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Dadsonite Mineral Data
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General Dadsonite Information
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 Chemical Formula: |
Pb21Sb23S55Cl |
| Composition: |
Molecular Weight = 8,950.53 gm |
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Antimony 31.29 % Sb |
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Lead 48.61 % Pb |
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Sulfur 19.70 % S |
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Chlorine 0.40 % Cl |
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______ |
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100.00 % |
| Empirical Formula: |
Pb21Sb23S55Cl |
| Environment: |
In hydrothermal veins with other sulfides and lead sulfosalt minerals. |
| IMA Status: |
Approved IMA 1969 |
| Locality: |
Giant property, Yellowknife, NWT, Canada. Link to MinDat.org Location Data. |
| Name Origin: |
Named for Alexander S. Dadson (1906-1958), Canadian mineralogist. |
| Name Pronunciation: |
Dadsonite + Pronunciation  |
| Synonym: |
IMA1968-011 |
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Dadsonite Image |
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Images:
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Dadsonite Crystallography
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| Axial Ratios: |
a:b:c =4.635:1:4.2165 |
| Cell Dimensions: |
a = 19.05, b = 4.11, c = 17.33, Z = 0.5; beta = 96.333° V = 1,348.58 Den(Calc)= 5.51 |
| Crystal System: |
Monoclinic Space Group: P 2,Pm,P 2/m |
| X Ray Diffraction: |
By Intensity(I/Io): 3.38(1), 2.84(0.7), 3.78(0.7), |
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Physical Properties of Dadsonite
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| Color: |
Lead gray, Gray. |
| Density: |
5.68 - 5.76, Average = 5.72 |
| Diaphaneity: |
Opaque |
| Habit: |
Fibrous - Crystals made up of fibers. |
| Hardness: |
2.5 - Finger Nail |
| Luster: |
Metallic |
| Streak: |
black |
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Optical Properties of Dadsonite
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| RL Anisotrophism: |
Distinct to strong, in greenish gray. |
| RL Color: |
White with a greenish tint, with blood-red internal reflections in oil. |
| Reflectivity |
Standardized Intensity (100%) Reflection Spectra of Dadsonite in Air
| λ |
R1 |
R2 |
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∑ R1(λ) |
∑ R2(λ) |
| 400 nm |
44.00 |
46.60 |
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| 420 nm |
42.30 |
45.80 |
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| 440 nm |
40.80 |
45.10 |
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| 460 nm |
39.60 |
44.50 |
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| 480 nm |
39.20 |
44.10 |
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| 500 nm |
39.10 |
44.00 |
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| 520 nm |
39.10 |
44.00 |
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| 540 nm |
39.10 |
43.90 |
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| 560 nm |
38.90 |
43.00 |
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| 580 nm |
38.40 |
42.00 |
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| 600 nm |
37.90 |
41.30 |
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| 620 nm |
37.30 |
40.60 |
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| 640 nm |
36.80 |
39.90 |
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| 660 nm |
36.20 |
39.10 |
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| 680 nm |
35.70 |
38.10 |
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| 700 nm |
35.30 |
37.10 |
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Calculated Relative Intensity Colors of Dadsonite in Air
Relative
Intensity |
0% |
30% |
60% |
90% |
100% |
120% |
150% |
180% |
210% |
240% |
| R1 |
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| R2 |
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Calculated Properties of Dadsonite
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| Electron Density: |
Bulk Density (Electron Density)=4.67 gm/cc
note: Specific Gravity of Dadsonite =5.51 gm/cc.
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| Fermion Index: |
Fermion Index = 0.1
Boson Index = 0.9 |
| Photoelectric: |
PEDadsonite = 990.55 barns/electron
U=PEDadsonite x rElectron Density=4,624.62 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Dadsonite is Not Radioactive |
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Dadsonite Classification
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| Dana Class: |
03.06.08.01 (03)Sulfides - Sulfosalts |
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(03.06)where 2 < z/y < 2.49 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals |
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(03.06.08)Dana Group |
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03.06.08.01 Dadsonite Pb21Sb23S55Cl P 2,Pm,P 2/m Mono |
| Strunz Class: |
02.HC.30 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf |
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02.H - Sulfosalts of SnS Archetype |
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02.HC -With only Pb |
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02.HC.30 Dadsonite Pb21Sb23S55Cl P 2,Pm,P 2/m Mono |
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Other Dadsonite Information
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| References: |
NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(AntBidBlaNic1) |
| See Also: |
Links to other databases for Dadsonite :
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
15 - WWW-MINCRYST
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Print or Cut-and-Paste your Dadsonite Specimen Label here :
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Dadsonite
Pb21Sb23S55Cl
Dana No: 03.06.08.01 Strunz No: 02.HC.30
Locality:
Notes:
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