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Beudantite

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Formula:
PbFe
 
3
(AsO
 
4
)(SO
 
4
)(OH)
 
6
System:TrigonalColour:Black, dark green, ...
Lustre:Vitreous, Sub-Vitreous, Resinous, GreasyHardness:3½ - 4½
Member of:Beudantite Group > Alunite Supergroup
Name:
Named by Armand Levy in 1826 in honor of François Sulpice Beudant [September 5, 1787 Paris, France – December 10, 1850 Paris, France], systematic Mineralogist, University of Paris, Paris, France. Beudant introduced many new mineral names in his books that have superseded older names.


The arsenate analogue of corkite with which a complete solid-solution range exists. Also forms a solid solution with segnitite and plumbojarosite from which it is difficult to distinguish.

A secondary mineral occurring in the oxidized zones of polymetallic deposits. It shows a large variety of different habits (tabular, acute rhombohedral, pseudo-cubic, pseudo-cuboctahedral, very rarely also acicular).
Some beudantite (and segnitite) may contain minor Sb replacing Fe.

Classification of Beudantite

IMA status:Approved
Strunz 8th edition ID:7/B.35-90
Nickel-Strunz 10th (pending) edition ID:8.BL.05

8 : PHOSPHATES, ARSENATES, VANADATES
B : Phosphates, etc., with additional anions, without H2O
L : With medium-sized and large cations, (OH, etc.):RO4 = 3:1
Dana 8th edition ID:43.4.1.1

43 : COMPOUND PHOSPHATES, ETC.
4 : Anhydrous Compound Phosphates, etc·, Containing Hydroxyl or Halogen
Hey's CIM Ref.:22.3.24

22 : Phosphates, Arsenates or Vanadates with other Anions
3 : Phosphates, arsenates or vanadates with sulphates
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Type Occurrence of Beudantite

Type Locality:Louise Mine, Bürdenbach, Altenkirchen, Wied Iron Spar District, Westerwald, Rhineland-Palatinate, Germany
Year of Discovery:1826
Geological Setting of type material:Oxidized zone of a polymetallic ore deposit.

Occurrences of Beudantite

Geological Setting:Secondary mineral in oxidation zone of polymetallic deposits.

Physical Properties of Beudantite

Lustre:Vitreous, Sub-Vitreous, Resinous, Greasy
Diaphaneity (Transparency):Transparent, Translucent
Comment:May be frosted.
Colour:Black, dark green, brown, dark yellow, red, greenish yellow, brown
Streak:Grayish yellow to green
Hardness (Mohs):3½ - 4½
Tenacity:Brittle
Cleavage:Distinct/Good
Good on {0001}
Density (measured):4.48(2) g/cm3
Density (calculated):4.49 g/cm3

Crystallography of Beudantite

Crystal System:Trigonal
Class (H-M):3m (3 2/m) - Hexagonal Scalenohedral
Space Group:R3m
Space Group Setting:R3m
Cell Parameters:a = 7.32Å, c = 17.02Å
Ratio:a:c = 1 : 2.325
Unit Cell Volume:V 789.79 ų (Calculated from Unit Cell)
Z:3
Morphology:Pseudo-cubic. Crystals tabular, pseudo-cubes, pseudo-cuboctahedra or pseudo-octahedra; very rarely also acicular. Microcrystalline massive.
Crystal Atlas:
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Beudantite no.1 - Goldschmidt (1913-1926)
Beudantite no.2 - Goldschmidt (1913-1926)
Beudantite no.4 - Goldschmidt (1913-1926)

About Crystal Atlas

The mindat.org Crystal Atlas allows you to view a selection of crystal drawings of real and idealised crystal forms for this mineral and, in certain cases, 3d rotating crystal objects. The 3d models and HTML5 code are kindly provided by www.smorf.nl.

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X-Ray Powder Diffraction:
d-spacingIntensity
5.725 (50)
5.089 (45)
3.108 (50)
3.078 (100)
2.865 (80)
2.290 (70)
1.979 (35)
Comments:Also ICDD 19-689 (somewhat different)

Optical Data of Beudantite

Type:Uniaxial (-)
RI values: nω = 1.957 nε = 1.943
Birefringence:0.014
Maximum Birefringence:δ = 0.014

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Very High
Pleochroism:Visible
Comments:O = Yellow to red-brown
E = Colourless to yellow
Comments:Anomalously biaxial, exhibiting sectoring. Crystals may exhibit three biaxial sectors around an uniaxial core (Laurion).

Chemical Properties of Beudantite

Formula:
PbFe
 
3
(AsO
 
4
)(SO
 
4
)(OH)
 
6
Simplified for copy/paste:PbFe3(AsO4)(SO4)(OH)6
Essential elements:As, Fe, H, O, Pb, S
All elements listed in formula:As, Fe, H, O, Pb, S
Common Impurities:Al,P

Relationship of Beudantite to other Species

Series:Forms a series with Segnitite (see here)
Member of:Beudantite Group > Alunite Supergroup
Other Members of Group:

- +
Corkite
PbFe
 
3
(PO
 
4
)(SO
 
4
)(OH)
 
6
Gallobeudantite
PbGa
 
3
(AsO
 
4
)(SO
 
4
)(OH)
 
6
Hidalgoite
PbAl
 
3
(AsO
 
4
)(SO
 
4
)(OH)
 
6
Hinsdalite
PbAl
 
3
(PO
 
4
)(SO
 
4
)(OH)
 
6
Kemmlitzite
(Sr,Ce)Al
 
3
(AsO
 
4
)(SO
 
4
)(OH)
 
6
Svanbergite
SrAl
 
3
(PO
 
4
)(SO
 
4
)(OH)
 
6
Weilerite
BaAl
 
3
(AsO
 
4
)(SO
 
4
)(OH)
 
6
Woodhouseite
CaAl
 
3
(PO
 
4
)(SO
 
4
)(OH)
 
6
Common Associates:
ScoroditePharmacosideriteOliveniteMimetiteDussertite
DuftiteCerussiteCarminiteBayldoniteAzurite
ArseniosideriteAnglesite
Related Minerals - Nickel-Strunz Grouping):

- +
8.BL.05Corkite
PbFe
 
3
(PO
 
4
)(SO
 
4
)(OH)
 
6
8.BL.05Hidalgoite
PbAl
 
3
(AsO
 
4
)(SO
 
4
)(OH)
 
6
8.BL.05Hinsdalite
PbAl
 
3
(PO
 
4
)(SO
 
4
)(OH)
 
6
8.BL.05Kemmlitzite
(Sr,Ce)Al
 
3
(AsO
 
4
)(SO
 
4
)(OH)
 
6
8.BL.05Svanbergite
SrAl
 
3
(PO
 
4
)(SO
 
4
)(OH)
 
6
8.BL.05Woodhouseite
CaAl
 
3
(PO
 
4
)(SO
 
4
)(OH)
 
6
8.BL.05Gallobeudantite
PbGa
 
3
(AsO
 
4
)(SO
 
4
)(OH)
 
6
8.BL.10Arsenogoyazite
SrAl
 
3
(AsO
 
4
)
 
2
(OH)
 
5
· H
 
2
O
8.BL.10Arsenogorceixite
BaAl
 
3
(AsO
 
4
)
 
2
(OH)
 
5
· H
 
2
O
8.BL.10Arsenocrandallite
CaAl
 
3
(AsO
 
4
)
 
2
(OH)
 
5
· H
 
2
O
8.BL.10Benauite
SrFe
3+
3
(HPO
 
4
,PO
 
4
)
 
2
(OH)
 
6
8.BL.10Crandallite
CaAl
 
3
(PO
 
4
)
 
2
(OH)
 
5
· H
 
2
O
8.BL.10Dussertite
BaFe
3+
3
(AsO
 
4
)
 
2
(OH)
 
5
8.BL.10Eylettersite
(Th,Pb)Al
 
3
(PO
 
4
,SiO
 
4
)
 
2
(OH)
 
6
8.BL.10Gorceixite
BaAl
 
3
(PO
 
4
)
 
2
(OH)
 
5
· H
 
2
O
8.BL.10Goyazite
SrAl
 
3
(PO
 
4
)
 
2
(OH)
 
5
· H
 
2
O
8.BL.10Kintoreite
PbFe
 
3
(PO
 
4
)(PO
 
3
OH)(OH)
 
6
8.BL.10Philipsbornite
PbAl
 
3
(AsO
 
4
)
 
2
(OH)
 
5
· H
 
2
O
8.BL.10Plumbogummite
PbAl
 
3
(PO
 
4
)
 
2
(OH)
 
5
· H
 
2
O
8.BL.10Segnitite
PbFe
3+
3
(AsO
 
4
)
 
2
(OH,H
 
2
O)
 
6
8.BL.10Springcreekite
BaV
3+
3
(PO
 
4
)
 
2
(OH,H
 
2
O)
 
6
8.BL.13Arsenoflorencite-(La)
(La,Ce,Nd)(Al,Fe
3+
 
)
 
3
(AsO
 
4
,PO
 
4
)
 
2
(OH)
 
6
8.BL.13Arsenoflorencite-(Nd)
NdAl
 
3
(AsO
 
4
)
 
2
(OH)
 
6
8.BL.13Arsenoflorencite-(Ce)
CeAl
 
3
(AsO
 
4
)
 
2
(OH)
 
6
8.BL.13Florencite-(Ce)
CeAl
 
3
(PO
 
4
)
 
2
(OH)
 
6
8.BL.13Florencite-(La)
LaAl
 
3
(PO
 
4
)
 
2
(OH)
 
6
8.BL.13Florencite-(Nd)
(Nd,La,Ce)Al
 
3
(PO
 
4
)
 
2
(OH)
 
6
8.BL.13Waylandite
BiAl
 
3
(PO
 
4
)
 
2
(OH)
 
6
8.BL.13Zaïrite
Bi(Fe
3+
 
,Al)
 
3
(PO
 
4
)
 
2
(OH)
 
6
8.BL.13Arsenowaylandite
BiAl
 
3
(AsO
 
4
)
 
2
(OH)
 
6
8.BL.13Graulichite-(Ce)
CeFe
3+
3
(AsO
 
4
)
 
2
(OH)
 
6
8.BL.13Florencite-(Sm)
(Sm,Nd)Al
 
3
(PO
 
4
)
 
2
(OH)
 
6
8.BL.15Viitaniemiite
Na(Ca,Mn
2+
 
)Al(PO
 
4
)(F,OH)
 
3
8.BL.25Pattersonite
PbFe
3+
3
(PO
 
4
)
 
2
(OH)
 
5
· H
 
2
O
Related Minerals - Hey's Index Grouping:

- +
22.3.1Parnauite
Cu
 
9
(AsO
 
4
)
 
2
(SO
 
4
)(OH)
 
10
· 7H
 
2
O
22.3.2Ardealite
Ca
 
2
(HPO
 
4
)(SO
 
4
) · 4H
 
2
O
22.3.3Machatschkiite
(Ca,Na)
 
6
(AsO
 
4
)(HAsO
 
4
)
 
3
(PO
 
4
,SO
 
4
) · 15H
 
2
O
22.3.4Clinotyrolite
Ca
 
2
Cu
 
9
(AsO
 
4
,SO
 
4
)
 
4
(OH,O)
 
10
· 10H
 
2
O
22.3.5Peisleyite
Na
 
2
Al
 
9
[(P,S)O
 
4
]
 
8
(OH)
 
6
•28H
 
2
O
22.3.6Chalcophyllite
Cu
 
18
Al
 
2
(SO
 
4
)
 
3
(AsO
 
4
)
 
3
(OH)
 
27
· 33H
 
2
O
22.3.7Woodhouseite
CaAl
 
3
(PO
 
4
)(SO
 
4
)(OH)
 
6
22.3.8Schlossmacherite
(H
 
3
O)Al
 
3
(SO
 
4
)
 
2
(OH)
 
6
22.3.9Svanbergite
SrAl
 
3
(PO
 
4
)(SO
 
4
)(OH)
 
6
22.3.10Kemmlitzite
(Sr,Ce)Al
 
3
(AsO
 
4
)(SO
 
4
)(OH)
 
6
22.3.11Sanjuanite
Al
 
2
(PO
 
4
)(SO
 
4
)(OH) · 9H
 
2
O
22.3.12Kribergite
Al
 
5
(PO
 
4
)
 
3
(SO
 
4
)(OH)
 
4
· 4H
 
2
O
22.3.13Hotsonite
Al
 
11
(SO
 
4
)
 
3
(PO
 
4
)
 
2
(OH)
 
21
· 16H
 
2
O
22.3.14Weilerite
BaAl
 
3
(AsO
 
4
)(SO
 
4
)(OH)
 
6
22.3.15Tsumebite
Pb
 
2
Cu(PO
 
4
)(SO
 
4
)(OH)
22.3.16Arsentsumebite
Pb
 
2
Cu(AsO
 
4
)(SO
 
4
)(OH)
22.3.17Hinsdalite
PbAl
 
3
(PO
 
4
)(SO
 
4
)(OH)
 
6
22.3.18Hidalgoite
PbAl
 
3
(AsO
 
4
)(SO
 
4
)(OH)
 
6
22.3.19Orpheite
22.3.20Coconinoite
Fe
3+
2
Al
 
2
(UO
 
2
)
 
2
(PO
 
4
)
 
4
(SO
 
4
)(OH)
 
2
· 20H
 
2
O
22.3.21Sasaite
(Al,Fe
3+
 
)
 
14
(PO
 
4
)
 
11
(SO
 
4
)(OH)
 
7
· 83H
 
2
O
22.3.22Tristramite
(Ca,U,Fe)(PO
 
4
,SO
 
4
) · 2H
 
2
O
22.3.23Corkite
PbFe
 
3
(PO
 
4
)(SO
 
4
)(OH)
 
6
22.3.25Diadochite
Fe
3+
2
(PO
 
4
)(SO
 
4
)(OH) · 5H
 
2
O
22.3.26Sarmientite
Fe
3+
2
(AsO
 
4
)(SO
 
4
)(OH) · 5H
 
2
O
22.3.27Bukovskýite
Fe
3+
2
(AsO
 
4
)(SO
 
4
)(OH) · 9H
 
2
O
22.3.28Zýkaite
Fe
3+
4
(AsO
 
4
)
 
3
(SO
 
4
)(OH) · 15H
 
2
O
22.3.29Tooeleite
Fe
3+
6
(As
3+
 
O
 
3
)
 
4
(SO
 
4
)(OH)
 
4
· 4H
 
2
O
22.3.30Pitticite
(Fe, SO
 
4
, AsO
 
4
, H
 
2
O) ?
22.3.31Xiangjiangite
(Fe
3+
 
,Al)(UO
 
2
)
 
4
(PO
 
4
)
 
2
(SO
 
4
)
 
2
(OH) · 22H
 
2
O

Other Names for Beudantite

Synonyms:
Beudantite (of Lévy)Bieirosite
Other Languages:
German:Beudanit
Beudantit
Bieirosit
Russian:Бедантит
Simplified Chinese:砷菱铅矾
砷铅铁矾
Spanish:Beudantita
Bieirosita
Traditional Chinese:砷菱鉛礬
砷鉛鐵礬
Varieties:
Cuprian Beudantite

Other Information

Fluorescence in UV light:Not fluorescent
Other Information:Soluble in HCl.
Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Beudantite

Reference List:

- +
Lévy (1826) Annals of Philosophy, London: 11: 194.

Percy, J. (1850) On the composition of beudantite. Philosophical Magazine and Journal of Science: 37: 161-169.

Dauber, H. (1857) Ueber Svanbergit und Beudantit. Annalen der Physik, Halle, Leipzig: 176: 579.

Rammelsberg, C. (1857) Ueber die Zusammensetzung des Beudantits. Annalen der Physik, Halle, Leipzig: 176: 581-583.

Sandberger, F. (1857) Ueber den Beudantit und seine Modificationen. Annalen der Physik, Halle, Leipzig: 176: 611-619.

Lacroix (1915) Bulletin de la Société française de Minéralogie: 38: 35.

Hintze, Carl (1931) Handbuch der Mineralogie. Berlin and Leipzig. 6 volumes: 1 [4A]: 729.

Simpson (1938) Journal of the Royal Society of Western Australia: 24: 110.

Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II. John Wiley and Sons, Inc., New York, 7th edition, revised and enlarged, 1124 pp.: 1001-1002.

Walenta, K. (1966) Beiträge zur Kenntnis seltener Arsenatmineralien unter besonderer Berücksichtigung von Vorkommen des Schwarzwaldes. 3. Folge. Tschermaks Mineral. Petrog. Mitt., 11, 121–164, esp. 122–129 (in German). Canadian Mineralogist: 26: 923-932.

Szymański, J.T. (1988) The crystal structure of beudantite, Pb(Fe, Al)3[(As, S)O4]2(OH)6. Canadian Mineralogist, 26, 923–932.

Giuseppetti, G. and C. Tadini (1989) Beudantite: PbFe3(SO4)(AsO4)(OH)6, its crystal structure, tetrahedral site disordering and scattered Pb distribution. Neues Jahrbuch für Mineralogie, Monatshefte (1989): 27-33.

Anthony, J.W., Bideaux, R.A., Bladh, K.W., and Nichols, M.C. (2000) Handbook of Mineralogy, Volume IV. Arsenates, Phosphates, Vanadates. Mineral Data Publishing, Tucson, AZ, 680pp.: 66.

Sejkora, J., Škovíra, J., Čejka, J. & Plášil, J. (2009): Cu-rich members of the beudantite-segnitite series from the Krupka ore district, the Krušné hory Mountains, Czech Republic. Journal of Geosciences, 54, 355-371.

Internet Links for Beudantite

Search Engines:
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  • External Links:
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  • Look for Beudantite on Wikipedia
  • Look for Beudantite on Mineralien Atlas
  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Beudantite details from Handbook of Mineralogy (PDF)
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    Localities for Beudantite

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