Mineraller ve özellikleri Kuvars General Quartz Information Chemical Formula: SiO2 Composition: Molecular Weight = 60.08 gm Silicon 46.74 % Si 100.00 % SiO 2 Oxygen 53.26 % O ______ ______ 100.00 % 100.00 % = TOTAL OXIDE Empirical Formula: (SiO 2) Environment: Sedimentary, metamorphic, and igneous rocks. IMA Status: Approved IMA 1962 Locality: Very common mineral found world wide. Link to MinDat.org Location Data. Name Origin: From the German "quarz", of uncertain origin. Synonym: Agate - banded variety of chaledony Amethyst - purple Avanturine - feebly translucent chalcedony Carnelian - flesh red chalcedony Cat's Eye - chatoyant Chalcedony - microcrystalline quartz Chert - cryptocrystalline quartz Chrysoprase - apple green chalcedony Citrine - yellow Flint - microcrystalline quartz Hornstone - flint Jasper - red or brown chalcedony Moss Agate - variety of chaledony Plasma - green chalcedony Prase - leek green chalcedony Rock Crystal Rose Quartz - rose colored Sapphire Quartz - blue colored Smoky Quartz - brown to black Tiger Eye - pseudomorph of asbestos Quartz Crystallography Axial Ratios: a:c = 1:1.10013 Cell Dimensions: a = 4.9133, c = 5.4053, Z = 3; V = 113.00 Den(Calc)= 2.65 Crystal System: Trigonal - TrapezohedralH-M Symbol (3 2) Space Group: P 3121,P 3221 X Ray Diffraction: By Intensity(I/I o): 3.342(1), 4.257(0.22), 1.8179(0.14), Forms: Mouse Dbl Clk - Start-Stop Rotation RMB - Cycle Display Modes Drag1 - Manipulate Crystal Drag2 - Resize Keyboard Forms: [ 2 1 1] [ 1 0 1] [ 6 1 1] [ 1 0 0] [ 0 1 1] Warning: this large pop-up is very compute intensive and may not work well with some computers. S - Stereo I - Indicies - Start-Stop Rotation F - Fit to Screen M - Menu Help on Above Physical Properties of Quartz Cleavage: [0110] Indistinct Color: Brown, Colorless, Violet, Gray, Yellow. Density: 2.6 - 2.65, Average = 2.62 Diaphaniety: Transparent Fracture: Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz). Habits: Crystalline - Coarse - Occurs as well-formed coarse sized crystals., Druse - Crystal growth in a cavity which results in numerous crystal tipped surfaces., Crystalline - Fine - Occurs as well-formed fine sized crystals. Hardness: 7 - Quartz Luminescence: Triboluminescent. Luster: Vitreous (Glassy) Streak: white Optical Properties of Quartz Dichroism (e): none. Dichroism (w): none. Gladstone-Dale: CI meas= -0.005 (Superior) - where the CI = (1- KPDmeas/KC) CI calc= 0.005 (Superior) - where the CI = (1- KPDcalc/KC) KPDcalc= 0.207,KPDmeas= 0.209,KC= 0.208 Optical Data: Uniaxial (+), w=1.543-1.545, e=1.552-1.554, bire=0.0090. Quartz Classification Dana Class: 75.1.3.1 (75)Tectosilicate Si Tetrahedral Frameworks (75.1)SiO2 with [4] coordinated Si (75.1.3)Dana Group 75.1.3.1 Quartz SiO2 P 3 121,P 3 221 3 2 Strunz Class: IV/D.01-10 IV - Oxides IV/D - Oxides with metal : oxygen = 1:2 (MO2 and related compounds) IV/D.01 - Quartz group IV/D.01-10 Quartz SiO2 P 3 121,P 3221 3 2 IV/D.01-20 Tridymite SiO2 F1 1 IV/D.01-30 Cristobalite SiO2 P 4 1212 4 2 2 IV/D.01-35 Moganite! SiO2 I2/a 2/m IV/D.01-40 Melanophlogite SiO2·n(C,H,O,S) P 4 1/nbc 4/m 2/m 2/m IV/D.01-40* Melanophlogite-beta! SiO2·n(C,H,O,S) P m3n 4/m 3 2/m IV/D.01-50 Coesite SiO2 C 2/c 2/m IV/D.01-60 Stishovite SiO2 P 4/mnm 4/m 2/m 2/m IV/D.01-70 Lechatelierite* SiO2 None IV/D.01-80 Opal SiO2·n(H2O) None