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Seeligerite

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Formula:
Pb3(IO3)OCl3
System:
Orthorhombic
Colour:
Bright yellow
Name:
Named after Erich Seeliger, Professor of Mineralogy.
This page provides mineralogical data about Seeligerite.

Classification of Seeligerite

Approved
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 ed.:
22.1.2.1
22.1.2.1

22 : IODATES CONTAINING HYDROXYL OR HALOGEN
1 : Miscellaneous
29.6

29 : Iodates
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Type Occurrence of Seeligerite

Physical Properties of Seeligerite

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°
Max Birefringence:
δ = 0.200
Image 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:
Pb3(IO3)OCl3
Essential elements:
All elements listed in formula:

Relationship of Seeligerite to other Species

29.1SalesiteCu(IO3)(OH)
29.2BellingeriteCu3(IO3)6 · 2H2O
29.3LautariteCa(IO3)2
29.4BrüggeniteCa(IO3)2 · H2O
29.5DietzeiteCa2(IO3)2(CrO4) · H2O
29.7SchwartzembergitePb5H2(IO2)O4Cl3
29.8HectorfloresiteNa9(SO4)4(IO3)

Other Names for Seeligerite

Name in Other Languages:
German:Seeligerit
Spanish:Seeligerita

Other Information

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 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

Specimens:
The following Seeligerite specimens are currently listed for sale on minfind.com.

Localities for Seeligerite

(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? 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.
      • Sierra Gorda District
        • Caracoles
Martins da Pedra collection
V. Sapienza collection
Mr. Terry Szenics; V. Sapienza collection
M. Dini specimens
Brent Thorne specimen
Neues Jahrb.Min.,Mh.(1971) 210-217
          • Sierra Deseada
Jasun McAvoy specimen
  • Tarapacá Region
    • El Tamarugal Province
      • Challacollo
maurizio dini collection - analysed material
Mineral and/or Locality  
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