Mineralogy Database

Marrite Mineral Data

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General Marrite Information

Help on Chemical  Formula: Chemical Formula: PbAgAsS3
Help on Composition: Composition: Molecular Weight = 486.19 gm
   Silver   22.19 %  Ag
   Arsenic  15.41 %  As
   Lead     42.62 %  Pb
   Sulfur   19.79 %  S
           100.00 % 
Help on Empirical Formula: Empirical Formula: PbAgAsS3
Help on Environment: Environment: Of hydrothermal origin with other sulfosalts in dolomite.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1904
Help on Locality: Locality: Lengenbach quarry, Binutal, Valais, Switzerland. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for John Edward Marr (1857-1933), geologist of Canbridge, England.
Help on Name Pronunciation: Name Pronunciation: Marrite Say MARRITE
Help on Synonym: Synonym: ICSD 26835
  PDF 21-1338

Marrite Image

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Comments: A prismatic crystal of marrite with small rounded crystals of galena in quartz.
Location: Lengenbach quarry, Binntal, Wallis (Valais), Switzerland. Scale: Picture size 1.3 mm.
© Thomas Witzke / Abraxas-Verlag

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  Marrite   Jordanite

Comments: Aggregate of gray prismatic crystals of marrite on fine-grained jordanite.
Location: Lengenbach quarry, Binntal, Valais, Switzerland. Scale: Picture high 5 mm.
© Walter Gabriel

Marrite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.575:1:0.473
Help on Cell Dimensions: Cell Dimensions: a = 7.291, b = 12.68, c = 5.998, Z = 4; beta = 91.22° V = 554.39 Den(Calc)= 5.82
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 21/a
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.75(1), 3.45(1), 3(0.7),

Physical Properties of Marrite

Help on Cleavage: Cleavage: None
Help on Color: Color: Lead gray, Steel gray.
Help on Density: Density: 6.23
Help on Diaphaneity: Diaphaneity: Opaque
Help on Fracture: Fracture: Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.
Help on Habit: Habit: Striated - Parallel lines on crystal surface or cleavage face.
Help on Habit: Habit: Tabular - Form dimensions are thin in one direction.
Help on Hardness: Hardness: 3 - Calcite
Help on Luster: Luster: Metallic
Help on Streak: Streak: brownish black

Optical Properties of Marrite

Help on RL Anisotrophism: RL Anisotrophism: Distinct, strong in oil.
Help on RL Color: RL Color: White, with red internal reflections.

Calculated Properties of Marrite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=5.03 gm/cc
note: Specific Gravity of Marrite =5.82 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.09
Boson Index = 0.91
Help on Photoelectric: Photoelectric: PEMarrite = 828.56 barns/electron
U=PEMarrite x rElectron Density=4,165.76 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Marrite is Not Radioactive

Marrite Classification

Help on  Dana Class: Dana Class: (03)Sulfides - Sulfosalts
  (03.04)where z/y > 3 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals
  (03.04.06)Dana Group Marrite PbAgAsS3 P 21/a 2/m Freieslebenite AgPbSbS3 P 21/n 2/m
Help on  Strunz Class: Strunz Class: 02.JB.15 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf
  02.J - Sulfosalts of PbS Archetype
  02.JB -Galena derivatives, with Pb
02.JB.15 Freieslebenite AgPbSbS3 P 21/n 2/m
02.JB.15 Marrite PbAgAsS3 P 21/a 2/m

Other Marrite Information

Help on References: References: NAME( AntBidBlaNic1) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Marrite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info

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Dana No: Strunz No: 02.JB.15





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