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Leogangite Mineral Data
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General Leogangite Information
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 Chemical Formula: |
Cu10(AsO4)4(SO4)(OH)6•8(H2O) |
| Composition: |
Molecular Weight = 1,543.39 gm |
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Copper 40.93 % Cu 51.23 % CuO |
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Silicon 0.07 % Si 0.16 % SiO2 |
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Arsenic 19.22 % As 29.49 % As2O5 |
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Hydrogen 1.55 % H 13.88 % H2O |
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Sulfur 2.06 % S 4.62 % S2O5 |
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Oxygen 36.17 % O |
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______ ______ |
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100.00 % 99.37 % = TOTAL OXIDE |
| Empirical Formula: |
Cu9.94As3.96Si0.04O16S0.99O4(OH)6•8.89(H2O) |
| Environment: |
In ore-bearing dolomite breccia. |
| IMA Status: |
Approved IMA 2004 (Dana # Added) |
| Locality: |
A mine dump of the Danielstollen, in the Schwarzleo valley about 10 km west-southwest of Leogang, Salzburg, Austria. Link to MinDat.org Location Data. |
| Name Origin: |
Named for the locality. |
| Synonym: |
IMA1998-032 |
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Leogangite Image |
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Images:
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Leogangite
Comments: Cotype sample of leogangite (A. Strasser) showing the thin tabular habit parallel to (100). (Mineralogy and Petrology, 81:190).
Location: Mine dumps of the Danielstollen and Inschlagalm in the Schwarzleo valley, both part of the polymetallic ore district of Leogang, Salzburg province, Austria.
Scale: See Image.
© Mineralogy and Petrology |
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Leogangite Crystallography
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| Axial Ratios: |
a:b:c =1.766:1:0.8696 |
| Cell Dimensions: |
a = 21.77, b = 12.327, c = 10.72, Z = 4; beta = 92.85° V = 2,873.25 Den(Calc)= 3.57 |
| Crystal System: |
Monoclinic - Prismatic H-M Symbol (2/m) Space Group: C 2/c |
| X Ray Diffraction: |
By Intensity(I/Io): 10.85(1)(200), 2.63(0.6)(513,204), 3.625(0.5)(600),
5.44(0.5)(400), 2.672(0.4)(042), 3.09(0.4)(023), 1.618(0.3)(155), 3.728(0.3)(402), 4.9(0.3)(202), |
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Physical Properties of Leogangite
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| Cleavage: |
{100} Perfect |
| Color: |
Green, Bluish green. |
| Diaphaneity: |
Transparent |
| Fracture: |
Brittle - Generally displayed by glasses and most non-metallic minerals. |
| Habit: |
Aggregates - Made of numerous individual crystals or clusters. |
| Habit: |
Platy - Sheet forms (e.g. micas). |
| Luster: |
Vitreous (Glassy) |
| Streak: |
light green |
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Optical Properties of Leogangite
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| Gladstone-Dale: |
CI calc= -0.062 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1937,KC= 0.1824
Ncalc = 1.65 |
| Optical Data: |
Biaxial (-), a=1.59, b=1.74, g=1.744, bire=0.1540, 2V(Calc)=16, 2V(Meas)=18. Dispersion r > v weak. |
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Calculated Properties of Leogangite
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| Electron Density: |
Bulk Density (Electron Density)=3.42 gm/cc
note: Specific Gravity of Leogangite =3.57 gm/cc.
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| Fermion Index: |
Fermion Index = 0.0003641938
Boson Index = 0.9996358062 |
| Photoelectric: |
PELeogangite = 31.20 barns/electron
U=PELeogangite x rElectron Density= 106.56 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Leogangite is Not Radioactive |
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Leogangite Classification
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| Dana Class: |
43.05.23.01 (43)Compound Phosphates, etc. |
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(43.05)(Hydrated Compound Anions With Hydroxyl or Halogen) |
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(43.05.23)Dana Group |
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43.05.23.01 Leogangite! Cu10(AsO4)4(SO4)(OH)6•8(H2O) C 2/c 2/m |
| Strunz Class: |
08.CC.15 08 - PHOSPHATES, ARSENATES, VANADATES |
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08.C - Phosphates without Additional Anions, with H2O |
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08.CC -With only medium-sized cations, RO4:H2O = 1:1.5 |
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08.CC.15 Leogangite! Cu10(AsO4)4(SO4)(OH)6•8(H2O) C 2/c 2/m |
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Other Leogangite Information
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| References: |
NAME( CanMin, 42:1912) PHYS. PROP.(MinPet, 81:187) OPTIC PROP.(CanMin, 42:1912) |
| See Also: |
Links to other databases for Leogangite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info
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Leogangite
Cu10(AsO4)4(SO4)(OH)6•8(H2O)
Dana No: 43.05.23.01 Strunz No: 08.CC.15
Locality:
Notes:
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