PPT-1 Optical Properties of Minerals

GLY 4200 Fall 2016 2 Path Differences In Crystals Waves entering an anisotropic crystal will generally experience two indices of refraction in two perpendicular directions Even planepolarized radiation will be split into the Ordinary O and Extraordinary E vibrating . So what is a mineral?. What are the characteristics of all minerals?. Mineral . Characteristics. 1. A mineral occurs naturally.. 2. A mineral is solid.. 3. A mineral has a definite chemical composition.. Magnetism Feel. Taste . Smell. Optical Properties. Magnetism. Lodestone – natural compass. Magnetite. Feel. Graphite. feels greasy. Talc. feels soapy. Taste. Halite. is rock salt, so it tastes salty.. UNIT -4. They assist in the identification of minerals – . study their optical properties under the microscope. . . Minerals . are inorganic chemical compounds having a certain lattice shape, size and symmetry, being a result of the geometrical arrangement of the constituents (chemical elements such as Si, Al, O, . biotissues. D.A. Loginova. 1,2. , E.A. Sergeeva. 1. , P.D. Agrba. 2. , . and M. Yu. Kirillin. 1. 1 . Institute of Applied Physics RAS, Nizhny Novgorod, Russia. 2 . Lobachevsky. State University of Nizhny Novgorod, Nizhny Novgorod, Russia. If you closed your eyes and tasted different foods, you could probably determine what the foods are by noting properties such as saltiness or sweetness. . You can also determine the identity of a mineral by noting different properties.. Chapter 5. Minerals of Earth’s Crust. Chapter. 5. Standards. SES3d. Explain . the processes that transport and deposit material in terrestrial and marine sedimentary basins, which result, over time, in sedimentary rock. . All rocks are made up of 2 or more of these minerals. . Minerals are not rocks!. Silicon and oxygen are the most abundant elements in the crust and in minerals. Oxygen is the most abundant element in minerals. A pure substance, such as a mineral, can be identified from observations and tests performed to determine its physical properties. These properties are based on the unique structure of the substance.. naturally. existing . chemical compounds.. 2)Minerals can be identified by their . physical properties. .. 3)What are the four characteristics of a mineral?. Naturally occurring. Crystal Structure/Chemical Substance. Mineral Characteristics. What is a mineral?. Naturally . occuring. Not . man-made. (synthetic) or biologically produced. . Pearls, . styrofoam. , charcoal are not minerals. Inorganic. Not formed from processes involving organisms (living or once living). Chemical properties of optical glass Christopher Liu OPTI 521 – Fall 2013 Why does chemical resistance matter? Not every optical system is used in a controlled laboratory environment Therefore, our design must accommodate the worst-case conditions the device will encounter Appearance of a fresh mineral surface in reflected light. 1. Metallic Luster. 2. Vitreous Luster- glassy luster. 3. Resinous Luster. 4. Pearly Luster. 5. Silky luster. Pyrite. Quartz. Orpiment. Muscovite. Understand how mineral crystals acquire their shape. Understand the characteristics that define a sample as a mineral. Understand that many minerals are composed of similar elements. Understand the connections between minerals and rocks and that many rocks contain similar minerals. Background Information!. The Earth’s crust is made of mostly rocks and soil.. The rocks are made of different combinations of . minerals.. Minerals . are made of . elements. . (. Remember an element .