Orcelite (original) (raw)
A valid IMA mineral species
About OrceliteHide
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Formula:
Ni5-xAs2, x ~ 0.25
Specific Gravity:
6.5 - 7.25
Name:
Named in 1959 by S. J. Caillère, J. Avias, and J. Falgueirettes in honour of Professor Jean Orcel (1896–1978), French mineralogist, curator of Muséum National d'Histoire Naturelle, Paris, France.
This page provides mineralogical data about Orcelite.
Unique IdentifiersHide
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Long-form identifier:
mindat:1:1:3012:6
eede2b8e-9944-47fb-bc13-808f556204af
IMA Classification of OrceliteHide
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IMA Formula:
Ni5-xAs2 (x = 0.25)
Type description reference:
Classification of OrceliteHide
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2.AB.10
2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
A : Alloys
B : Ni-metalloid alloys
2.3.2.1
2 : SULFIDES
3 : AmBnXp, with (m+n):p = 5:2
3.11.25
3 : Sulphides, Selenides, Tellurides, Arsenides and Bismuthides (except the arsenides, antimonides and bismuthides of Cu, Ag and Au, which are included in Section 1)
11 : Sulphides etc. of Ni
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.
Please only use the official IMA–CNMNC symbol. Older variants are listed for historical use only.
| Symbol | Source | Reference |
|---|---|---|
| Orc | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
| Orc | The Canadian Mineralogist (2019) | The Canadian Mineralogist (2019) The Canadian Mineralogist list of symbols for rock- and ore-forming minerals (December 30, 2019). download |
Physical Properties of OrceliteHide
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Comment:
"browner than nickeline"
Density:
6.5 - 7.25 g/cm3 (Measured) 8.44 g/cm3 (Calculated)
Optical Data of OrceliteHide
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Chemistry of OrceliteHide
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Mindat Formula:
Ni5-xAs2, x ~ 0.25
Common Impurities:
Fe,S,Si,Mg,H2O
Crystallography of OrceliteHide
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Class (H-M):
6_m_ m - Dihexagonal Pyramidal
Cell Parameters:
a = 6.7922(2) Å, c = 12.4975(5) Å
Morphology:
Inclusions in pentlandite
Crystal StructureHide
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| ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
|---|---|---|---|---|---|---|---|
| 0014135 | Orcelite | El-Boragy M, Bhan S, Schubert K (1970) Die kristallstruktur von Pd5Sb2 und Ni5As2 und einigen varianten Journal of the Less-Common Metals 22 445-458 | 1970 | synthetic | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder DiffractionHide
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Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 3.25 Å | (20) |
| 3.09 Å | (20) |
| 2.945 Å | (40) |
| 2.706 Å | (40) |
| 2.257 Å | (10) |
| 2.137 Å | (60) |
| 1.987 Å | (100) |
| 1.933 Å | (100) |
| 1.831 Å | (10) |
| 1.757 Å | (60) |
| 1.641 Å | (20) |
| 1.385 Å | (20) |
| 1.302 Å | (20) |
Comments:
ICDD 35-493; obsolete cards ICDD 10-219, ICDD 13-333
Geological EnvironmentHide
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Type Occurrence of OrceliteHide
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General Appearance of Type Material:
As inclusions in pentlandite and as rims on maucherite.
Geological Setting of Type Material:
In serpentinized harzburgite.
Associated Minerals at Type Locality:
Reference:
Caillère, S., Avias, J., Falgueirettes, J. (1959) Découverte en Nouvelle-Calédonie d'une minéralisation arsenicale sous forme d'un nouvel arséniure de nickel Ni2As. Comptes Rendus Hebdomadaires des Séances de l'Académie des Sciences: 249: 1771-1773.
Other Language Names for OrceliteHide
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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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Fluorescence of OrceliteHide
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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 OrceliteHide
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References for OrceliteHide
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Reference List:
Localities for OrceliteHide
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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.