Beudantite Mineral Data

General Beudantite Information

Chemical Formula:

PbFe+++3(AsO4)(SO4)(OH)6

Composition:

Molecular Weight = 711.77 gm

Iron 23.54 % Fe 33.65 % Fe₂O₃

Arsenic 10.53 % As 16.15 % As₂O₅

Hydrogen 0.85 % H 7.59 % H₂O

Lead 29.11 % Pb 31.36 % PbO

Sulfur 4.51 % S 11.25 % SO₃

Oxygen 31.47 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

PbFe³⁺₃(AsO₄)(SO₄)(OH)₆

IMA Status:

Valid Species (Pre-IMA) 1826

Locality:

Link to MinDat.org Location Data.

Name Origin:

Named after the French mineralogist, F. S. Beudant (1787-1850).

Name Pronunciation:

Beudantite + Pronunciation

Synonym:

Corkite

ICSD 67455

PDF 19-689

Beudantite Image

Images:

Beudantite

Comments: Sharp and lustrous crystals of beudantite to 4 mm across on quartz.
Location: Tsumeb Mine, Tsumeb, Namibia. Scale: 2.7 x 2.5 cm.
© John Veevaert

Images:

Scorodite Beudantite

Comments: Blue, 2 cm in length scorodite crystals on a sparkling matrix of brilliant brown-black beudantite.
Location: Tsumeb, Namibia. Scale: 8 x 5 x 3 cm.
© John Schneider

Beudantite Crystallography

Axial Ratios:

a:c = 1:2.32513

Cell Dimensions:

a = 7.32, c = 17.02, Z = 3; V = 789.79 Den(Calc)= 4.49

Crystal System:

Trigonal - Hexagonal Scalenohedral H-M Symbol (3 2/m) Space Group: R 3m

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

By Intensity(I/I_o): 3.08(1), 5.99(0.8), 3.67(0.7),

Physical Properties of Beudantite

Cleavage:

{0001} Perfect

Color:

Brown, Green, Yellow, Dark green, Orange.

Density:

4.1 - 4.3, Average = 4.19

Diaphaneity:

Transparent to Translucent

Fracture:

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

Habit:

Blocky - Rhombohedral - Crystal shape resembles rhomohedrons.

Habit:

Druse - Crystal growth in a cavity which results in numerous crystal tipped surfaces.

Habit:

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

Hardness:

4 - Fluorite

Luminescence:

Non-fluorescent.

Luster:

Adamantine

Streak:

greenish yellow

Optical Properties of Beudantite

Dichroism (e):

none.

Dichroism (w):

none.

Gladstone-Dale:

CI meas= -0.03 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.037 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2116,KPDmeas= 0.2262,KC= 0.2196
Ncalc = 1.9 - 1.99

Optical Data:

Uniaxial (-), e=1.943, w=1.957, bire=0.0140.

Calculated Properties of Beudantite

Electron Density:

Bulk Density (Electron Density)=3.86 gm/cc
note: Specific Gravity of Beudantite =4.20 gm/cc.

Fermion Index:

Fermion Index = 0.06
Boson Index = 0.94

Photoelectric:

PE_Beudantite= 501.54 barns/electron
U=PE_Beudantite x rElectron Density=1,935.52 barns/cc.

Radioactivity:

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

Beudantite Classification

Dana Class:

43.04.01.01 (43)Compound Phosphates, etc.

(43.04)(Anhydrous Compound Anions With Hydroxyl or Halogen)

(43.04.01)Beudantite Group

43.04.01.01 Beudantite PbFe3(AsO4)(SO4)(OH)6 R 3m 3 2/m

43.04.01.02 Corkite PbFe3(PO4)(SO4)(OH)6 R 3m 3m

43.04.01.03 Hidalgoite PbAl3(AsO4)(SO4)(OH)6 R 3m 3 2/m

43.04.01.04 Orpheite PbAl3(PO4,SO4)2(OH)6(?) R 3m 3 2/m

43.04.01.05 Hinsdalite (Pb,Sr)Al3(PO4)(SO4)(OH)6 R 3m 3 2/m

43.04.01.06 Svanbergite SrAl3(PO4)(SO4)(OH)6 R 3m 3 2/m

43.04.01.07 Kemmlitzite (Sr,Ce)Al3(AsO4)(SO4)(OH)6 R 3m 3 2/m

43.04.01.08 Woodhouseite CaAl3(PO4)(SO4)(OH)6 R 3m 3 2/m

43.04.01.09 Weilerite BaAl3H[(As,P)O4]2(OH)6 R 3m 3 2/m

43.04.01.10 Gallobeudantite! PbGa3[(AsO4),(SO4)]2(OH)6 R 3m 3m

Strunz Class:

08.BL.05 08 - PHOSPHATES, ARSENATES, VANADATES

08.B - Phosphates, etc. with Additional Anions, without H2O

08.BL -With medium-sized and large cations, (OH, etc.):RO4 = 3:1

08.BL.05 Beudantite PbFe3(AsO4)(SO4)(OH)6 R 3m 3 2/m

08.BL.05 Corkite PbFe3(PO4)(SO4)(OH)6 R 3m 3m

08.BL.05 Hidalgoite PbAl3(AsO4)(SO4)(OH)6 R 3m 3 2/m

08.BL.05 Gallobeudantite! PbGa3[(AsO4),(SO4)]2(OH)6 R 3m 3m

08.BL.05 Hinsdalite (Pb,Sr)Al3(PO4)(SO4)(OH)6 R 3m 3 2/m

08.BL.05 Kemmlitzite (Sr,Ce)Al3(AsO4)(SO4)(OH)6 R 3m 3 2/m

08.BL.05 Orpheite PbAl3(PO4,SO4)2(OH)6(?) R 3m 3 2/m

08.BL.05 Woodhouseite CaAl3(PO4)(SO4)(OH)6 R 3m 3 2/m

08.BL.05 Weilerite BaAl3H[(As,P)O4]2(OH)6 R 3m 3 2/m

08.BL.05 Svanbergite SrAl3(PO4)(SO4)(OH)6 R 3m 3 2/m

Other Beudantite Information

References:

NAME( Duda&Rejl90) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Beudantite :
1 - Alkali-Nuts(English)
2 - Alkali-Nuts(Francais)
3 - Am. Min. Crystal Structure Database
4 - Amethyst Galleries' Mineral Gallery
5 - Athena
6 - EUROmin Project
7 - Ecole des Mines de Paris
8 - GeoScienceWorld
9 - Google Images
10 - Google Scholar
11 - Handbook of Mineralogy (MinSocAm)
12 - Handbook of Mineralogy (UofA)
13 - HyperPhysics
14 - MinDAT
15 - Mineralienatlas (Deutsch)
16 - Online Mineral Museum
17 - QUT Mineral Atlas
18 - Ruff.Info
19 - WWW-MINCRYST

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Beudantite

PbFe+++3(AsO4)(SO4)(OH)6
Dana No: 43.04.01.01 Strunz No: 08.BL.05
Locality:

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