Mineralogy Database

Sperrylite Mineral Data

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General Sperrylite Information

Help on Chemical  Formula: Chemical Formula: PtAs2
Help on Composition: Composition: Molecular Weight = 344.92 gm
   Arsenic   43.44 %  As
   Platinum  56.56 %  Pt
            ______ 
            100.00 % 
Help on Empirical Formula: Empirical Formula: PtAs2
Help on Environment: Environment: Magmatic, in basic pegmatites, and alluvial deposits.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1889
Help on Locality: Locality: Sudbury, Ontario, Canada. Tweefontein, Republic of South Africa. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after its discoverer, the American chemist, Francis L. Sperry of Tallmadge, Ohio, USA..
Help on Name Pronunciation: Name Pronunciation: Sperrylite + Pronunciation Say SPERRYLITE
Help on Synonym: Synonym: ICSD 38428
  PDF 42-1341
 

Sperrylite Image

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  Sperrylite

Comments: Tin-white grain of sperrylite in chalcopyrite matrix.
Location: Vermillion mine, Sudbury, Ontario, Canada. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

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  Sperrylite

Comments: Brilliant, mirror-like modified octahedral crystals of sperrylite to 1.3 cm on chalcopyrite matrix..
Location: Talnak deposit, near Noril'sk, Russia. Scale: 4.4 x 2.3 x 2cm.
© Tom Loomis / Dakota Matrix

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  Cabriite   Sperrylite

Comments: Small crystal of dull gray cabriite on a larger tin-white sperrylite crystal.
Location: Dzhezhazgan, Kazakhstan. Scale: Crystal size 1.5 mm.
© John Veevaert

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  Cabriite   Sperrylite

Comments: Polished section (PPL) image of a ovoid grain of cabriite (Ca) rimmed by native silver (Ag) in a matrix of brownish cubanite (Cu), with tawny chalcopyrite (Cp). Surrounded on three sides by coarse, millimetric crystals of sperrylite (Sp).
Location: Noril’sk-Talnakh mining district of northwestern Russia. (CanMin, v40:473). Scale: Feld of view 1.2 mm.
© Canadian Mineralogist

Sperrylite Crystallography

Help on Cell Dimensions: Cell Dimensions: a = 5.967, Z = 4; V = 212.46 Den(Calc)= 10.78
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): 1.801(1), 1.148(0.7), 2.98(0.6),
Help on Forms: Forms:

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Help on Above

Forms: ( 1 0 2) ( 1 1 1) ( 1 0 0)

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Physical Properties of Sperrylite

Help on Cleavage: Cleavage: {001} Indistinct
Help on Color: Color: Tin white.
Help on Density: Density: 10.58
Help on Diaphaneity: Diaphaneity: Opaque
Help on Fracture: Fracture: Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz).
Help on Habit: Habit: Crystalline - Fine - Occurs as well-formed fine sized crystals.
Help on Habit: Habit: Disseminated - Occurs in small, distinct particles dispersed in matrix.
Help on Hardness: Hardness: 6-7 - Orthoclase-Quartz
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Metallic
Help on Magnetism: Magnetism: Nonmagnetic
Help on Streak: Streak: black
 

Optical Properties of Sperrylite

Help on RL Pleochroism: RL Pleochroism: None.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Sperrylite in Air
λ R  ∑ R(λ) 
 400 nm   59.40   
 420 nm   58.20 
 440 nm   57.00 
 460 nm   56.20 
 480 nm   55.70 
 500 nm   55.40 
 520 nm   55.20 
 540 nm   55.20 
 560 nm   55.20 
 580 nm   55.20 
 600 nm   54.90 
 620 nm   54.40 
 640 nm   53.70 
 660 nm   53.20 
 680 nm   53.00 
 700 nm   53.40 
Calculated Relative Intensity Colors of Sperrylite in Air
Relative
Intensity
   0%   20%   40%   60%   80% 100% 120% 140% 160% 170%
R                    
 

Calculated Properties of Sperrylite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=9.00 gm/cc
note: Specific Gravity of Sperrylite =10.8 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.19
Boson Index = 0.81
Help on Photoelectric: Photoelectric: PESperrylite = 910.99 barns/electron
U=PESperrylite x rElectron Density=8,199.75 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Sperrylite is Not Radioactive
 

Sperrylite Classification

Help on  Dana Class: Dana Class: 02.12.01.13 (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 Sperrylite Information

Help on References: References: NAME( Mason68) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1)
Help on See Also: See Also: Links to other databases for Sperrylite :
1 - Am. Min. Crystal Structure Database
2 - Amethyst Galleries' Mineral Gallery
3 - Athena
4 - EUROmin Project
5 - Ecole des Mines de Paris
6 - GeoScienceWorld
7 - Google Images
8 - Google Scholar
9 - Handbook of Mineralogy (MinSocAm)
10 - Handbook of Mineralogy (UofA)
11 - HyperPhysics
12 - MinDAT
13 - Mineralienatlas (Deutsch)
14 - Online Mineral Museum
15 - QUT Mineral Atlas
16 - Ruff.Info
17 - WWW-MINCRYST

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

Sperrylite

PtAs2
Dana No: 02.12.01.13 Strunz No: 02.EB.05a
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