Mineraller ve özellikleri ambilojenit General Amblygonite Information Chemical Formula: (Li,Na)Al(PO4)(F,OH) Composition: Molecular Weight = 151.41 gm Sodium 3.80 % Na 5.12 % Na 2 O Lithium 3.44 % Li 7.40 % Li 2 O Aluminum 17.82 % Al 33.67 % Al 2 O 3 Phosphorus 20.46 % P 46.88 % P 2 O 5 Hydrogen 0.17 % H 1.49 % H 2 O Oxygen 44.91 % O Fluorine 9.41 % F 9.41 % F - % F -3.96 % -O=F 2 ______ ______ 100.00 % 100.00 % = TOTAL OXIDE Empirical Formula: Li0.75Na 0.25Al(PO 4)F 0.75(OH)0.25 Name Origin: From the Greek amblys - "blunt" and goni - "angle." Synonym: ICSD 26513 PDF 22-1138 Amblygonite Crystallography Axial Ratios: a:b:c =0.7289:1:0.7078 Cell Dimensions: a = 5.19, b = 7.12, c = 5.04, Z = 2; alpha = 112.033°, beta = 97.816°, gamma = 68.116° V = 158.71 Den(Calc)= 3.17 Crystal System: Triclinic - PinacoidalH-M Symbol ( 1) Space Group: P1 X Ray Diffraction: By Intensity(I/I o): 2.925(1), 3.151(1), 4.64(1), Forms: [ 3 3 2] [ 0 1 1] [ 0 1 0] [ 0 2 1] [ 1 1 0] [ 1 0 0] [ 0 0 1] Physical Properties of Amblygonite Cleavage: [100] Perfect, [110] Good, [011] Distinct Color: White, Yellow, Gray, Bluish gray, Greenish gray. Density: 2.98 - 3.11, Average = 3.04 Diaphaniety: Transparent to Subtransparent to translucent Fracture: Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern. Habits: Columnar - Forms columns, Euhedral Crystals - Occurs as well-formed crystals showing good external form., Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline). Hardness: 5.5-6 - Knife Blade-Orthoclase Luminescence: None. Luster: Vitreous - Pearly Streak: white Optical Properties of Amblygonite Optical Data: Biaxial (-), a=1.58-1.6, b=1.59-1.62, g=1.6-1.63, bire=0.0200-0.0300, 2V(Calc)=68-88, 2V(Meas)=50.