Sperrylite Mineral Data (original) (raw)

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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Click Here for Larger Sperrylite Image 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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Click Here for Larger Sperrylite Image Sperrylite Cabriite 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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Click Here for Larger Sperrylite Image Sperrylite Cabriite 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 - DiploidalH-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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| | Forms:( 1 0 2) ( 1 1 1) ( 1 0 0) Warning: this large pop-up is very compute intensive and may not work well with some computers. | | --------------------------------------------------------------------------------------------------------------------------------------------------- |

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| | Stassen W N , Heyding R D , Canadian Journal of Chemistry , 46 (1968) p.2159-2163, Crystal structures of RuSe2, OsSe2, PtAs2, and alpha-NiAs2, Locality: synthetic | | --------------------------------------------------------------------------------------------------------------------------------------------------------------------- |

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

RelativeIntensity 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
Locality:

Notes: