Mineralogy Database

Penroseite Mineral Data

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General Penroseite Information

Help on Chemical  Formula: Chemical Formula: (Ni,Co,Cu)Se2
Help on Composition: Composition: Molecular Weight = 217.17 gm
   Cobalt     8.14 %  Co
   Copper     2.93 %  Cu
   Nickel    16.22 %  Ni
   Selenium  72.72 %  Se
            ______ 
            100.00 % 
Help on Empirical Formula: Empirical Formula: Ni0.6Co0.3Cu0.1Se2
Help on Environment: Environment: In hydrothermal veins.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1926
Help on Locality: Locality: Pacajake mine, Hiaco, 30 km east-northeast of Colquechaca, Potos�, Bolivia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Richard Alexander Fullerton Penrose, Jr. (1863-1931), American economic geologist, of Philaelphia, Pennsylvania, USA.
Help on Name Pronunciation: Name Pronunciation: Penroseite + Pronunciation Say PENROSEITE
Help on Synonym: Synonym: Blockite
  ICSD 40330
  PDF 41-1495
 

Penroseite Image

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  Penroseite

Comments: Silvery metallic penroseite masses in matrix.
Location: Unnamed prospect in Pacajake Canyon, near Culquechaca, Potosi, Bolivia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

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  Kitkaite   Penroseite   Sederholmite

Comments: B&W polished section image showing kitkaite replacing calcite in penroseite, clausthalite and sederholmite. Note the absence of the clausthalite envelope around kitkaite..
Location: Valley of the Kitka river in Kuusamo, northeast Finland. (AmMin, v50:581). Scale: 100 X.
© American Mineralogist

Penroseite Crystallography

Help on Cell Dimensions: Cell Dimensions: a = 5.991, Z = 4; V = 215.03 Den(Calc)= 6.71
Help on Crystal System: Crystal System: Isometric - Diploidal H-M Symbol (2/m 3) Space Group: P a3
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.45(1), 2.68(1), 1.806(0.9),
 

Physical Properties of Penroseite

Help on Cleavage: Cleavage: {001} Perfect, {011} Distinct
Help on Color: Color: Lead gray, Steel gray.
Help on Density: Density: 6.58 - 6.74, Average = 6.66
Help on Diaphaneity: Diaphaneity: Opaque
Help on Fracture: Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals.
Help on Habit: Habit: Columnar - Forms columns
Help on Habit: Habit: Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite)
Help on Habit: Habit: Reniform - "Kidney like" in shape (e.g.. hematite).
Help on Hardness: Hardness: 2.5-3 - Finger Nail-Calcite
Help on Luster: Luster: Metallic
Help on Streak: Streak: black
 

Optical Properties of Penroseite

Help on RL Color: RL Color: Creamy grayish white.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Penroseite in Air
λ R  ∑ R(λ) 
 400 nm   39.00   
 420 nm   39.20 
 440 nm   39.40 
 460 nm   39.60 
 480 nm   40.00 
 500 nm   40.30 
 520 nm   40.70 
 540 nm   41.10 
 560 nm   41.50 
 580 nm   42.00 
 600 nm   42.50 
 620 nm   43.00 
 640 nm   43.30 
 660 nm   43.40 
 680 nm   43.70 
 700 nm   44.20 
Calculated Relative Intensity Colors of Penroseite in Air
Relative
Intensity
   0%   30%   60%   90% 100% 120% 150% 180% 210% 230%
R                    
 

Calculated Properties of Penroseite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=5.92 gm/cc
note: Specific Gravity of Penroseite =6.71 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.05
Boson Index = 0.95
Help on Photoelectric: Photoelectric: PEPenroseite = 69.37 barns/electron
U=PEPenroseite x rElectron Density= 410.66 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Penroseite is Not Radioactive
 

Penroseite Classification

Help on  Dana Class: Dana Class: 02.12.01.04 (02)Sulfides - Including Selenides and Tellurides
  (02.12)where Am Bn Xp, with (m+n):p=1:2
  (02.12.01)Pyrite Group (Isometric: Pa3)
 
02.12.01.01 Pyrite FeS2 P a3 2/m 3
 
02.12.01.02 Vaesite NiS2 P a3 2/m 3
 
02.12.01.03 Cattierite CoS2 P a3 2/m 3
 
02.12.01.04 Penroseite (Ni,Co,Cu)Se2 P a3 2/m 3
 
02.12.01.05 Trogtalite CoSe2 P a3 2/m 3
 
02.12.01.06 Villamaninite (Cu,Ni,Co,Fe)S2 P a3 2/m 3
 
02.12.01.07 Fukuchilite Cu3FeS8 P a3 2/m 3
 
02.12.01.08 Krutaite CuSe2 P a3 2/m 3
 
02.12.01.09 Hauerite MnS2 P a3 2/m 3
 
02.12.01.10 Laurite RuS2 P a3 2/m 3
 
02.12.01.11 Aurostibite AuSb2 P a3 2/m 3
 
02.12.01.12 Krutovite NiAs2 P a3 2/m 3
 
02.12.01.13 Sperrylite PtAs2 P a3 2/m 3
 
02.12.01.14 Geversite Pt(Sb,Bi)2 P a3 2/m 3
 
02.12.01.15 Insizwaite Pt(Bi,Sb)2 P a3 2/m 3
 
02.12.01.16 Erlichmanite OsS2 P a3 2/m 3
 
02.12.01.17 Dzharkenite FeSe2 P a3 2/m 3
 
02.12.01.18 Gaotaiite Ir3Te8 P a3 2/m 3
 
02.12.01.19 Mayingite IrBiTe P a3 2/m 3
Help on  Strunz Class: Strunz Class: 02.EB.05a 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf
  02.E - Metal Sulfides, M:S � 1:2
  02.EB -M:S = 1:2, with Fe, Co, Ni, PGE, etc.
 
02.EB.05a Aurostibite AuSb2 P a3 2/m 3
 
02.EB.05a Cattierite CoS2 P a3 2/m 3
 
02.EB.05a Hauerite MnS2 P a3 2/m 3
 
02.EB.05a Fukuchilite Cu3FeS8 P a3 2/m 3
 
02.EB.05a Dzharkenite FeSe2 P a3 2/m 3
 
02.EB.05a Erlichmanite OsS2 P a3 2/m 3
 
02.EB.05a Geversite Pt(Sb,Bi)2 P a3 2/m 3
 
02.EB.05a Gaotaiite Ir3Te8 P a3 2/m 3
 
02.EB.05a Insizwaite Pt(Bi,Sb)2 P a3 2/m 3
 
02.EB.05a Laurite RuS2 P a3 2/m 3
 
02.EB.05a Krutaite CuSe2 P a3 2/m 3
 
02.EB.05a Pyrite FeS2 P a3 2/m 3
 
02.EB.05a Penroseite (Ni,Co,Cu)Se2 P a3 2/m 3
 
02.EB.05a Sperrylite PtAs2 P a3 2/m 3
 
02.EB.05a Vaesite NiS2 P a3 2/m 3
 
02.EB.05a Villamaninite (Cu,Ni,Co,Fe)S2 P a3 2/m 3
 
02.EB.05a Trogtalite CoSe2 P a3 2/m 3
 

Other Penroseite Information

Help on References: References: NAME( AntBidBlaNic1) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1)
Help on See Also: See Also: Links to other databases for Penroseite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info
15 - WWW-MINCRYST

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Print or Cut-and-Paste your Penroseite Specimen Label here :

Penroseite

(Ni,Co,Cu)Se2
Dana No: 02.12.01.04 Strunz No: 02.EB.05a
Locality:

 

Notes:

 

 
   
 


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