Mineralogy Database

Schirmerite Mineral Data

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General Schirmerite Information

Help on Chemical  Formula: Chemical Formula: Ag3Pb3Bi9S18 to Ag3Pb6Bi7S18
Help on Composition: Composition: Molecular Weight = 2,985.26 gm
   Silver   10.84 %  Ag
   Bismuth  49.00 %  Bi
   Lead     20.82 %  Pb
   Sulfur   19.33 %  S
           100.00 % 
Help on Empirical Formula: Empirical Formula: Ag3Pb3Bi7S18
Help on Environment: Environment: Disseminated through quartz.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1874
Help on Locality: Locality: Treasury lode, Geneva district, Park Co., Colorado, USA. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for J. H. L. Schirmer, superintendent of the U. S. Mint, Denver, Colorado, USA.
Help on Name Pronunciation: Name Pronunciation: Schirmerite + Pronunciation Say SCHIRMERITE
Help on Synonym: Synonym: Beegerite - mixture of schirmerite and matildite

Schirmerite Image

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Comments: Gray metallic granular schirmerite in quartz.
Location: Grand Trunk, Geneva District, Park County, Colorado, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Schirmerite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.3029:1:0.0905
Help on Cell Dimensions: Cell Dimensions: a = 13.45, b = 44.4, c = 4.02, Z = 4; V = 2,400.66 Den(Calc)= 8.26
Help on Crystal System: Crystal System: Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: Bbmm
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.82(1), 3.27(0.7), 1.961(0.6),

Physical Properties of Schirmerite

Help on Cleavage: Cleavage: None
Help on Color: Color: Lead gray, Gray, Iron black.
Help on Density: Density: 6.74
Help on Diaphaneity: Diaphaneity: Opaque
Help on Fracture: Fracture: Brittle - Uneven - Very brittle fracture producing uneven fragments.
Help on Habit: Habit: Massive - Granular - Common texture observed in granite and other igneous rock.
Help on Hardness: Hardness: 2 - Gypsum
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Metallic
Help on Magnetism: Magnetism: Nonmagnetic

Optical Properties of Schirmerite

Help on RL Anisotrophism: RL Anisotrophism: Weak in air, distinct to strong in oil, in gray to black.
Help on RL Color: RL Color: White.
Help on RL Pleochroism: RL Pleochroism: Weak in air, weak to distinct in oil.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Schirmerite in Air
λ R1 R2  ∑ R1(λ)   ∑ R2(λ) 
 400 nm   42.60   46.60 
 420 nm   43.00   47.30 
 440 nm   43.40   48.00 
 460 nm   43.60   48.20 
 480 nm   43.50   48.20 
 500 nm   43.20   48.00 
 520 nm   42.90   47.70 
 540 nm   42.40   47.20 
 560 nm   42.00   46.70 
 580 nm   41.70   46.20 
 600 nm   41.40   46.00 
 620 nm   41.20   45.70 
 640 nm   41.10   45.60 
 660 nm   41.00   45.50 
 680 nm   40.90   45.30 
 700 nm   40.90   45.10 
Calculated Relative Intensity Colors of Schirmerite in Air
   0%   30%   60%   90% 100% 120% 150% 180% 210% 220%

Calculated Properties of Schirmerite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=6.95 gm/cc
note: Specific Gravity of Schirmerite =8.26 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.04
Boson Index = 0.96
Help on Photoelectric: Photoelectric: PESchirmerite =1,347.60 barns/electron
U=PESchirmerite x rElectron Density=9,366.52 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Schirmerite is Not Radioactive

Schirmerite Classification

Help on  Dana Class: Dana Class: (03)Sulfides - Sulfosalts
  (03.05)where 2.5 < z/y < 3 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals
  (03.05.05)Dana Group Schirmerite Ag3Pb3Bi9S18toAg3Pb6Bi7S18 Bbmm 2/m 2/m 2/m
Help on  Strunz Class: Strunz Class: 02.JB.40d 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.40d Schirmerite Ag3Pb3Bi9S18toAg3Pb6Bi7S18 Bbmm 2/m 2/m 2/m

Other Schirmerite Information

Help on References: References: NAME( Ford32) PHYS. PROP.(Dana8) OPTIC PROP.(AntBidBlaNic1)
Help on See Also: See Also: Links to other databases for Schirmerite :
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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Print or Cut-and-Paste your Schirmerite Specimen Label here :


Ag3Pb3Bi9S18 to Ag3Pb6Bi7S18
Dana No: Strunz No: 02.JB.40d





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