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Danielsite Mineral Data
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General Danielsite Information
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 Chemical Formula: |
(Cu,Ag)14HgS8 |
| Composition: |
Molecular Weight = 1,524.05 gm |
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Copper 41.70 % Cu |
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Silver 28.31 % Ag |
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Mercury 13.16 % Hg |
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Sulfur 16.83 % S |
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______ |
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100.00 % |
| Empirical Formula: |
Cu10Ag4HgS8 |
| Environment: |
In a gossen pod in a quartz vein, as a weathering product derived from other sulfides. |
| IMA Status: |
Approved IMA 1987 |
| Locality: |
Coppin Pool, WA, Australia. Link to MinDat.org Location Data. |
| Name Origin: |
Named for John L. Daniels (1931-), who collected the mineral. |
| Name Pronunciation: |
Danielsite + Pronunciation  |
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Danielsite Image |
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Images:
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Danielsite
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 |
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Danielsite Crystallography
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| Axial Ratios: |
a:b:c =1.0505:1:1.9777 |
| Cell Dimensions: |
a = 9.644, b = 9.18, c = 18.156, Z = 4; V = 1,607.39 Den(Calc)= 6.30 |
| Crystal System: |
Orthorhombic Space Group: Unk |
| X Ray Diffraction: |
By Intensity(I/Io): 2.622(1), 1.875(0.6), 1.959(0.6), |
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Physical Properties of Danielsite
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| Color: |
Gray, Steel gray. |
| Diaphaneity: |
Opaque |
| Fracture: |
Brittle - Generally displayed by glasses and most non-metallic minerals. |
| Habit: |
Microscopic Crystals - Crystals visible only with microscopes. |
| Hardness: |
2-2.5 - Gypsum-Finger Nail |
| Luster: |
Metallic |
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Optical Properties of Danielsite
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| RL Anisotrophism: |
Moderate, in shades of gray. |
| RL Color: |
Gray. |
| Reflectivity |
Standardized Intensity (100%) Reflection Spectra of Danielsite in Air
| λ |
R1 |
R2 |
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∑ R1(λ) |
∑ R2(λ) |
| 470 nm |
32.00 |
34.00 |
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| 546 nm |
30.00 |
31.00 |
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| 589 nm |
28.00 |
30.00 |
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| 650 nm |
27.00 |
29.00 |
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Calculated Relative Intensity Colors of Danielsite in Air
Relative
Intensity |
0% |
40% |
80% |
100% |
120% |
160% |
200% |
240% |
280% |
320% |
| R1 |
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| R2 |
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Calculated Properties of Danielsite
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| Electron Density: |
Bulk Density (Electron Density)=5.67 gm/cc
note: Specific Gravity of Danielsite =6.30 gm/cc.
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| Fermion Index: |
Fermion Index = 0.04
Boson Index = 0.96 |
| Photoelectric: |
PEDanielsite = 299.05 barns/electron
U=PEDanielsite x rElectron Density=1,696.04 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Danielsite is Not Radioactive |
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Danielsite Classification
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| Dana Class: |
02.16.07.02 (02)Sulfides - Including Selenides and Tellurides |
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(02.16)with miscellaneous formulae |
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(02.16.07)Dana Group |
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02.16.07.01 Balkanite Cu9Ag5HgS8 P 222 ? 2 2 2 |
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02.16.07.02 Danielsite (Cu,Ag)14HgS8 Unk Ortho |
| Strunz Class: |
02.BD.15 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf |
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02.B - Metal Sulfides, M:S > 1:1 (mainly 2:1) |
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02.BD -With Hg, Tl |
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02.BD.15 Balkanite Cu9Ag5HgS8 P 222 ? 2 2 2 |
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02.BD.15 Danielsite (Cu,Ag)14HgS8 Unk Ortho |
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Other Danielsite Information
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| References: |
NAME( Dana8) PHYS. PROP.(Am.Min.,Vol.72,p401-403,1987) OPTIC PROP.(AntBidBlaNic1) |
| 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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Print or Cut-and-Paste your Danielsite Specimen Label here :
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Danielsite
(Cu,Ag)14HgS8
Dana No: 02.16.07.02 Strunz No: 02.BD.15
Locality:
Notes:
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