Fleischerite Mineral Data

General Fleischerite Information

Chemical Formula:

Pb3Ge(SO4)2(OH)6•3(H2O)

Composition:

Molecular Weight = 1,006.40 gm

Germanium 7.21 % Ge 10.39 % GeO₂

Hydrogen 0.80 % H 7.16 % H₂O

Lead 61.76 % Pb 66.53 % PbO

Sulfur 6.37 % S 15.91 % SO₃

Oxygen 23.85 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Pb₃Ge(SO₄)₂(OH)₆•(H₂O)

Environment:

Oxidized portion of a dolostone-hosted hydrothermal germanium-bearing polymetallic ore deposit.

IMA Status:

Approved IMA 1960

Locality:

Tsumeb, Namibia. Link to MinDat.org Location Data.

Name Origin:

Named for Michael Fleischer (1908-1998), mineralogist and geochemist, U.S. Geological Survey, Washington, D.C., USA.

Name Pronunciation:

Fleischerite + Pronunciation

Synonym:

ICSD 4295

PDF 29-771

Fleischerite Image

Images:

Fleischerite

Comments: Pale pink transparent acicular crystals of fleischerite.
Location: Tsumeb, Oshikoto, Namibia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Fleischerite Crystallography

Axial Ratios:

a:c = 1:1.22159

Cell Dimensions:

a = 8.89, c = 10.86, Z = 2; V = 743.30 Den(Calc)= 4.50

Crystal System:

Hexagonal - Dihexagonal Dipyramidal H-M Symbol (6/m 2/m 2/m) Space Group: P 6₃/mmc

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

By Intensity(I/I_o): 3.619(1), 2.635(0.8), 3.437(0.6),

Physical Properties of Fleischerite

Cleavage:

None

Color:

White, Light pink.

Density:

4.2 - 4.4, Average = 4.3

Diaphaneity:

Transparent to Translucent

Fracture:

Brittle - Generally displayed by glasses and most non-metallic minerals.

Hardness:

2.5-3 - Finger Nail-Calcite

Luster:

Silky

Streak:

white

Optical Properties of Fleischerite

Gladstone-Dale:

CI meas= -0.118 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.069 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1692,KPDmeas= 0.1771,KC= 0.1584
Ncalc = 1.67 - 1.71

Optical Data:

Uniaxial (+), w=1.747, e=1.776, bire=0.0290.

Calculated Properties of Fleischerite

Electron Density:

Bulk Density (Electron Density)=3.92 gm/cc
note: Specific Gravity of Fleischerite =4.50 gm/cc.

Fermion Index:

Fermion Index = 0.14
Boson Index = 0.86

Photoelectric:

PE_Fleischerite=1,094.56 barns/electron
U=PE_Fleischerite x rElectron Density=4,287.34 barns/cc.

Radioactivity:

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

Fleischerite Classification

Dana Class:

31.07.06.03 (31)Hydrated Sulfates Containing Hydroxyl or Halogen

(31.07)where (A+ B++)2 (XO4) Zqï¿½x(H2O)

(31.07.06)Despujolsite Group

31.07.06.01 Despujolsite Ca3Mn(SO4)2(OH)6•3(H2O) P 62c 6 m2

31.07.06.02 Schaurteite Ca3Ge(SO4)2(OH)6•3(H2O) P 62c 6 m2

31.07.06.03 Fleischerite Pb3Ge(SO4)2(OH)6•3(H2O) P 6₃/mmc 6/m 2/m 2/m

31.07.06.04 Mallestigite! Pb3Sb(SO4)(AsO4)(OH)6•3(H2O) P 6₃ 6 2 2

Strunz Class:

07.DF.25 07 - SULFATES (SELENATES, TELLURATES)

07.D - Sulfates (selenates, etc.) with additional anions, with H2O

07.DF -With large and medium-sized cations

07.DF.25 Despujolsite Ca3Mn(SO4)2(OH)6•3(H2O) P 62c 6 m2

07.DF.25 Fleischerite Pb3Ge(SO4)2(OH)6•3(H2O) P 6₃/mmc 6/m 2/m 2/m

07.DF.25 Mallestigite! Pb3Sb(SO4)(AsO4)(OH)6•3(H2O) P 6₃ 6 2 2

07.DF.25 Schaurteite Ca3Ge(SO4)2(OH)6•3(H2O) P 62c 6 m2

Other Fleischerite Information

References:

NAME( AntBidBlaNic5) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Fleischerite :
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
15 - WWW-MINCRYST

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Print or Cut-and-Paste your Fleischerite Specimen Label here :

Fleischerite

Pb3Ge(SO4)2(OH)6•3(H2O)
Dana No: 31.07.06.03 Strunz No: 07.DF.25
Locality:

Notes:

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