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Leogangite Mineral Data

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General Leogangite Information

Help on Chemical  Formula: Chemical Formula: Cu10(AsO4)4(SO4)(OH)6•8(H2O)
Help on Composition: Composition: Molecular Weight = 1,543.39 gm
   Copper    40.93 %  Cu   51.23 % CuO
   Silicon    0.07 %  Si    0.16 % SiO2
   Arsenic   19.22 %  As   29.49 % As2O5
   Hydrogen   1.55 %  H    13.88 % H2O
   Sulfur     2.06 %  S     4.62 % S2O5
   Oxygen    36.17 %  O
            ______        ______ 
            100.00 %       99.37 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Cu9.94As3.96Si0.04O16S0.99O4(OH)6•8.89(H2O)
Help on Environment: Environment: In ore-bearing dolomite breccia.
Help on IMA Status: IMA Status: Approved IMA 2004 (Dana # Added)
Help on Locality: 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.
Help on Name Origin: Name Origin: Named for the locality.
Help on Synonym: Synonym: IMA1998-032

Leogangite Image

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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

Leogangite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.766:1:0.8696
Help on Cell Dimensions: Cell Dimensions: a = 21.77, b = 12.327, c = 10.72, Z = 4; beta = 92.85° V = 2,873.25 Den(Calc)= 3.57
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: C 2/c
Help on X Ray Diffraction: 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),

Physical Properties of Leogangite

Help on Cleavage: Cleavage: {100} Perfect
Help on Color: Color: Green, Bluish green.
Help on Diaphaneity: Diaphaneity: Transparent
Help on Fracture: Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals.
Help on Habit: Habit: Aggregates - Made of numerous individual crystals or clusters.
Help on Habit: Habit: Platy - Sheet forms (e.g. micas).
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: light green

Optical Properties of Leogangite

Help on Gladstone-Dale: Gladstone-Dale: CI calc= -0.062 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1937,KC= 0.1824
Ncalc = 1.65
Help on Optical Data: 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.

Calculated Properties of Leogangite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.42 gm/cc
note: Specific Gravity of Leogangite =3.57 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0003641938
Boson Index = 0.9996358062
Help on Photoelectric: Photoelectric: PELeogangite = 31.20 barns/electron
U=PELeogangite x rElectron Density= 106.56 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Leogangite is Not Radioactive

Leogangite Classification

Help on  Dana Class: Dana Class: (43)Compound Phosphates, etc.
  (43.05)(Hydrated Compound Anions With Hydroxyl or Halogen)
  (43.05.23)Dana Group Leogangite! Cu10(AsO4)4(SO4)(OH)6•8(H2O) C 2/c 2/m
Help on  Strunz Class: Strunz Class: 08.CC.15 08 - PHOSPHATES, ARSENATES, VANADATES
  08.C - Phosphates without Additional Anions, with H2O
  08.CC -With only medium-sized cations, RO4:H2O = 1:1.5
08.CC.15 Leogangite! Cu10(AsO4)4(SO4)(OH)6•8(H2O) C 2/c 2/m

Other Leogangite Information

Help on References: References: NAME( CanMin, 42:1912) PHYS. PROP.(MinPet, 81:187) OPTIC PROP.(CanMin, 42:1912)
Help on See Also: 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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Dana No: Strunz No: 08.CC.15





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