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Mallestigite Mineral Data

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General Mallestigite Information

Help on Chemical  Formula: Chemical Formula: Pb3Sb+++++(SO4)(AsO4)(OH)6•3(H2O)
Help on Composition: Composition: Molecular Weight = 1,135.63 gm
   Antimony  10.18 %  Sb   13.53 % Sb2O5
   Arsenic    5.81 %  As    8.91 % As2O5
   Hydrogen   1.07 %  H     9.53 % H2O
   Lead      55.83 %  Pb   60.14 % PbO
   Sulfur     3.16 %  S     7.90 % SO3
   Oxygen    23.95 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Pb3.06Sb0.95(SO4)1.12(AsO4)0.88(OH)5.99•3.01(H2O)
Help on Environment: Environment: In narrow fractures of limstones formed from the weathering of galena and tetrahedrite. The antimony dominant analog of fleischerite.
Help on IMA Status: IMA Status: Approved IMA 2002 (Dana # Added)
Help on Locality: Locality: Dump of a Cu-Pp-Zn mine 1 km NW of Mallestiger Mittagskogel, Finkenstein, Villach, K�rnten, Austria Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after the locality.
Help on Synonym: Synonym: IMA1996-043

Mallestigite Image

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Comments: Colorless prismatic crystals of mallestigite.
Location: Mallestiger Mittagskogel, Finkenstein, Villach, Carinthia, Austria. Scale: Picture size 1.5 mm.
© Thomas Witzke / Abraxas-Verlag

Mallestigite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:1.24166
Help on Cell Dimensions: Cell Dimensions: a = 8.938, c = 11.098, Z = 2; V = 767.81 Den(Calc)= 4.91
Help on Crystal System: Crystal System: Hexagonal - Trapezohedral H-M Symbol (6 2 2) Space Group: P 63
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.655(1)(201), 3.481(0.8)(112), 2.675(0.62)(203),6.35(0.44)(101), 2.235(0.35)(220), 3.175(0.31)(202), 7.74(0.25)(100), 1.741(0.24)(224),

Physical Properties of Mallestigite

Help on Cleavage: Cleavage: None
Help on Color: Color: Colorless.
Help on Diaphaneity: Diaphaneity: Transparent
Help on Fracture: Fracture: Brittle - Splintery - Brittle fracture leaving splintery fragments.
Help on Habit: Habit: Euhedral Crystals - Occurs as well-formed crystals showing good external form.
Help on Hardness: Hardness: 4 - Fluorite
Help on Luster: Luster: Adamantine
Help on Streak: Streak: white

Optical Properties of Mallestigite

Help on Gladstone-Dale: Gladstone-Dale: CI calc= 0.016 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.159,KC= 0.1615
Ncalc = 1.79
Help on Optical Data: Optical Data: Uniaxial (+), w=1.76, e=1.801, bire=0.0410.

Calculated Properties of Mallestigite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=4.27 gm/cc
note: Specific Gravity of Mallestigite =4.91 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.12
Boson Index = 0.88
Help on Photoelectric: Photoelectric: PEMallestigite =1,023.43 barns/electron
U=PEMallestigite x rElectron Density=4,374.78 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Mallestigite is Not Radioactive

Mallestigite Classification

Help on  Dana Class: Dana Class: (31)Hydrated Sulfates Containing Hydroxyl or Halogen
  (31.07)where (A+ B++)2 (XO4) Zq�x(H2O)
  (31.07.06)Despujolsite Group Despujolsite Ca3Mn(SO4)2(OH)6•3(H2O) P 62c 6 m2 Schaurteite Ca3Ge(SO4)2(OH)6•3(H2O) P 62c 6 m2 Fleischerite Pb3Ge(SO4)2(OH)6•3(H2O) P 63/mmc 6/m 2/m 2/m Mallestigite! Pb3Sb(SO4)(AsO4)(OH)6•3(H2O) P 63 6 2 2
Help on  Strunz Class: Strunz Class: 07.DF.25 07 - SULFATES (SELENATES, TELLURATES)
  07.D - Sulfates (selenates, etc.) with additional anions, with H2O
  07.DF -With large and medium-sized cations
07.DF.25 Despujolsite Ca3Mn(SO4)2(OH)6•3(H2O) P 62c 6 m2
07.DF.25 Fleischerite Pb3Ge(SO4)2(OH)6•3(H2O) P 63/mmc 6/m 2/m 2/m
07.DF.25 Mallestigite! Pb3Sb(SO4)(AsO4)(OH)6•3(H2O) P 63 6 2 2
07.DF.25 Schaurteite Ca3Ge(SO4)2(OH)6•3(H2O) P 62c 6 m2

Other Mallestigite Information

Help on References: References: NAME( MinRec,35:357) PHYS. PROP.(CanMin, 41:1314) OPTIC PROP.(MinRec,35:357)
Help on See Also: See Also: Links to other databases for Mallestigite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - Handbook of Mineralogy (MinSocAm)
7 - Handbook of Mineralogy (UofA)
8 - MinDAT
9 - Mineralienatlas (Deutsch)
10 - Online Mineral Museum
11 - QUT Mineral Atlas
12 - Ruff.Info

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Dana No: Strunz No: 07.DF.25





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