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Beudantite

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Bad Ems District, Lahn valley, Rhineland-Palatinate, Germany
© Stephan Wolfsried

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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 Subgroup
Name:
Named by Armand Levy in 1826 in honor of Francois Sulpice Beudant [September 5, 1787 Paris, France – December 10, 1850 Paris, France], French Mineralogist, University of Paris, Paris, France.


Beudantite Subgroup of the Alunite Group. 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).
Some beudantite (and segnitite) may contain 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 {R3 2/m}
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, or pseudo-octahedra. 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

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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
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 Subgroup
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
Schlossmacherite
(H
 
3
O,Ca)Al
 
3
(SO
 
4
,AsO
 
4
)
 
2
(OH)
 
6
Svanbergite
SrAl
 
3
(PO
 
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.05Weilerite
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
(PO
 
4
,SO
 
4
)(HPO
 
4
,PO
 
4
)(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+
3
(PO
 
4
)
 
2
(OH,H
 
2
O)
 
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,Ca)Al
 
3
(SO
 
4
,AsO
 
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
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
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

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