+
5
I
3+
 
O
 
6
H
 
2
Cl
 
3
29.8Hectorfloresite
Na
 
9
[IO
 
3
|(SO
 
4
)
 
4
]

Other Names for Seeligerite

Synonyms:
IMA1970-036
Other Languages:
German:Seeligerit
Spanish:Seeligerita

Other Information

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 Seeligerite

Reference List:American Mineralogist (1972): 57: 327-328.

Bindi, L., M. D. Welch, P. Bonazzi, G. Pratesi, & S. Menchetti (2008): The crystal structure of seeligerite, Pb3IO4Cl3, a rare Pb-I-oxychloride from the San Rafael mine, Sierra Gorda, Chile. Mineralogical Magazine 72, 771-783.

Internet Links for Seeligerite

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  • Raman and XRD data at RRUFF project
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  • Seeligerite details from Handbook of Mineralogy (PDF)
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    Localities for Seeligerite

    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Chile
     
    • Antofagasta Region
      • Antofagasta Province
    		Lukas Kruszewski collection
        • Cerro Palestina
          • Estación Cerro Negro
            • Magallanes district
    		Samples analysed by Dr. Jochen Schluter (Hamburg University), Germany.
    Peebles F./Ruiz Fuller C.(1988); \"Yacimientos Metalíferos de Chile\", Fondecyt, Stgo. de Chile.
      • Tocopilla Province
        • Sierra Gorda District
          • Caracoles
    		V. Sapienza collection
    Mr. Terry Szenics; V. Sapienza collection
    M. Dini specimens
    Neues Jahrb.Min.,Mh.(1971) 210-217
    • Tarapacá Region
      • Iquique Province
        • Challacollo
    		maurizio dini collection - analysed material
    Mineral and/or Locality
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