UM1991-19-Se:AsCo
Valid as an unnamed mineral
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Formula:
(Co,Ni)AsSe
Colour:
White
Lustre:
Metallic
Hardness:
3 - 3½
Specific Gravity:
7.1 (Calculated)
Crystal System:
Isometric
Member of:
Co-described with jolliffeite. Found as small, discrete, anhedral grains, with clausthalite and some unidentified selenides of Bi and Pb-Bi-Ag, within 'pitchblende'.
Optically quite similar to jolliffeite. Could represent a Se analogue of either cobaltite or glaucodot.
Optically quite similar to jolliffeite. Could represent a Se analogue of either cobaltite or glaucodot.
Unique Identifiers
Mindat ID:
52065
Long-form identifier:
mindat:1:1:52065:2
GUID
(UUID V4):
(UUID V4):
d8e4b35e-85ac-41ba-b305-e906ba93a731
Classification of UM1991-19-Se:AsCo
IMA status notes:
Unnamed (probably valid)
First published:
1991
Physical Properties of UM1991-19-Se:AsCo
Metallic
Transparency:
Opaque
Colour:
White
Hardness:
3 - 3½ on Mohs scale
Hardness Data:
Estimated
Tenacity:
Brittle
Cleavage:
None Observed
Fracture:
Sub-Conchoidal
Density:
7.1 g/cm3 (Calculated)
Optical Data of UM1991-19-Se:AsCo
Anisotropism:
slightly more anisotropic than jolliffeite
Chemical Properties of UM1991-19-Se:AsCo
Formula:
(Co,Ni)AsSe
Elements listed:
Crystallography of UM1991-19-Se:AsCo
Crystal System:
Isometric
Class (H-M):
m3 (2/m 3) - Diploidal
Space Group:
Pm3
Cell Parameters:
a = 5.831 Å
Unit Cell V:
198.26 ų (Calculated from Unit Cell)
Z:
4
Morphology:
Crystals rare or unknown
Comment:
probably not orthorhombic
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
2.916 Å | (50) |
2.602 Å | (100) |
2.378 Å | (80) |
2.062 Å | (30) |
1.757 Å | (80) |
1.617 Å | (40) |
1.559 Å | (50) |
Comments:
the pattern couldn't be indexed; it differs from that of synthetic CoAsSe
Synonyms of UM1991-19-Se:AsCo
Relationship of UM1991-19-Se:AsCo to other Species
Member of:
Other Members of this group:
Andrieslombaardite | RhSbS | Iso. 2 3 : P21 3 |
Changchengite | IrBiS | Iso. 2 3 : P21 3 |
Cobaltite | CoAsS | Orth. mm2 : Pca21 |
Gersdorffite | NiAsS | Iso. m3 (2/m 3) : Pa3 |
Hollingworthite | (Rh,Pt,Pd)AsS | Iso. m3 (2/m 3) : Pa3 |
Irarsite | (Ir,Ru,Rh,Pt)AsS | Iso. m3 (2/m 3) : Pa3 |
Jolliffeite | NiAsSe | Iso. m3 (2/m 3) : Pa3 |
Kalungaite | PdAsSe | Iso. m3 (2/m 3) : Pa3 |
Maslovite | PtBiTe | Iso. 2 3 : P21 3 |
Mayingite | IrBiTe | Iso. m3 (2/m 3) : Pa3 |
Michenerite | PdBiTe | Iso. 2 3 : P21 3 |
Milotaite | PdSbSe | Iso. 2 3 : P21 3 |
Padmaite | PdBiSe | Iso. 4 3 2 |
Platarsite | PtAsS | Iso. m3 (2/m 3) : Pa3 |
Testibiopalladite | PdTe(Sb,Te) | Iso. |
Tolovkite | IrSbS | Iso. |
Ullmannite | NiSbS | Iso. 2 3 : P21 3 |
Willyamite | CoSbS |
Fluorescence of UM1991-19-Se:AsCo
Not fluorescent in UV
Other Information
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
References for UM1991-19-Se:AsCo
Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Cabri, L.J., Laflamme, J.H.G., Roberts, A.C., Criddle, A.J., Hulbert, L.J. (1991): Jolliffeite and unnamed CoAsSe; two new arsenoselenides from the north shore of Lake Athabasca, Saskatchewan. Can. Min.: 29: 411-418.
Vinogradova, R. A.; Uljanov, A. A.; Korotaeva, N. N.; Obraztsov, V. V.; Azizi, S. M. R.; Maasha, L. (1994): Selenium-bearing sulfarsenides of the cobaltite-gersdorffite series from deposits of Bu-Azzer district (Morocco). Zapiski Vserossiiskogo Mineralogicheskogo Obshchestva 123, 64-68 (in Russian).
Smith, D.G.W., Nickel, E.H. (2007): A System of Codification for Unnamed Minerals: Report of the SubCommittee for Unnamed Minerals of the IMA Commission on New Minerals, Nomenclature and Classification. Canadian Mineralogist: 45: 983-1055; http://nrmima.nrm.se (2016)
Internet Links for UM1991-19-Se:AsCo
mindat.org URL:
https://www.mindat.org/min-52065.html
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Please feel free to link to this page.
Mineral Dealers:
Localities for UM1991-19-Se:AsCo
Locality List
- 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.
All localities listed without proper references should be considered as questionable.
Canada | |
| Cabri, L.J., Laflamme, J.H.G., Roberts, A.C., Criddle, A.J., Hulbert, L.J. (1991) Jolliffeite and unnamed CoAsSe: two new arsenoselenides from the north shore of Lake Athabasca, Saskatchewan. Canadian Mineralogist: 29: 411-418. |
Morocco | |
| Vinogradova, R. A.; Uljanov, A. A.; Korotaeva, N. N.; Obraztsov, V. V.; Azizi, S. M. R.; Maasha, L. (1994): Selenium-bearing sulfarsenides of the cobaltite-gersdorffite series from deposits of Bu-Azzer district (Morocco). Zapiski Vserossiiskogo Mineralogicheskogo Obshchestva 123, 64-68 (in Russian). |