Dadsonite (original) (raw)
A valid IMA mineral species
About DadsoniteHide
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Name:
Named in 1969 by John Leslie Jambor in honor of Alexander Stewart Dadson (1906, Canada - 1958, Canada), exploration geologist and mineralogist who made significant contributions to the mining development of the Giant Mine.
Co-Type Localities:
ⓘ Giant Yellowknife Mine (Giant Mine), Yellowknife, North Slave Region, Northwest Territories, Canada
ⓘ Taylor Pit, Huntingdon Township, Centre Hastings Municipality, Hastings County, Ontario, Canada
ⓘ Graf Jost-Christian Mine, Wolfsberg, Sangerhausen, Mansfeld-Südharz, Saxony-Anhalt, Germany
ⓘ Red Bird Mine, Antelope Springs Mining District, Pershing County, Nevada, USA
Unique IdentifiersHide
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Long-form identifier:
mindat:1:1:1213:9
bd6acd9b-0e69-49f8-87c4-6ecd32b960c7
IMA Classification of DadsoniteHide
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Type description reference:
Classification of DadsoniteHide
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2.HC.30
2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
H : Sulfosalts of SnS archetype
C : With only Pb
3.6.8.1
3 : SULFOSALTS
6 : 2 < ø < 2.49
6.5.9
6 : Sulphosalts - Sulphostannates, Sulphogermanates,Sulpharsenates, Sulphantimonates, Sulphovanadates and Sulphohalides
5 : Sulphohalides
Mineral SymbolsHide
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As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference |
|---|---|---|
| Dad | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of DadsoniteHide
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Hardness:
VHN15=226 - 279 kg/mm2 - Vickers
Density:
5.68 g/cm3 (Measured) 5.51 g/cm3 (Calculated)
Optical Data of DadsoniteHide
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Anisotropism:
Strong to distinct in greenish gray
Reflectivity:
| Wavelength | R1 | R2 |
|---|---|---|
| 400nm | 44.0% | 46.6% |
| 420nm | 42.3% | 45.8% |
| 440nm | 40.8% | 45.1% |
| 460nm | 39.6% | 44.5% |
| 480nm | 39.2% | 44.1% |
| 500nm | 39.1% | 44.0% |
| 520nm | 39.1% | 44.0% |
| 540nm | 39.1% | 43.9% |
| 560nm | 38.9% | 43.0% |
| 580nm | 38.4% | 42.0% |
| 600nm | 37.9% | 41.3% |
| 620nm | 37.3% | 40.6% |
| 640nm | 36.8% | 39.9% |
| 660nm | 36.2% | 39.1% |
| 680nm | 35.7% | 38.1% |
| 700nm | 35.3% | 37.1% |
Graph shows reflectance levels at different wavelengths (in nm). Top of box is 100%. Peak reflectance is 46.6%.
R1 shown in black, R2 shown in red
Colour in reflected light:
White with greenish tint
Internal Reflections:
Blood red in oil
Chemistry of DadsoniteHide
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Mindat Formula:
Pb23Sb25S60Cl
Common Impurities:
As,(Fe)
Crystallography of DadsoniteHide
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Class (H-M):
1 - Pinacoidal
Cell Parameters:
a = 8.276(2) Å, b = 17.392(4) Å, c = 19.505(4) Å
α = 83.527(7)°, β = 77.882(8)°, γ = 89.125(8)°
Ratio:
a:b:c = 0.476 : 1 : 1.121
Morphology:
Acicular needles.
Comment:
Originally assumed to be monoclinic, with a = 19.041, b = 8.226, c = 17.327 A, beta = 96.30°. Desymmetrized OD structure with profuse twinning.
Crystal StructureHide
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X-Ray Powder DiffractionHide
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Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 2.795 Å | (100) |
| 2.069 Å | (92) |
| 3.393 Å | (74) |
| 3.371 Å | (72) |
| 3.713 Å | (51) |
| 2.843 Å | (47) |
| 3.792 Å | (45) |
Geological EnvironmentHide
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Geological Setting:
Hydrothermal veins.
Type Occurrence of DadsoniteHide
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Co-Type Localities:
ⓘ Giant Yellowknife Mine (Giant Mine), Yellowknife, North Slave Region, Northwest Territories, Canada
ⓘ Taylor Pit, Huntingdon Township, Centre Hastings Municipality, Hastings County, Ontario, Canada
ⓘ Graf Jost-Christian Mine, Wolfsberg, Sangerhausen, Mansfeld-Südharz, Saxony-Anhalt, Germany
ⓘ Red Bird Mine, Antelope Springs Mining District, Pershing County, Nevada, USA
General Appearance of Type Material:
Needles and fibrous crystals, resembling steel wool. Individual needles are generally multiple crystals with a length of up to 2 mm, but a thickness of less than 0.1 mm. The needles are striated parallel to the elongation.
Place of Conservation of Type Material:
Canadian Geological Survey, Ottawa, Ontario, Canada.
Royal Ontario Museum, Toronto, Ontario, Canada, number M30905.
National School of Mines, Paris, France.
The Natural History Museum, London, England, number 1972,11.
National Museum of Natural History (Smithsonian), Washington, D.C., USA, number 123240.
Associated Minerals at Type Locality:
Reference:
Jambor, J.L. (1969) Dadsonite (minerals Q and QM), a new lead sulphantimonide. Mineralogical Magazine: 37: 437-441.
Synonyms of DadsoniteHide
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Other Language Names for DadsoniteHide
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Common AssociatesHide
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Associated Minerals Based on Photo Data:
Related Minerals - Strunz-mindat GroupingHide
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Other InformationHide
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Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
Internet Links for DadsoniteHide
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References for DadsoniteHide
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Reference List:
Moëlo, Yves, Makovicky, Emil, Mozgova, Nadejda N., Jambor, John L., Cook, Nigel, Pring, Allan, Paar, Werner, Nickel, Ernest H., Graeser, Stephan, Karup-Møller, Sven, Balic-unic, Tonči, Mumme, William G., Vurro, Filippo, Topa, Dan (2008) Sulfosalt systematics: a review. Report of the sulfosalt sub-committee of the IMA Commission on Ore Mineralogy. European Journal of Mineralogy, 20 (1) 7-62 doi:10.1127/0935-1221/2008/0020-1778
Localities for DadsoniteHide
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This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the 
symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
Locality ListHide
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- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for references and further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. 
- Good crystals or important locality for species. 
- World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).
All localities listed without proper references should be considered as questionable.