Mineralogy Database

Danielsite Mineral Data

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General Danielsite Information

Help on Chemical  Formula: Chemical Formula: (Cu,Ag)14HgS8
Help on Composition: Composition: Molecular Weight = 1,524.05 gm
   Copper   41.70 %  Cu
   Silver   28.31 %  Ag
   Mercury  13.16 %  Hg
   Sulfur   16.83 %  S
           100.00 % 
Help on Empirical Formula: Empirical Formula: Cu10Ag4HgS8
Help on Environment: Environment: In a gossen pod in a quartz vein, as a weathering product derived from other sulfides.
Help on IMA Status: IMA Status: Approved IMA 1987
Help on Locality: Locality: Coppin Pool, WA, Australia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for John L. Daniels (1931-), who collected the mineral.
Help on Name Pronunciation: Name Pronunciation: Danielsite + Pronunciation Say DANIELSITE

Danielsite Image

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Comments: BSE image showing danielsite (D - light gray) and stromeyerite (S - slightly darker) occupy the center of the triangular area and are surrounded by chalcocite (C - black).The anglesite (A) is white.
Location: Pocket of primary sulfides in a quartz vein near Coppin Pool, Western Australia. (AmMin, v72:401). Scale: See Image.
© American Mineralogist

Danielsite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.0505:1:1.9777
Help on Cell Dimensions: Cell Dimensions: a = 9.644, b = 9.18, c = 18.156, Z = 4; V = 1,607.39 Den(Calc)= 6.30
Help on Crystal System: Crystal System: Orthorhombic Space Group: Unk
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.622(1), 1.875(0.6), 1.959(0.6),

Physical Properties of Danielsite

Help on Color: Color: Gray, Steel gray.
Help on Diaphaneity: Diaphaneity: Opaque
Help on Fracture: Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals.
Help on Habit: Habit: Microscopic Crystals - Crystals visible only with microscopes.
Help on Hardness: Hardness: 2-2.5 - Gypsum-Finger Nail
Help on Luster: Luster: Metallic

Optical Properties of Danielsite

Help on RL Anisotrophism: RL Anisotrophism: Moderate, in shades of gray.
Help on RL Color: RL Color: Gray.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Danielsite in Air
λ R1 R2  ∑ R1(λ)   ∑ R2(λ) 
 470 nm   32.00   34.00 
 546 nm   30.00   31.00 
 589 nm   28.00   30.00 
 650 nm   27.00   29.00 
Calculated Relative Intensity Colors of Danielsite in Air
   0%   40%   80% 100% 120% 160% 200% 240% 280% 320%

Calculated Properties of Danielsite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=5.67 gm/cc
note: Specific Gravity of Danielsite =6.30 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.04
Boson Index = 0.96
Help on Photoelectric: Photoelectric: PEDanielsite = 299.05 barns/electron
U=PEDanielsite x rElectron Density=1,696.04 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Danielsite is Not Radioactive

Danielsite Classification

Help on  Dana Class: Dana Class: (02)Sulfides - Including Selenides and Tellurides
  (02.16)with miscellaneous formulae
  (02.16.07)Dana Group Balkanite Cu9Ag5HgS8 P 222 ? 2 2 2 Danielsite (Cu,Ag)14HgS8 Unk Ortho
Help on  Strunz Class: Strunz Class: 02.BD.15 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf
  02.B - Metal Sulfides, M:S > 1:1 (mainly 2:1)
  02.BD -With Hg, Tl
02.BD.15 Balkanite Cu9Ag5HgS8 P 222 ? 2 2 2
02.BD.15 Danielsite (Cu,Ag)14HgS8 Unk Ortho

Other Danielsite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Am.Min.,Vol.72,p401-403,1987) OPTIC PROP.(AntBidBlaNic1)
Help on See Also: See Also: Links to other databases for Danielsite :
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.BD.15





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