Penroseite
A valid IMA mineral species - grandfathered
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About Penroseite
Formula:
(Ni,Co,Cu)Se2
Puse NiSe2 is known as a synthetic phase (see also kullerudite).
Colour:
Steel-gray
Lustre:
Metallic
Hardness:
2½ - 3
Specific Gravity:
6.58 - 6.74
Crystal System:
Isometric
Member of:
Name:
Named in honor of Richard Alexander Fullerton Penrose Jr. (17 December 1863, Philadelphia, Pennsylvania, USA - 31 July 1931), American mining geologist. He worked for a period for the United States Geological Survey (including early work on Cripple Creek, Colorado), was a mining consultant, mine owner, professor at the University of Chicago, editor for the Journal of Geology, President of the Academy of Natural Sciences of Philadelphia, first President of the Society of Economic Geologists, and president of the Geological Society of America. He funded Penrose medals for those last two societies. He was inducted into the National Mining Hall of Fame in 2006.
Type Locality:
Dimorph of:
Unique Identifiers
Mindat ID:
3151
Long-form identifier:
mindat:1:1:3151:2
GUID
(UUID V4):
(UUID V4):
68ab04b8-ef27-4f6b-846e-41cb2f9555f1
IMA Classification of Penroseite
Approved, 'Grandfathered' (first described prior to 1959)
First published:
1925
Classification of Penroseite
2.EB.05a
2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
E : Metal Sulfides, M: S <= 1:2
B : M:S = 1:2, with Fe, Co, Ni, PGE, etc.
2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
E : Metal Sulfides, M: S <= 1:2
B : M:S = 1:2, with Fe, Co, Ni, PGE, etc.
2.12.1.4
2 : SULFIDES
12 : AmBnXp, with (m+n):p = 1:2
2 : SULFIDES
12 : AmBnXp, with (m+n):p = 1:2
3.11.19
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
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 Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
Symbol | Source | Reference |
---|---|---|
Pen | 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 Penroseite
Metallic
Transparency:
Opaque
Comment:
Quickly tarnishes
Colour:
Steel-gray
Streak:
Black
Hardness:
2½ - 3 on Mohs scale
Hardness:
VHN100=500 - 583 kg/mm2 - Vickers
Tenacity:
Brittle
Cleavage:
Perfect
Perfect on {001}; distinct on {011}
Perfect on {001}; distinct on {011}
Fracture:
Sub-Conchoidal
Density:
6.58 - 6.74 g/cm3 (Measured) 6.7 g/cm3 (Calculated)
Optical Data of Penroseite
Reflectivity:
Wavelength | R |
---|---|
400nm | 40.2% |
420nm | 40.1% |
440nm | 40.1% |
460nm | 40.2% |
480nm | 40.4% |
500nm | 40.7% |
520nm | 41.1% |
540nm | 41.5% |
560nm | 41.9% |
580nm | 42.3% |
600nm | 42.8% |
620nm | 43.3% |
640nm | 43.6% |
660nm | 44.0% |
680nm | 44.1% |
700nm | 44.2% |
Graph shows reflectance levels at different wavelengths (in nm). Top of box is 100%. Peak reflectance is 44.2%.
Colour in reflected light:
Creamy grayish white
Chemistry of Penroseite
Mindat Formula:
Elements listed:
Common Impurities:
Ag,Hg,Pb,Fe,S
Crystallography of Penroseite
Crystal System:
Isometric
Class (H-M):
m3 (2/m 3) - Diploidal
Space Group:
Pa3
Setting:
Pa3
Cell Parameters:
a = 5.991 Å
Unit Cell V:
215.03 ų (Calculated from Unit Cell)
Z:
4
Morphology:
Reniform masses with radiating columnar structure.
Crystal Structure
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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
---|---|---|---|---|---|---|---|
0011916 | Penroseite | Furuseth S, Kjekshus A, Andresen A F (1969) On the magnetic properties of CoSe2, NiS2, and NiSe2 Acta Chemica Scandinavica 23 2325-2334 | 1969 | synthetic | 0 | 293 | |
0014017 | Penroseite | Foecker A J, Jeitschko W (2001) The atomic order of the pnictogen and chalcogen atoms in equiatomic ternary Journal of Solid State Chemistry 162 69-78 | 2001 | synthetic | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
2.68 Å | (100) |
2.45 Å | (100) |
1.806 Å | (90) |
1.599 Å | (40) |
3.02 Å | (30) |
1.662 Å | (30) |
1.151 Å | (30) |
Comments:
Colquechaca, Bolivia.
Geological Environment
Paragenetic Mode(s):
Paragenetic Mode | Earliest Age (Ga) |
---|---|
High-𝑇 alteration and/or metamorphism | |
33 : Minerals deposited by hydrothermal metal-rich fluids (see also [#12]) |
Type Occurrence of Penroseite
General Appearance of Type Material:
A mass of lead-gray, radiating, columnar crystals.
Place of Conservation of Type Material:
The Natural History Museum, London, England, 1926,1; Harvard University, Cambridge, Massachusetts, 87472; National Museum of Natural History, Washington, D.C., USA, 95302, R7247.
Geological Setting of Type Material:
Hydrothermal veins.
Associated Minerals at Type Locality:
Synonyms of Penroseite
Other Language Names for Penroseite
Varieties of Penroseite
Cobalt-bearing Penroseite | |
Unnamed (Cubic NiSe2) | The phase was identified by Franz and Wetzenstein ("Natuerliches kubisches NiSe2 von Caracoles, Bolivien," Naturwissenschaften, 72, 655-656.) by the similarity of its PXRD pattern to that of JCPDS 11-552. The authors state it is optically indistinguishabl... |
Relationship of Penroseite to other Species
Member of:
Other Members of this group:
Aurostibite | AuSb2 | Iso. m3 (2/m 3) : Pa3 |
Cattierite | CoS2 | Iso. m3 (2/m 3) : Pa3 |
Dzharkenite | FeSe2 | Iso. m3 (2/m 3) : Pa3 |
Erlichmanite | OsS2 | Iso. m3 (2/m 3) : Pa3 |
Fukuchilite | Cu3FeS8 | Iso. m3 (2/m 3) : Pa3 |
Gaotaiite | Ir3Te8 | Iso. m3 (2/m 3) : Pa3 |
Geversite | PtSb2 | Iso. m3 (2/m 3) : Pa3 |
Hauerite | MnS2 | Iso. m3 (2/m 3) : Pa3 |
Insizwaite | Pt(Bi,Sb)2 | Iso. m3 (2/m 3) : Pa3 |
Krut'aite | CuSe2 | Iso. m3 (2/m 3) : Pa3 |
Laurite | RuS2 | Iso. m3 (2/m 3) : Pa3 |
Pyrite | FeS2 | Iso. m3 (2/m 3) : Pa3 |
Sperrylite | PtAs2 | Iso. m3 (2/m 3) : Pa3 |
Trogtalite | CoSe2 | Iso. m3 (2/m 3) : Pa3 |
Vaesite | NiS2 | Iso. m3 (2/m 3) : Pa3 |
Villamanínite | (Cu,Ni,Co,Fe)S2 | Tric. |
Common Associates
Associated Minerals Based on Photo Data:
73 photos of Penroseite associated with Clausthalite | PbSe |
59 photos of Penroseite associated with Krut'aite | CuSe2 |
37 photos of Penroseite associated with Klockmannite | CuSe |
27 photos of Penroseite associated with Eldragónite | Cu6BiSe4(Se2) |
25 photos of Penroseite associated with Watkinsonite | Cu2PbBi4(Se,S,Te)8 |
18 photos of Penroseite associated with Quijarroite | Cu6HgPb2Bi4Se12 |
14 photos of Penroseite associated with Goethite | α-Fe3+O(OH) |
14 photos of Penroseite associated with Umangite | Cu3Se2 |
10 photos of Penroseite associated with Petrovicite | Cu3HgPbBiSe5 |
10 photos of Penroseite associated with Gold | Au |
Related Minerals - Strunz-mindat Grouping
2.EB. | Iridarsenite | (Ir,Ru)As2 |
2.EB. | Selenolaurite | RuSe2 |
2.EB. | Andrieslombaardite | RhSbS |
2.EB. | Kanatzidisite | (SbBiS3)2Te2 |
2.EB.05a | Aurostibite | AuSb2 |
2.EB.05b | Bambollaite | Cu(Se,Te)2 |
2.EB.05a | Cattierite | CoS2 |
2.EB.05a | Erlichmanite | OsS2 |
2.EB.05a | Fukuchilite | Cu3FeS8 |
2.EB.05a | Geversite | PtSb2 |
2.EB.05a | Hauerite | MnS2 |
2.EB.05a | Insizwaite | Pt(Bi,Sb)2 |
2.EB.05a | Krut'aite | CuSe2 |
2.EB.05a | Laurite | RuS2 |
2.EB.05a | Pyrite | FeS2 |
2.EB.05a | Sperrylite | PtAs2 |
2.EB.05a | Trogtalite | CoSe2 |
2.EB.05a | Vaesite | NiS2 |
2.EB.05a | Villamanínite | (Cu,Ni,Co,Fe)S2 |
2.EB.05a | Dzharkenite | FeSe2 |
2.EB.05a | Gaotaiite | Ir3Te8 |
2.EB.05a v | Cayeuxite | |
2.EB.10b | Alloclasite | Co1-xFexAsS |
2.EB.10d | Costibite | CoSbS |
2.EB.10a | Ferroselite | FeSe2 |
2.EB.10a | Frohbergite | FeTe2 |
2.EB.10c | Glaucodot | (Co0.50Fe0.50)AsS |
2.EB.10a | Kullerudite | NiSe2 |
2.EB.10a | Marcasite | FeS2 |
2.EB.10a | Mattagamite | CoTe2 |
2.EB.10e | Paracostibite | CoSbS |
2.EB.10e | Pararammelsbergite | NiAs2 |
2.EB.10f | Oenite | CoSbAs |
2.EB.10a | Petříčekite | CuSe2 |
2.EB.15a | Anduoite | (Ru,Os)As2 |
2.EB.15a | Clinosafflorite | CoAs2 |
2.EB.15a | Löllingite | FeAs2 |
2.EB.15a | Nisbite | NiSb2 |
2.EB.15a | Omeiite | (Os,Ru)As2 |
2.EB.15c | Paxite | CuAs2 |
2.EB.15a | Rammelsbergite | NiAs2 |
2.EB.15a | Safflorite | (Co,Ni,Fe)As2 |
2.EB.15b | Seinäjokite | (Fe,Ni)(Sb,As)2 |
2.EB.20 | Arsenopyrite | FeAsS |
2.EB.20 | Gudmundite | FeSbS |
2.EB.20 | Osarsite | (Os,Ru)AsS |
2.EB.20 | Ruarsite | (Ru,Os)AsS |
2.EB.25 va | Antimony-bearing Gersdorffite | Ni(As,Sb)S |
2.EB.25 | Cobaltite | CoAsS |
2.EB.25 | Gersdorffite | NiAsS |
2.EB.25 | Hollingworthite | (Rh,Pt,Pd)AsS |
2.EB.25 | Irarsite | (Ir,Ru,Rh,Pt)AsS |
2.EB.25 | Jolliffeite | NiAsSe |
2.EB.25 | Krutovite | NiAs2 |
2.EB.25 | Maslovite | PtBiTe |
2.EB.25 | Michenerite | PdBiTe |
2.EB.25 | Padmaite | PdBiSe |
2.EB.25 | Platarsite | Pt(As,S)2 |
2.EB.25 | Testibiopalladite | PdSbTe |
2.EB.25 | Tolovkite | IrSbS |
2.EB.25 | Ullmannite | NiSbS |
2.EB.25 | Willyamite | CoSbS |
2.EB.25 | Changchengite | IrBiS |
2.EB.25 | Mayingite | IrBiTe |
2.EB.25 | Kalungaite | PdAsSe |
2.EB.25 | Milotaite | PdSbSe |
2.EB.25 | Paragersdorffite | Ni(As,S)2 |
2.EB.25 | Orthogersdorffite | NiAsS |
2.EB.25 | Kvačekite | NiSbSe |
2.EB.30 | Urvantsevite | Pd(Bi,Pb)2 |
2.EB.35 | Rheniite | ReS2 |
Other Information
Thermal Behaviour:
Easily fusible, coloring the flame azure blue. It gives off reddish-brown smoke, with an occasional white wisp at the border of the smoke column. The characteristic disagreeable "horse radish" odor of Se is obvious. Similar behavior even with a candle flame. Before the blowpipe, the mineral decrepitates. In a closed tube penroseite decomposes, and a coating of selenium is deposited on the wall of the tube; lower down the coat is black and consists of globules of selenium; higher up, the coat consists of translucent, acicular, red crystals.
Notes:
Readily dissolves in HNO3 with effervescence. Adding excess NH4OH to the solution turns it a methyl blue (Cu and Ni). Dimethylglyoxime yields a scarlet precipitate (Ni).
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 Penroseite
mindat.org URL:
https://www.mindat.org/min-3151.html
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References for Penroseite
Reference List:
Localities for Penroseite
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.
Bolivia | |
| doi:10.3390/min7050068 +3 other references |
| Livingstone et al. (1984) |
| Gordon (1926) +4 other references |
Canada | |
| Boyle et al. (1966) |
China | |
| Jiayong Pan et al. (2009) |
| Liu Jia-jun et al. (2000) |
DR Congo | |
| edit.africamuseum.be (n.d.) +1 other reference |
Finland | |
| Anthony et al. (1990) +1 other reference |
Häkli et al. (1965) | |
France | |
| Queneau (n.d.) |
Germany | |
| Seeliger et al. (1965) +1 other reference |
| Ramdohr et al. (1955) +1 other reference |
| Schnorrer-Köhler (198) +2 other references |
| Wittern (2001) |
India | |
| Babu et al. (2002) |
Babu et al. (2002) | |
Romania | |
| minerals-of-the-carpathians.eu (2008) |
| Hîrtopanu (1997) +1 other reference |
Spain | |
| Simon et al. (1997) |
UK | |
| Stanley et al. (1990) +1 other reference |
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Virgen de Surumi mine, Pakajake Canyon, Colquechaca, Colquechaca Municipality, Chayanta Province, Potosí, Bolivia