Mineraller ve özellikleri Pirit General Pyrite Information Chemical Formula: FeS2 Composition: Molecular Weight = 119.98 gm Iron 46.55 % Fe Sulfur 53.45 % S ______ 100.00 % Empirical Formula: Fe 2+ S2 Environment: Sedimentary, magmatic, metamorphic, and hydrothermal deposits. IMA Status: Valid Species (Pre-IMA) Locality: Common world wide. Link to MinDat.org Location Data. Name Origin: From the Greek, pyrites lithos, "stone which strikes fire," in allusion to the sparking produced when iron is struck by a lump of pyrite. Synonym: Bravoite-Ni Cobaltian Pyrite Fool's Gold ICSD 316 PDF 42-1340 Pyrite Crystallography Cell Dimensions: a = 5.417, Z = 4; V = 158.96 Den(Calc)= 5.01 Crystal System: Isometric - DiploidalH-M Symbol (2/m 3) Space Group: P a3 X Ray Diffraction: By Intensity(I/I o): 1.6332(1), 2.709(0.85), 2.423(0.65), Forms: Mouse Dbl Clk - Start-Stop Rotation RMB - Cycle Display Modes Drag1 - Manipulate Crystal Drag2 - Resize Keyboard S - Stereo I - Indicies - Start-Stop Rotation F - Fit to Screen M - Menu Help on Above Forms: [ 1 0 0] [ 1 0 2] Warning: this large pop-up is very compute intensive and may not work well with some computers. Physical Properties of Pyrite Cleavage: [100] Poor, [110] Poor Color: Pale brass yellow. Density: 5 - 5.02, Average = 5.01 Diaphaniety: Opaque Fracture: Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz). Habits: Striated - Parallel lines on crystal surface or cleavage face., Druse - Crystal growth in a cavity which results in numerous crystal tipped surfaces., Stalactitic - Shaped like pendan t columns as stalactites or stalagmites Hardness: 6.5 - Pyrite Luminescence: None. Luster: Metallic Magnetism: Magnetic after heating Streak: greenish black Optical Properties of Pyrite RL Color: Creamy white. Reflectivity Standardized Intensity (100%) Reflection Spectra of Pyrite in Air ? R ? R (? ) 400 nm 38.20 420 nm 40.50 440 nm 42.80 460 nm 45.50 480 nm 48.50 500 nm 51.00 520 nm 53.60 540 nm 53.80 560 nm 54.60 580 nm 55.00 600 nm 55.20 620 nm 55.50 640 nm 56.00 660 nm 56.40 680 nm 56.80 700 nm 57.00 Calculated Relative Intensity Colors of Pyrite in Air Relative Intensity 0% 30% 60% 90% 100% 120% 150% 180% 200% R Pyrite Classification Dana Class: 2.12.1.1 (2)Sulfides - Including Selenides and Tellurides (2.12)where Am Bn Xp, with (m+n):p=1:2 (2.12.1)Pyrite Group (Isometric: Pa3) 2.12.1.1 Pyrite FeS2 P a3 2/m 3 2.12.1.2 Vaesite NiS2 P a3 2/m 3 2.12.1.3 Cattierite CoS2 P a3 2/m 3 2.12.1.4 Penroseite (Ni,Co,Cu)Se2 P a3 2/m 3 2.12.1.5 Trogtalite CoSe2 P a3 2/m 3 2.12.1.6 Villamaninite (Cu,Ni,Co,Fe)S2 P a3 2/m 3 2.12.1.7 Fukuchilite Cu3FeS8 P a3 2/m 3 2.12.1.8 Krutaite CuSe2 P a3 2/m 3 2.12.1.9 Hauerite MnS2 P a3 2/m 3 2.12.1.10 Laurite RuS2 P a3 2/m 3 2.12.1.11 Aurostibite AuSb2 P a3 2/m 3 2.12.1.12 Krutovite NiAs2 P a3 2/m 3 2.12.1.13 Sperrylite PtAs2 P a3 2/m 3 2.12.1.14 Geversite Pt(Sb,Bi)2 P a3 2/m 3 2.12.1.15 Insizwaite Pt(Bi,Sb)2 P a3 2/m 3 2.12.1.16 Erlichmanite OsS2 P a3 2/m 3 2.12.1.17 Dzharkenite FeSe2 P a3 2/m 3 2.12.1.18 Gaotaiite Ir3Te8 P a3 2/m 3 2.12.1.19 Mayingite IrBiTe P a3 2/m 3 Strunz Class: II/D.17-30 II - Sulfides and sulphosalts II/D - Sulfides with metal: sulfur, selenium and tellurium < 1:1, Tellurides with Copper, Silver, Gold II/D.17 - Pyrite group and related compounds, Fukuchilite - Micherenite II/D.17-10 Fukuchilite Cu3FeS8 P a3 2/m 3 II/D.17-20 Villamaninite (Cu,Ni,Co,Fe)S2 P a3 2/m 3 II/D.17-30 Pyrite FeS2 P a3 2/m 3 II/D.17-40 Cattierite CoS2 P a3 2/m 3 II/D.17-50 Vaesite NiS2 P a3 2/m 3 II/D.17-60 Hauerite MnS2 P a3 2/m 3 II/D.17-65 Dzharkenite FeSe2 P a3 2/m 3 II/D.17-70 Krutaite CuSe2 P a3 2/m 3 II/D.17-80 Trogtalite CoSe2 P a3 2/m 3 II/D.17-90 Penroseite (Ni,Co,Cu)Se2 P a3 2/m 3 II/D.17-100 Laurite RuS2 P a3 2/m 3 II/D.17-110 Erlichmanite OsS2 P a3 2/m 3 II/D.17-120 Sperrylite PtAs2 P a3 2/m 3 II/D.17-130 Aurostibite AuSb2 P a3 2/m 3 II/D.17-140 Geversite Pt(Sb,Bi)2 P a3 2/m 3 II/D.17-150 Insizwaite Pt(Bi,Sb)2 P a3 2/m 3 II/D.17-153 Changchengite! IrBiS P 2 13 2 3 II/D.17-155 Mayingite IrBiTe P a3 2/m 3 II/D.17-160 Maslovite PtBiTe P 2 13 2 3 II/D.17-170 Testibiopalladite PdTe(Sb,Te) P 2 13 2 3 II/D.17-175 Padmaite PdBiSe P 2 13 2 3 II/D.17-180 Michenerite (Pd,Pt)BiTe P 2 13 2 3