Daomanite (original) (raw)
A valid IMA mineral species
Colour:
Steel gray with yellow tint
Specific Gravity:
7.57 (Calculated)
Crystal System:
Orthorhombic
Name:
From the last syllables of its discovery localities: SanDAO and TieMA villages.
This page provides mineralogical data about Daomanite.
Unique IdentifiersHide
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Long-form identifier:
mindat:1:1:1222:1
836728e2-f411-4bcc-8a95-a9802d3bed29
IMA Classification of DaomaniteHide
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Type description reference:
Classification of DaomaniteHide
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2.LA.15
2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
L : Unclassified Sulfosalts
A : Without essential Pb
2.5.7.1
2 : SULFIDES
5 : AmBnXp, with (m+n):p = 3:2
3.12.53
3 : Sulphides, Selenides, Tellurides, Arsenides and Bismuthides (except the arsenides, antimonides and bismuthides of Cu, Ag and Au, which are included in Section 1)
12 : Sulphides etc. of the platinum metals
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 |
|---|---|---|
| Dao | 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 DaomaniteHide
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Colour:
Steel gray with yellow tint
Hardness:
VHN10=169 - 175 kg/mm2 - Vickers
Cleavage:
Distinct/Good
Four sets (from best to least perfect) {100} {010} {001} {110}
Fracture:
Irregular/Uneven, Step-Like
Density:
7.57 g/cm3 (Calculated)
Optical Data of DaomaniteHide
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Reflectivity:
| Wavelength | R1 | R2 |
|---|---|---|
| 400nm | 37.0% | 44.0% |
| 420nm | 37.9% | 44.6% |
| 440nm | 39.1% | 45.0% |
| 460nm | 40.4% | 45.3% |
| 480nm | 41.5% | 45.5% |
| 500nm | 42.2% | 45.6% |
| 520nm | 42.8% | 45.4% |
| 540nm | 42.9% | 45.3% |
| 560nm | 42.8% | 45.2% |
| 580nm | 42.4% | 45.0% |
| 600nm | 41.8% | 44.8% |
| 620nm | 41.2% | 44.7% |
| 640nm | 40.6% | 44.5% |
| 660nm | 40.1% | 44.4% |
| 680nm | 39.8% | 44.0% |
| 700nm | 39.7% | 43.7% |
Graph shows reflectance levels at different wavelengths (in nm). Top of box is 100%. Peak reflectance is 45.6%.
R1 shown in black, R2 shown in red
Colour in reflected light:
Light greenish yellow
Comments:
Gold-yellow and grayish green.
Chemistry of DaomaniteHide
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Crystallography of DaomaniteHide
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Crystal System:
Orthorhombic
Cell Parameters:
a = 5.93 Å, b = 16.23 Å, c = 3.67 Å
Ratio:
a:b:c = 0.365 : 1 : 0.226
Unit Cell V:
353.22 ų (Calculated from Unit Cell)
Morphology:
Tabular crystals to 0.3 mm.
Twinning:
On {010}, forming “elbow twins”.
Can exhibit multiple twinning.
Comment:
Point Group: 2/m 2/m 2/m or mm2.; Space Group: Amam, Amam, or Ama21.
Crystal StructureHide
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| ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
|---|---|---|---|---|---|---|---|
| 0019982 | Daomanite | Ding K, He C, Zheng Q (1982) Determination of daomanite crystal structure Kexue Tongbao 27 62-66 | 1982 | Tao and Ma districts, Fengning County, Chengde Prefecture, Hebei Province, China | 0 | 293 | |
| 0019983 | Daomanite | Ding K, He C, Zheng Q (1982) Determination of daomanite crystal structure Kexue Tongbao 27 62-66 | 1982 | Tao and Ma districts, Fengning County, Chengde Prefecture, Hebei Province, China | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder DiffractionHide
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Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 2.93 Å | (100) |
| 3.29 Å | (60) |
| 7.95 Å | (50) |
| 1.63 Å | (50) |
| 1.006 Å | (50) |
| 0.9299 Å | (50) |
| 2.72 Å | (40) |
Geological EnvironmentHide
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Type Occurrence of DaomaniteHide
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Place of Conservation of Type Material:
National Museum for Geology, Beijing, China, number M10122 (type).
Geological Setting of Type Material:
Pyroxenite type platinum ores. Often found replacing bornite.
Associated Minerals at Type Locality:
Reference:
Yu Zuxiang, Lin Shujen, Chao Pao, Fang Chingsung, and Huang Chishun (1974) A preliminary study of some new minerals of the platinum-group and another associated new one in a platinum-bearing intrusion in a region of China. Acta Geologica Sinica: 48(2): 202-218 (in Chinese with English abstract).
Other Language Names for DaomaniteHide
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Related Minerals - Strunz-mindat GroupingHide
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Other InformationHide
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Notes:
Not attacked by HCl, HNO3, or H3PO4.
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 DaomaniteHide
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References for DaomaniteHide
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Reference List:
Fleischer, Michael, Pabst, Adolf, Mandarino, Joseph A., Chao, George Y., Cabri, Louis, J. (1976) New Mineral Names. American Mineralogist, 61 (1-2) 174-186
Localities for DaomaniteHide
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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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