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Leogangite

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Formula:
Cu
 
10
(AsO
 
4
)
 
4
(SO
 
4
)(OH)
 
6
· 8H
 
2
O
System:MonoclinicColour:green with a bluish tint
Name:For the type locality in several mines at Schwarzleograben, Hütten, Leogang, Saalfelden, Salzburg, Austria.


Closely related to Unnamed (Leogangite-related mineral) with which it is easily confused.

Classification of Leogangite

IMA status:Approved 1998
Strunz 8th edition ID:7/D.54-40
Nickel-Strunz 10th (pending) edition ID:8.CC.15

8 : PHOSPHATES, ARSENATES, VANADATES
C : Phosphates without additional anions, with H2O
C : With only medium-sized cations, RO4:H2O = 1:1.5
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Type Occurrence of Leogangite

Co-type Localities:Magnesite mine, Inschlag Alp, Schwarzleograben, Hütten, Leogang, Saalfelden, Salzburg, Austria
Daniel adit, Schwarzleo District, Schwarzleograben, Hütten, Leogang, Saalfelden, Salzburg, Austria
General Appearance of Type Material:Aggregates of thin tabular crystals, flattened on {100} and elongated along [010], measuring up to 0.1 mm in length, 0.05 mm in width and 0.01 mm in thickness.
Geological Setting of type material:Alteration product of arsenic-rich fahlore in vugs of a tennantite-bearing dolomite breccia, intergrown with olivenite and malachite.
Associated Minerals at type locality:
TyroliteTennantiteStrashimiritePosnjakiteParnauite
OliveniteMalachiteLangiteEuchroiteDolomite
DevillineBrochantite

Physical Properties of Leogangite

Lustre:Vitreous
Diaphaneity (Transparency):Transparent
Colour:green with a bluish tint
Streak:light green
Cleavage:Perfect
parallel to (100)
Density (calculated):3.55 g/cm3

Crystallography of Leogangite

Crystal System:Monoclinic
Class (H-M):2/m - Prismatic
Space Group:B2/b
Cell Parameters:a = 21.77Å, b = 12.327Å, c = 10.72Å
β = 92.85°
Ratio:a:b:c = 1.766 : 1 : 0.87
Unit Cell Volume:V 2873 ų
Z:4
X-Ray Powder Diffraction:
d-spacingIntensity
10.85 (100)
hkl = (200)
2.630 (60)
5.44 (50)
hkl = (400)
3.625 (50)
hkl = (600)
3.090 (40)
hkl = (023)

Optical Data of Leogangite

Type:Biaxial (-)
RI values: nω = 1.590 nε = 1.740 n = 1.744
2V:Measured: 182°
Maximum Birefringence:δ = 0.150

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:High
Comments:Blue-green to pale green.

Chemical Properties of Leogangite

Formula:
Cu
 
10
(AsO
 
4
)
 
4
(SO
 
4
)(OH)
 
6
· 8H
 
2
O
Simplified for copy/paste:Cu10(AsO4)4(SO4)(OH)6·8H2O
Essential elements:As, Cu, H, O, S
All elements listed in formula:As, Cu, H, O, S
Analytical Data:Composition by microprobe analysis, average formula based on 20 +/- 3 oxygen atoms.
CuO (49.6 - 52.9)
As2O5 (28.5 - 31.1)
SO3 (4.9 - 5.4)
Empirical Formula:
Cu
 
9.94
[(OH)
 
6
|S
 
0.99
O
 
4
|(As
 
0.99
Si
 
0.01
O
 
4
)
 
4
] · 8.89 H
 
2
O
Common Impurities:Si

Relationship of Leogangite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
8.CC.05Garyansellite
(Mg,Fe)
 
3
(PO
 
4
)
 
2
(OH,O) · 1.5H
 
2
O
8.CC.05Kryzhanovskite
(Fe
3+
 
,Mn
2+
 
)
 
3
(PO
 
4
)
 
2
(OH,H
 
2
O)
 
3
8.CC.05Landesite
Mn
2+
3-x
Fe
3+
x
(PO
 
4
)
 
2
(OH)
 
x
· (3-x)H
 
2
O
8.CC.05Phosphoferrite
(Fe
2+
 
,Mn
2+
 
)
 
3
(PO
 
4
)
 
2
· 3H
 
2
O
8.CC.05Reddingite
(Mn
2+
 
,Fe
2+
 
)
 
3
(PO
 
4
)
 
2
· 3H
 
2
O
8.CC.10Kaatialaite
Fe(H
 
2
AsO
 
4
)
 
3
· 5H
 
2
O

Other Names for Leogangite

Synonyms:
IMA1998-032
Other Languages:
German:Leogangit
Russian:Леогангит
Simplified Chinese:水羟硫砷铜石
Traditional Chinese:水羥硫砷銅石

Other Information

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 Leogangite

Reference List:

- +
Lengauer, C. L., Giester, G. and Kirchner, E. (1998): Cu10(AsO4)4(SO4)(OH)6.8H2O, ein neues Mineral aus Leogang, Österreich. Mitt. Österr. Mineral. Ges. 143, 325-327. (in German).

Lengauer, C. L.; Giester, G.; Kirchner, E. (2004): Leogangite, Cu10(AsO4)4(SO4)(OH)6.8H2O, a new mineral from the Leogang mining district, Salzburg province, Austria. Mineralogy and Petrology 81, 187-201.

Internet Links for Leogangite

Search Engines:
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  • External Links:
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  • Look for Leogangite on Mineralien Atlas
  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Mineral Dealers:
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  • Localities for Leogangite

    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.
    (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
    G.Indra
    • Salzburg
      • Saalfelden
        • Leogang
          • Hütten
            • Schwarzleograben
              • Inschlag Alp
    C.L. Lengauer, G. Giester, E. Kirchner: Mineralogy and Petrology 81:187-201 (2004)
              • Schwarzleo District
    C.L. Lengauer, G. Giester, E. Kirchner: Mineralogy and Petrology 81:187-201 (2004)
    Poeverlein, R. (2008): Euchroit und seine Begleiter vom prähistorischen Bergbau, Leogang, Österreich. Lapis, 33 (5), 13-22.
              • Vogel Alp
    Putz, H., Lechner, A., Poeverlein, R. (2005): Leogangit von der Vogelhalt bei Leogang, Salzburg. Lapis 30 (10), 53-55; 90; Brent Thorne collection
    • Tyrol
      • North Tyrol
        • Inn valley
          • Brixlegg - Schwaz area
            • Brixlegg - Rattenberg
              • Geyer - Silberberg District
                • Silberberg
                  • West slope ("Am Geyer")
    R. Poeverlein and J. Gröbner (2007): "Der Bergbau Geyer bei Rattenberg in Tirol und seine Mineralien", Lapis 32(2), 34-38.
    Schnorrer, G. & Poeverlein, R. (2008): Schwaz-Brixlegger Fundstellen. 6. Die Minerale des Gratlspitz bei Brixlegg in Tirol. Aufschluss 59, 7-28.
    C.Auer (2013)
              • St Gertraudi
                • Großkogel (Reither Kogel)
    Putz, H. & Poeverlein, R. (2007): Die Mineralien des Gertraudstollens und seiner Halde in St. Gertraudi, Tirol. Lapis 32 (6), 58-63.
            • Schwaz
              • Ringenwechsel District
                • Weißer Schrofen
    Schnorrer, G., Poeverlein, R. (2007): Die Minerale des Martinstollens am Weißen Schrofen, Der Aufschluss, Vol. 58, 27-40
          • Wörgl
            • Wildschönau
              • Thierbach
                • Graschberg
    R. Poeverlein, J. Gröbner & U. Kolitsch (2010): Mineralien und Bergbau vom Graschberg bei Thierbach in der Tiroler Wildschönau. Lapis 35 (3), 35-40; 54 (in German).
    Germany
     
    • North Rhine-Westphalia
      • Siegerland
        • Müsen
    Schnorrer, G., Pfeiffer, F. (2008): Leogangit, Cu10[(OH)6|(AsO4)4|(SO4)]•8H2O, ein neues Mineral von der ehemaligen Grube Wildermann in Müsen im Siegerland. Der Aufschluss, 59, 405-408.
    Spain
     
    • Catalonia
      • Girona (Gerona)
        • Ripollès
          • Camprodon
            • Rocabruna
    Rosell, J. et al. (2014): UK-112: Leogangita de la mina de les Ferreres, Rocabruna, Camprodon, Girona, Catalunya. Infominer, 61 (3/2014).
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    Copyright © Jolyon Ralph and Ida Chau 1993-2014. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them. Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of thousands of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register.
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