General Beudantite Information
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Chemical Formula: |
PbFe+++3(AsO4)(SO4)(OH)6 |
Composition: |
Molecular Weight = 711.77 gm |
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Iron 23.54 % Fe 33.65 % Fe2O3 |
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Arsenic 10.53 % As 16.15 % As2O5 |
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Hydrogen 0.85 % H 7.59 % H2O |
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Lead 29.11 % Pb 31.36 % PbO |
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Sulfur 4.51 % S 11.25 % SO3 |
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Oxygen 31.47 % O |
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______ ______ |
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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). |
Synonym: |
Corkite |
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ICSD 67455 |
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PDF 19-689 |
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Beudantite Image |
Images:
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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 |
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Images:
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Beudantite Scorodite
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 |
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Beudantite Crystallography
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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 ScalenohedralH-M Symbol (3 2/m) Space Group: R 3m |
X Ray Diffraction: |
By Intensity(I/Io): 3.08(1), 5.99(0.8), 3.67(0.7), |
Crystal Structure:
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Szymanski J T , The Canadian Mineralogist , 26 (1988) p.923-932, The crystal structure of beudantite, Pb(Fe,Al)3((As,S)O4)2(OH)6
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Physical Properties of Beudantite
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Cleavage: |
[0001] Perfect |
Color: |
Brown, Green, Yellow, Dark green, Orange. |
Density: |
4.1 - 4.3, Average = 4.19 |
Diaphaniety: |
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: |
None. |
Luster: |
Adamantine |
Streak: |
greenish yellow |
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Optical Properties of Beudantite
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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 |
Optical Data: |
Uniaxial (-), e=1.943, w=1.957, bire=0.0140. |
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Calculated Properties of Beudantite
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Electron Density: |
relectron=3.86 gm/cc note: rBeudantite =4.20 gm/cc. |
Fermion Index |
Fermion Index = 0.06981 Boson Index = 0.93019 |
Photoelectric: |
PEBeudantite = 501.54 barns/electron U=PEBeudantite x relectron=1,935.52 barns/cc. |
Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Beudantite is Not Radioactive |
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Beudantite Classification
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Dana Class: |
43.4.1.1 (43)Compound Phosphates, etc. |
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(43.4)(Anhydrous Compound Anions With Hydroxyl or Halogen) |
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(43.4.1)Dana Group |
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43.4.1.1 Beudantite PbFe3(AsO4)(SO4)(OH)6 R 3m 3 2/m |
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43.4.1.2 Corkite PbFe3(PO4)(SO4)(OH)6 R 3m 3m |
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43.4.1.3 Hidalgoite PbAl3(AsO4)(SO4)(OH)6 R 3m 3 2/m |
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43.4.1.4 Orpheite PbAl3(PO4,SO4)2(OH)6(?) R 3m 3 2/m |
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43.4.1.5 Hinsdalite (Pb,Sr)Al3(PO4)(SO4)(OH)6 R 3m 3 2/m |
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43.4.1.6 Svanbergite SrAl3(PO4)(SO4)(OH)6 R 3m 3 2/m |
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43.4.1.7 Kemmlitzite (Sr,Ce)Al3(AsO4)(SO4)(OH)6 R 3m 3 2/m |
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43.4.1.8 Woodhouseite CaAl3(PO4)(SO4)(OH)6 R 3m 3 2/m |
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43.4.1.9 Weilerite BaAl3H[(As,P)O4]2(OH)6 R 3m 3 2/m |
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43.4.1.10 Gallobeudantite! PbGa3[(AsO4),(SO4)]2(OH)6 R 3m 3m |
Strunz Class: |
VII/B.35-90 VII - Phosphates, Arsenates and Vanadates |
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VII/B - Waterfree phosphates with unfamiliar anions F, Cl, O, OH. cations of medium and big size: Mg, Cu, Zn, and Ca, Na, K, Ba, Pb |
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VII/B.35 - Beudantite group |
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VII/B.35-10 Schlossmacherite (H3O,Ca)Al3(AsO4,SO4)2(OH)6 R 3m 3 2/m |
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VII/B.35-20 Woodhouseite CaAl3(PO4)(SO4)(OH)6 R 3m 3 2/m |
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VII/B.35-30 Svanbergite SrAl3(PO4)(SO4)(OH)6 R 3m 3 2/m |
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VII/B.35-40 Kemmlitzite (Sr,Ce)Al3(AsO4)(SO4)(OH)6 R 3m 3 2/m |
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VII/B.35-60 Hinsdalite (Pb,Sr)Al3(PO4)(SO4)(OH)6 R 3m 3 2/m |
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VII/B.35-65 Orpheite PbAl3(PO4,SO4)2(OH)6(?) R 3m 3 2/m |
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VII/B.35-70 Hidalgoite PbAl3(AsO4)(SO4)(OH)6 R 3m 3 2/m |
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VII/B.35-75 Gallobeudantite! PbGa3[(AsO4),(SO4)]2(OH)6 R 3m 3m |
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VII/B.35-80 Corkite PbFe3(PO4)(SO4)(OH)6 R 3m 3m |
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VII/B.35-90 Beudantite PbFe3(AsO4)(SO4)(OH)6 R 3m 3 2/m |
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Other Beudantite Information
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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 - Crocoite.com Mineral Locations
7 - EUROmin Project
8 -Google Images
9 -Google Scholar
10 -Handbook of Mineralogy (UofA)
11 - HyperPhysics
12 -MinDAT
13 -MinMax(Deutsch)
14 -MinMax(English)
15 -Mineralienatlas (Deutsch)
16 -QUT Mineral Atlas
17 - WWW-MINCRYST
18 -École des Mines de Paris
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Print or Cut-and-Paste your Beudantite Specimen Label here :
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Beudantite
PbFe+++3(AsO4)(SO4)(OH)6
Dana No: 43.4.1.1 Strunz No: VII/B.35-90
Locality:
Notes:
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