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Penroseite

A valid IMA mineral species - grandfathered
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About PenroseiteHide

07436110015097472989852.jpg
Richard A. F. Penrose Jr.
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.
Dimorph of:

Unique IdentifiersHide

Mindat ID:
3151
Long-form identifier:
mindat:1:1:3151:2
GUID
(UUID V4):
68ab04b8-ef27-4f6b-846e-41cb2f9555f1

IMA Classification of PenroseiteHide

Approved, 'Grandfathered' (first described prior to 1959)
First published:
1925

Classification of PenroseiteHide

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.
2.12.1.4

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

Mineral SymbolsHide

As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

SymbolSourceReference
PenIMA–CNMNCWarr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43

Physical Properties of PenroseiteHide

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}
Fracture:
Sub-Conchoidal
Density:
6.58 - 6.74 g/cm3 (Measured)    6.7 g/cm3 (Calculated)

Optical Data of PenroseiteHide

Reflectivity:
WavelengthR
400nm40.2%
420nm40.1%
440nm40.1%
460nm40.2%
480nm40.4%
500nm40.7%
520nm41.1%
540nm41.5%
560nm41.9%
580nm42.3%
600nm42.8%
620nm43.3%
640nm43.6%
660nm44.0%
680nm44.1%
700nm44.2%

Reflectance graph
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 PenroseiteHide

Mindat Formula:
(Ni,Co,Cu)Se2

Puse NiSe2 is known as a synthetic phase (see also kullerudite).
Common Impurities:
Ag,Hg,Pb,Fe,S

Crystallography of PenroseiteHide

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 StructureHide

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0011916PenroseiteFuruseth S, Kjekshus A, Andresen A F (1969) On the magnetic properties of CoSe2, NiS2, and NiSe2 Acta Chemica Scandinavica 23 2325-23341969synthetic0293
0014017PenroseiteFoecker A J, Jeitschko W (2001) The atomic order of the pnictogen and chalcogen atoms in equiatomic ternary Journal of Solid State Chemistry 162 69-782001synthetic0293
CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
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 EnvironmentHide

Paragenetic Mode(s):
Paragenetic ModeEarliest Age (Ga)
High-𝑇 alteration and/or metamorphism
33 : Minerals deposited by hydrothermal metal-rich fluids (see also [#12])

Type Occurrence of PenroseiteHide

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 PenroseiteHide

Other Language Names for PenroseiteHide

Simplified Chinese:硒铜镍矿
Traditional Chinese:硒銅鎳礦

Varieties of PenroseiteHide

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 SpeciesHide

Member of:
Other Members of this group:
AurostibiteAuSb2Iso. m3 (2/m 3) : Pa3
CattieriteCoS2Iso. m3 (2/m 3) : Pa3
DzharkeniteFeSe2Iso. m3 (2/m 3) : Pa3
ErlichmaniteOsS2Iso. m3 (2/m 3) : Pa3
FukuchiliteCu3FeS8Iso. m3 (2/m 3) : Pa3
GaotaiiteIr3Te8Iso. m3 (2/m 3) : Pa3
GeversitePtSb2Iso. m3 (2/m 3) : Pa3
HaueriteMnS2Iso. m3 (2/m 3) : Pa3
InsizwaitePt(Bi,Sb)2Iso. m3 (2/m 3) : Pa3
Krut'aiteCuSe2Iso. m3 (2/m 3) : Pa3
LauriteRuS2Iso. m3 (2/m 3) : Pa3
PyriteFeS2Iso. m3 (2/m 3) : Pa3
SperrylitePtAs2Iso. m3 (2/m 3) : Pa3
TrogtaliteCoSe2Iso. m3 (2/m 3) : Pa3
VaesiteNiS2Iso. m3 (2/m 3) : Pa3
Villamanínite(Cu,Ni,Co,Fe)S2Tric.

Common AssociatesHide

Associated Minerals Based on Photo Data:
73 photos of Penroseite associated with ClausthalitePbSe
59 photos of Penroseite associated with Krut'aiteCuSe2
37 photos of Penroseite associated with KlockmanniteCuSe
27 photos of Penroseite associated with EldragóniteCu6BiSe4(Se2)
25 photos of Penroseite associated with WatkinsoniteCu2PbBi4(Se,S,Te)8
18 photos of Penroseite associated with QuijarroiteCu6HgPb2Bi4Se12
14 photos of Penroseite associated with Goethiteα-Fe3+O(OH)
14 photos of Penroseite associated with UmangiteCu3Se2
10 photos of Penroseite associated with PetroviciteCu3HgPbBiSe5
10 photos of Penroseite associated with GoldAu

Related Minerals - Strunz-mindat GroupingHide

2.EB.Iridarsenite(Ir,Ru)As2Mon. 2/m : P21/b
2.EB.SelenolauriteRuSe2Iso. m3 (2/m 3) : Pa3
2.EB.AndrieslombaarditeRhSbSIso. 2 3 : P21 3
2.EB.Kanatzidisite(SbBiS3)2Te2Mon. 2/m : P21/m
2.EB.05aAurostibiteAuSb2Iso. m3 (2/m 3) : Pa3
2.EB.05bBambollaiteCu(Se,Te)2Tet.
2.EB.05aCattieriteCoS2Iso. m3 (2/m 3) : Pa3
2.EB.05aErlichmaniteOsS2Iso. m3 (2/m 3) : Pa3
2.EB.05aFukuchiliteCu3FeS8Iso. m3 (2/m 3) : Pa3
2.EB.05aGeversitePtSb2Iso. m3 (2/m 3) : Pa3
2.EB.05aHaueriteMnS2Iso. m3 (2/m 3) : Pa3
2.EB.05aInsizwaitePt(Bi,Sb)2Iso. m3 (2/m 3) : Pa3
2.EB.05aKrut'aiteCuSe2Iso. m3 (2/m 3) : Pa3
2.EB.05aLauriteRuS2Iso. m3 (2/m 3) : Pa3
2.EB.05aPyriteFeS2Iso. m3 (2/m 3) : Pa3
2.EB.05aSperrylitePtAs2Iso. m3 (2/m 3) : Pa3
2.EB.05aTrogtaliteCoSe2Iso. m3 (2/m 3) : Pa3
2.EB.05aVaesiteNiS2Iso. m3 (2/m 3) : Pa3
2.EB.05aVillamanínite(Cu,Ni,Co,Fe)S2Tric.
2.EB.05aDzharkeniteFeSe2Iso. m3 (2/m 3) : Pa3
2.EB.05aGaotaiiteIr3Te8Iso. m3 (2/m 3) : Pa3
2.EB.05a vCayeuxite
2.EB.10bAlloclasiteCo1-xFexAsSMon. 2 : P21
2.EB.10dCostibiteCoSbSOrth. mm2 : Pmn21
2.EB.10aFerroseliteFeSe2Orth. mmm (2/m 2/m 2/m) : Pnnm
2.EB.10aFrohbergiteFeTe2Orth. mmm (2/m 2/m 2/m) : Pnnm
2.EB.10cGlaucodot(Co0.50Fe0.50)AsSOrth. mm2 : Pmn21
2.EB.10aKulleruditeNiSe2Orth. mmm (2/m 2/m 2/m) : Pnnm
2.EB.10aMarcasiteFeS2Orth. mmm (2/m 2/m 2/m) : Pnnm
2.EB.10aMattagamiteCoTe2Orth. mmm (2/m 2/m 2/m) : Pnnm
2.EB.10eParacostibiteCoSbSOrth. mmm (2/m 2/m 2/m) : Pbca
2.EB.10ePararammelsbergiteNiAs2Orth. mmm (2/m 2/m 2/m) : Pbca
2.EB.10fOeniteCoSbAsOrth.
2.EB.10aPetříčekiteCuSe2Orth. mmm (2/m 2/m 2/m) : Pnnm
2.EB.15aAnduoite(Ru,Os)As2Orth.
2.EB.15aClinosaffloriteCoAs2Mon. 2/m : P21/m
2.EB.15aLöllingiteFeAs2Orth. mmm (2/m 2/m 2/m) : Pnnm
2.EB.15aNisbiteNiSb2Orth. mmm (2/m 2/m 2/m) : Pnnm
2.EB.15aOmeiite(Os,Ru)As2Orth.
2.EB.15cPaxiteCuAs2Mon. 2/m : P21/b
2.EB.15aRammelsbergiteNiAs2Orth. mmm (2/m 2/m 2/m) : Pnnm
2.EB.15aSafflorite(Co,Ni,Fe)As2Orth. mmm (2/m 2/m 2/m) : Pnnm
2.EB.15bSeinäjokite(Fe,Ni)(Sb,As)2Orth.
2.EB.20ArsenopyriteFeAsSMon. 2/m : P21/b
2.EB.20GudmunditeFeSbSMon. 2/m : P21/b
2.EB.20Osarsite(Os,Ru)AsSMon.
2.EB.20Ruarsite(Ru,Os)AsSMon.
2.EB.25 vaAntimony-bearing GersdorffiteNi(As,Sb)S
2.EB.25CobaltiteCoAsSOrth. mm2 : Pca21
2.EB.25GersdorffiteNiAsSIso. m3 (2/m 3) : Pa3
2.EB.25Hollingworthite(Rh,Pt,Pd)AsSIso. m3 (2/m 3) : Pa3
2.EB.25Irarsite(Ir,Ru,Rh,Pt)AsSIso. m3 (2/m 3) : Pa3
2.EB.25JolliffeiteNiAsSeIso. m3 (2/m 3) : Pa3
2.EB.25KrutoviteNiAs2Iso. 2 3 : P21 3
2.EB.25MaslovitePtBiTeIso. 2 3 : P21 3
2.EB.25MicheneritePdBiTeIso. 2 3 : P21 3
2.EB.25PadmaitePdBiSeIso. 4 3 2
2.EB.25PlatarsitePt(As,S)2Iso. m3 (2/m 3) : Pa3
2.EB.25TestibiopalladitePdSbTeIso.
2.EB.25TolovkiteIrSbSIso.
2.EB.25UllmanniteNiSbSIso. 2 3 : P21 3
2.EB.25WillyamiteCoSbS
2.EB.25ChangchengiteIrBiSIso. 2 3 : P21 3
2.EB.25MayingiteIrBiTeIso. m3 (2/m 3) : Pa3
2.EB.25KalungaitePdAsSeIso. m3 (2/m 3) : Pa3
2.EB.25MilotaitePdSbSeIso. 2 3 : P21 3
2.EB.25ParagersdorffiteNi(As,S)2Iso. m3 (2/m 3) : Pa3
2.EB.25OrthogersdorffiteNiAsSOrth. mm2 : Pca21
2.EB.25KvačekiteNiSbSeIso. 2 3 : P21 3
2.EB.30UrvantsevitePd(Bi,Pb)2Tet. 4/mmm (4/m 2/m 2/m) : I4/mmm
2.EB.35RheniiteReS2Tric. 1 : P1

Other InformationHide

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 PenroseiteHide

References for PenroseiteHide

Localities for PenroseiteHide

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

- 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.
Bolivia
 
  • Potosí
    • Antonio Quijarro Province
      • Porco Municipality
doi:10.3390/min7050068 +3 other references
    • Chayanta Province
      • Colquechaca Municipality
        • Colquechaca
Livingstone et al. (1984)
          • Pakajake Canyon
Gordon (1926) +4 other references
Canada
 
  • Nova Scotia
    • Hants Co.
      • Walton
Boyle et al. (1966)
China
 
  • Inner Mongolia
    • Alxa League (Alashan Prefecture)
      • Alxa Right Banner (Alashan Youqi)
Jiayong Pan et al. (2009)
  • Sichuan
    • Ngawa Autonomous Prefecture (Aba Autonomous Prefecture)
      • Zoigê Co. (Ruo'ergai Co.)
Liu Jia-jun et al. (2000)
DR Congo
 
  • Haut-Katanga
    • Kambove Territory
      • Shinkolobwe
edit.africamuseum.be (n.d.) +1 other reference
Finland
 
  • North Ostrobothnia
Anthony et al. (1990) +1 other reference
Häkli et al. (1965)
France
 
  • Auvergne-Rhône-Alpes
    • Puy-de-Dôme
      • Clermont-Ferrand
        • Olloix
Queneau (n.d.)
Germany
 
  • Bavaria
    • Upper Palatinate
Seeliger et al. (1965) +1 other reference
  • Lower Saxony
    • Goslar District
      • Harz (Landkreis Goslar)
Ramdohr et al. (1955) +1 other reference
  • Rhineland-Palatinate
    • Altenkirchen
      • Kirchen (Sieg)
        • Niederfischbach
Schnorrer-Köhler (198) +2 other references
  • Saxony-Anhalt
    • Mansfeld-Südharz
      • Mansfeld
Wittern (2001)
India
 
  • Meghalaya
    • South West Khasi Hills District
Babu et al. (2002)
Babu et al. (2002)
Romania
 
  • Suceava County
    • Iacobeni
minerals-of-the-carpathians.eu (2008)
      • Tolovanu
Hîrtopanu (1997) +1 other reference
Spain
 
  • Castile and Leon
    • León
      • Cármenes
        • Villanueva de Pontedo
Simon et al. (1997)
UK
 
  • England
    • Devon
      • Torbay
        • Torquay
Stanley et al. (1990) +1 other reference
 
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