Seeligerite Mineral Data

General Seeligerite Information

Chemical Formula:

Pb3Cl3(IO3)O

Composition:

Molecular Weight = 918.86 gm

Lead 67.65 % Pb 72.87 % PbO

Iodine 13.81 % I 18.16 % I₂O₅

Chlorine 11.58 % Cl 11.58 % Cl

- % Cl -2.61 % -O=Cl₂

Oxygen 6.96 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Pb₃Cl₃(IO₃)O

Environment:

Secondary mineral in nitrate deposits.

IMA Status:

Approved IMA 1971

Locality:

Santa Ana mine, Caracoles, Sierra Groda, Chile. Link to MinDat.org Location Data.

Name Origin:

Named for Erich Seeliger, German mineralogist, Technical University, Berlin.

Name Pronunciation:

Seeligerite + Pronunciation

Seeligerite Image

Images:

Seeligerite

Comments: Orange crystalline seeligerite in matrix.
Location: Casucha Mine, Sierra Gorda, Antofagasta, Chile. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Seeligerite Crystallography

Axial Ratios:

a:b:c =1:1:3.4264

Cell Dimensions:

a = 7.964, b = 7.964, c = 27.288, Z = 8; V = 1,730.75 Den(Calc)= 7.05

Crystal System:

Orthorhombic - DisphenoidalH-M Symbol (2 2 2) Space Group: C 222₁

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

By Intensity(I/I_o): 3.219(1), 3.649(0.9), 2.785(0.8),

Physical Properties of Seeligerite

Cleavage:

{001} Perfect, {110} Good

Color:

Light yellow.

Density:

6.83

Habit:

Platy - Sheet forms (e.g. micas).

Streak:

light yellow

Optical Properties of Seeligerite

Gladstone-Dale:

CI meas= -0.086 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.052 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1778,KPDmeas= 0.1835,KC= 0.1689
Ncalc = 2.15 - 2.19

Optical Data:

Biaxial (-), a=2.12, b=2.32, g=2.32, bire=0.2000, 2V(Calc)=0, 2V(Meas)=4.

Calculated Properties of Seeligerite

Electron Density:

Bulk Density (Electron Density)=5.86 gm/cc
note: Specific Gravity of Seeligerite =7.05 gm/cc.

Fermion Index:

Fermion Index = 0.14
Boson Index = 0.86

Photoelectric:

PE_Seeligerite=1,305.79 barns/electron
U=PE_Seeligerite x rElectron Density=7,654.33 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Seeligerite is Not Radioactive

Seeligerite Classification

Dana Class:

22.01.02.01 (22)Iodates - Hydroxyl or Halogen

(22.01)with miscellaneous formulae

(22.01.02)Dana Group

22.01.02.01 Seeligerite Pb3Cl3(IO3)O C 222₁ 2 2 2

Strunz Class:

04.KB.15 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate

04.K - Iodates

04.KB -Iodates with additional anions, without H2O

04.KB.15 Seeligerite Pb3Cl3(IO3)O C 222₁ 2 2 2

Other Seeligerite Information

References:

NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Seeligerite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info

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Ask about Seeligerite here :
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Print or Cut-and-Paste your Seeligerite Specimen Label here :

Seeligerite

Pb3Cl3(IO3)O
Dana No: 22.01.02.01 Strunz No: 04.KB.15
Locality:

Notes: