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Arsenbrackebuschite

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Ojuela Mine, Mapimí, Mun. de Mapimí, Durango, Mexico
© Vincent Bourgoin

Show Arsenbrackebuschite Photos (19)



Formula:
Pb
 
2
Fe
3+
 
(AsO
 
4
)
 
2
(OH)
May contain minor Zn replacing Fe; charge-balance by H2O substituting for OH.
System:MonoclinicColour:Light amber yellow to ...
Lustre:Sub-Adamantine, Sub-Vitreous, Resinous, WaxyHardness:4½
Member of:Brackebuschite Group
Name:Named by Wolfgang Hofmeister and E. Tilmanns in 1976 in allusion to this species being an arsenate within the brackebuschite group.


May be confused with (rarer) mawbyite, which is also a Pb-Fe-arsenate.

Classification of Arsenbrackebuschite

IMA status:Approved
Strunz 8th edition ID:7/B.24-40
Nickel-Strunz 10th (pending) edition ID:8.BG.05

8 : PHOSPHATES, ARSENATES, VANADATES
B : Phosphates, etc., with additional anions, without H2O
G : With medium-sized and large cations, (OH, etc.):RO4 = 0.5:1
Dana 8th edition ID:40.2.8.2

40 : HYDRATED NORMAL PHOSPHATES,ARSENATES AND VANADATES
2 : AB2(XO4)2·xH2O
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Type Occurrence of Arsenbrackebuschite

Co-type Localities:Clara Mine, Rankach valley, Oberwolfach, Wolfach, Black Forest, Baden-Württemberg, Germany
Tsumeb Mine (Tsumcorp Mine), Tsumeb, Otjikoto (Oshikoto) Region, Namibia
Year of Discovery:1978
Geological Setting of type material:Oxide zone of a complex polymetallic ore hydrothermal deposit
Associated Minerals at type locality:
TennantiteStolziteStolziteQuartzMimetite
MimetiteGoethiteChalcociteBayldoniteAnglesite

Physical Properties of Arsenbrackebuschite

Lustre:Sub-Adamantine, Sub-Vitreous, Resinous, Waxy
Diaphaneity (Transparency):Transparent, Translucent
Colour:Light amber yellow to red brown.
Streak:Light brownish yellow
Hardness (Mohs):4½
Tenacity:Brittle
Cleavage:Perfect
{010}
Density (calculated):6.54 g/cm3

Crystallography of Arsenbrackebuschite

Crystal System:Monoclinic
Class (H-M):2/m - Prismatic
Space Group:P2/m {P1 1 2/m} {P2/m} {P1 2/m 1}
Space Group Setting:P2/m
Cell Parameters:a = 7.763Å, b = 6.046Å, c = 9.022Å
β = 112.5°
Ratio:a:b:c = 1.284 : 1 : 1.492
Unit Cell Volume:V 391.22 ų (Calculated from Unit Cell)
Z:2
Morphology:Wedge-shaped crystals, also elongated
X-Ray Powder Diffraction:
d-spacingIntensity
4.92 (25)
3.68 (25)
3.44 (30)
3.268 (90)
3.02 (100)
3.012 (100)
2.777 (60)
2.313 (30)
2.133 (30)
Comments:ICDD 29-1428; strongest lines may appear as a single diffuse line

Optical Data of Arsenbrackebuschite

Type:Biaxial (-)
RI values: nα = 2.000 nγ = 2.040
2V:Measured: 30°
Birefringence:0.04
Maximum Birefringence:δ = 0.040

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Moderate
Dispersion:relatively weak
Comments:RI difficult to measure; X' < 2.00, Z" > 2.04

Chemical Properties of Arsenbrackebuschite

Formula:
Pb
 
2
Fe
3+
 
(AsO
 
4
)
 
2
(OH)


May contain minor Zn replacing Fe; charge-balance by H2O substituting for OH.
Essential elements:As, Fe, H, O, Pb
All elements listed in formula:As, Fe, H, O, Pb

Relationship of Arsenbrackebuschite to other Species

Member of:Brackebuschite Group
Other Members of Group:

- +
Arsentsumebite
Pb
 
2
Cu(AsO
 
4
)(SO
 
4
)(OH)
Bearthite
Ca
 
2
Al(PO
 
4
)
 
2
(OH)
Brackebuschite
Pb
 
2
(Mn
3+
 
,Fe
3+
 
)(VO
 
4
)
 
2
(OH)
Bushmakinite
Pb
 
2
Al(PO
 
4
)(VO
 
4
)(OH)
Calderónite
Pb
 
2
Fe
3+
 
(VO
 
4
)
 
2
(OH)
Feinglosite
Pb
 
2
(Zn,Fe
2+
 
)(AsO
 
4
)(SO
 
4
)(OH)
Gamagarite
Ba
 
2
(Fe
3+
 
,Mn
3+
 
)(VO
 
4
)
 
2
(OH)
Goedkenite
(Sr,Ca)
 
2
Al(PO
 
4
)
 
2
(OH)
Tokyoite
Ba
 
2
(Mn
3+
 
,Fe
3+
 
)(VO
 
4
)
 
2
(OH)
Tsumebite
Pb
 
2
Cu(PO
 
4
)(SO
 
4
)(OH)
Related Minerals - Nickel-Strunz Grouping):

- +
8.BG.05Arsentsumebite
Pb
 
2
Cu(AsO
 
4
)(SO
 
4
)(OH)
8.BG.05Bearthite
Ca
 
2
Al(PO
 
4
)
 
2
(OH)
8.BG.05Brackebuschite
Pb
 
2
(Mn
3+
 
,Fe
3+
 
)(VO
 
4
)
 
2
(OH)
8.BG.05Gamagarite
Ba
 
2
(Fe
3+
 
,Mn
3+
 
)(VO
 
4
)
 
2
(OH)
8.BG.05Goedkenite
(Sr,Ca)
 
2
Al(PO
 
4
)
 
2
(OH)
8.BG.05UM1994-19-PO:CuHMoPb
Pb
 
2
Cu(PO
 
4
)(MoO
 
4
,AsO
 
4
,CrO
 
4
,GaO
 
4
)(OH)
8.BG.05Tsumebite
Pb
 
2
Cu(PO
 
4
)(SO
 
4
)(OH)
8.BG.05Feinglosite
Pb
 
2
(Zn,Fe
2+
 
)(AsO
 
4
)(SO
 
4
)(OH)
8.BG.05Bushmakinite
Pb
 
2
Al(PO
 
4
)(VO
 
4
)(OH)
8.BG.05Tokyoite
Ba
 
2
(Mn
3+
 
,Fe
3+
 
)(VO
 
4
)
 
2
(OH)
8.BG.05Calderónite
Pb
 
2
Fe
3+
 
(VO
 
4
)
 
2
(OH)
8.BG.10Mélonjosephite
CaFe
2+
 
Fe
3+
 
(PO
 
4
)
 
2
(OH)
8.BG.15Tancoite
LiNa
 
2
Al(PO
 
4
)(HPO
 
4
)(OH)

Other Names for Arsenbrackebuschite

Synonyms:
ArsenbrackenbuschiteIMA1977-014
Other Languages:
German:Arsenbrackebuschit
Arsenbrackenbuschit
Russian:Арсенбракебушит
Spanish:Arsenbrackebuschita
Arsenbrackenbuschita

Other Information

Fluorescence in UV light:Not fluorescent
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 Arsenbrackebuschite

Reference List:

- +
American Mineralogist: 63: 1282.

Abraham, K., Kautz, K., Tillmanns, E. and Walenta, K. (1978): Arsenbrackebuschite, Pb2(Fe,Zn)(OH,H2O)[AsO4]2, a new arsenate mineral. Neues Jahrb. Mineral., Monatsh. 1978, 193-196.

Tschermaks Mineralogische und Petrographische Mitteilungen: 25: 153-163.

Internet Links for Arsenbrackebuschite

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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Arsenbrackebuschite details from Handbook of Mineralogy (PDF)
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    • Localities for Arsenbrackebuschite

    The map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
    Hide Locality List
    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Austria
     
    • Carinthia
      • Karawanken
        • Finkenstein
          • Mallestiger Mittagskogel
    		A.Pichler (2003)
    • Styria
      • Fischbacher Alpen
        • Krieglach
          • Teschengraben
    		Tomazic, P. (1999): Der Blei-Zink Bergbau Freßnitzkogel - Stanglalm, Mürztal, Steiermark, Österreich. Annalen, Journal of science and art, 1, 57-62
    • Tyrol
      • North Tyrol
        • Inn valley
          • Brixlegg - Schwaz area
            • Brixlegg - Rattenberg
    		Poeverlein, Schnorrer
              • Geyer - Silberberg District
                • Silberberg
    		Schnorrer, G. and Poeverlein, R. (2002) Schwaz-Brixlegg-Fundstellen: 2. Die Minerale des Stockerstollens bei Brixlegg in Tirol. Aufschluss, 53, 209-228.
    France
     
    • Auvergne
      • Allier
        • Ébreuil
          • Échassières
    		Uwe Kolitsch (EDS analysis), to be published
    Kolitsch, U., Gröbner, J. & Brandstätter, F. (2009): Neufunde von Les Montmins, Allier, Frankreich. Lapis 34 (11), 24-32; 54 (in German).
    • Rhône-Alpes
      • Rhône
        • Beaujeu
          • Les Ardillats
    		Favreau G., Legris J-R., Dardillac M. (1996), La Verrière (Rhône): Histoire et Minéralogie, Le Cahier des Micromonteurs, n°3, pp:3-28
    Germany
     
    • Baden-Württemberg
      • Black Forest
        • Lahr
          • Reichenbach
            • Schuttertal
    		Lapis 21(12), 42-43 (1996)
        • Wieden
    		Lapis 23(12), 46 (1998)
        • Wolfach
          • Oberwolfach
            • Rankach valley
    		Fortschr.Mineral.(1976) 54, Beiheft 1, p.38; WALENTA, K. (1999): Neue Mineralfunde von der Grube Clara. 8. Folge, 2. Teil. Lapis 24 (12), 40-44; U. Kolitsch, J. Gröbner, G. Blaß and H.-W. Graf (2007): Neufunde aus der Grube Clara im mittleren Schwarzwald (III): Cerianit-(Ce), Dravit, Florencit-(La), Gilmarit, Olenit und Scotlandit. Lapis 32, 19-23, 70.
    • Hesse
      • Odenwald
        • Lautertal (Odenwald)
          • Gadernheim
    		S Wolfsried collection
          • Reichenbach
            • Hohenstein
    		Lapis 25(2), 13-30 (2000)
    • Saxony
      • Erzgebirge
        • Niederschlag-Bärenstein District
          • Bärenstein
            • Niederschlag
    		Schlegel, F. (2001): Erstfund aus Sachsen: Arsenbrackebuschit ! (Bemerkenswerter Eigenfund). Lapis, 26 (5), 34-35.
    Mexico
     
    • Durango
      • Mun. de Mapimí
        • Mapimí
    		Robert Meyer. ID by Marcus Origlieri, personal communication
    Namibia
     
    • Otjikoto (Oshikoto) Region
      • Tsumeb
    		Fortschr.Mineral.(1976) 54, Beiheft 1, p.38
    USA
     
    • California
      • San Bernardino Co.
        • Clark Mts (Clark Mountain Range)
          • Clark Mountain District
            • Pactolus
              • Mohawk Hill
    		www.mineralsocal.org
    • Montana
      • Granite Co.
        • Philipsburg District (Flint Creek District)
          • John Long Mts
            • Flint Creek Valley
    		Collection of J.Dagenais
    • New Mexico
      • Grant Co.
        • Hachita
    		Anthony, Bideaux, Bladh, Nichols: Handbook of Mineralogy, Vol. IV
    Mineral and/or Locality
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