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Leogangite

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Vogelhalt District, Vogel Alp, Schwarzleograben, Hütten, Leogang, Saalfelden, Salzburg, Austria
© Christian Rewitzer

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Formula:
Cu
 
10
[(OH)
 
6
|SO
 
4
|(AsO
 
4
)
 
4
] · 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.
This page provides mineralogical data about Leogangite.

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 (B1 1 2/b) [C2/c] {C1 2/c 1}
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)

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
[(OH)
 
6
|SO
 
4
|(AsO
 
4
)
 
4
] · 8H
 
2
O
All elements listed in formula:As, Cu, H, O, S
Analyical 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
MnFe
 
2
(PO
 
4
)
 
2
(OH)
 
2
·H
 
2
O
8.CC.05Landesite
Mn
2+
3-x
Fe
3+
x
[(OH)
 
x
|(PO
 
4
)
 
2
] · (3-x)H
 
2
O
8.CC.05Phosphoferrite
(Fe,Mn)
 
3
(PO
 
4
)
 
2
·3H
 
2
O
8.CC.05Reddingite
(Mn,Fe)
 
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

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.

Articles/Blogs about Leogangite

Internet Links for Leogangite

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    Localities for Leogangite

    Hide Locality List
    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.
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    (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
     
    • 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 Mt.
                  • 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.
              • St Gertraudi
                • Großkogel Mt.
    		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
    Germany
     
    • North Rhine-Westphalia
      • Siegerland
        • Müsen
    		Schnorrer, K., Pfeiffer, F. (2008): Leogangit ein neues Mineral von der ehemaligen Grube Wildermann in Müsen im Siegerland, Der Aufschluss, Vol. 59, 405-408
    Mineral and/or Locality
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