C A L application note Checking the accuracy of PERKIN-ELMER POLARIMETERS H. Stenz‚ Bodenseewerk Perkin-Elmer GmbH Abstract Quartz standards‚ sucrose solutions and optically active pure liquids are discussed as potential polarimetry standards. It is suggested to preferably use quartz standards for checking the accuracy of Perkin-Elmer polarimeters. Quartz standards are absolutely stable‚ have a high accuracy and are easy to use. For laboratories working in an environment which is governed
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Sedimentary rocks from the Barberton greenstone belt‚ South Africa Abstract The Barberton greenstone belt in South Africa represents one of the best preserved successions of Archaean rocks. The rock sequences have experienced low grade metamorphism‚ which makes them ideal to study because the effects of alteration and secondary minerals are relatively small. The sedimentary rocks of the Fig Tree Group obtained through the drilling project “Peering into the cradle of life” are analysed for their
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mentioned in the article will be FePO4. The article analyses and discusses on a quartz-type compound‚ the Iron phosphate FePO4 and its structural evolution. In this assignment‚ the quartz will be referred to as SiO2. Under an experiment conducted‚ the temperature was ranged within 294K to 1073K. At high temperature‚ the structural parameter of FePO4 would converges to a β-quartz whereas it will converges to a α-quartz at lower temperature. As for the phase transition state‚ it will be situated at
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include seven of those listed below. To help you identify them‚ refer to the Mineral Identification Job Aid. • Borax • Calcite • Corundum • Graphite • Gypsum • Orthoclase feldspar • Pyrite • Quartz • Talc • Topaz 4. Post Part 1‚ Part 2‚ and Part 3 in this worksheet as an attachment to your Assignment Section. Delete the introductory instructions in this worksheet before you submit it to your instructor. Part 1: Recording
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THE GEOLOGY OF IBODI AREA‚ ILESHA. REPORT ON THE INDEPENDENCE GEOLOGICAL FIELD MAPPING AT ILESHA‚ OSUN STATE SUBMITTED TO THE DEPARTMENT OF GEOLOGICAL SCIENCES‚ OSUN STATE UNIVERSITY‚ OSOGBO. July 2013 CHAPTER ONE: INTRODUCTION 1.1 LOCATION OF THE MAPPED AREA The mapped area is located in Ilesha Atakunmosa local government area of Osun State‚ Nigeria. The area mapped lies approximately within latitudes 7° 34’ and 7° 37’ north and equally lies approximately within 4° 39’ and 4° 42’
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There has been a recent excitement about the relatively new quartz-based surface known as Caesarstone‚ and in this article we will we answering some frequently asked questions about this engineered stone. 1 WHAT CAN I USE CAESARSTONE FOR? Caesarstone is an engineered quartz surface‚ used as an attractive and adaptable surface for residential‚ commercial and institutional buildings. Caesarstone can be used for countertops and backsplashes‚ shower and tub surrounds‚ lavatory and sinks‚ wall panelling
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rain water drips through the caves‚ making the Calcite in the rock dissolve and form stalagmites. Calcite has a glassy luster and a hardness of 3 on a mohs scale. Many minerals have a lot of similarities and differences to Calcite. For example; Quartz and Calcite are similar
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Writing Exercise – FePO4 Polymorphs 1. Compare and contrast the crystal structures and crystal chemistry of quartz‚ α-FePO4 and β-FePO4. FePO4 is a quartz-type of iron phosphate. It is different from other α-quartz isotypes due to the fact that the A-cation is a transition metal. The low-temperature α-phase can be from 294k neutron powder diffraction to high-temperature β-phase 1073K. As the quartz start to transit at 980K‚ from α-β‚ the Fe-O-P bridging angles start to increase value and the tetrahedral
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text. Shown is quartz with well developed crystal faces. Does quartz always grow to show crystal faces? Why or why not? -5% from quiz 9. Is quartz always “crystalline”? Why or why not? Yes quartz is always crystalline because it has a repetitive atomic structure all minerals are‚ by definition‚ crystalline 10. What is cleavage? What causes it? Why doesn’t quartz have cleavage? Cleavage is when a mineral breaks along an area of weak bonding. Stress causes cleavage. Quartz doesn’t have
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1.Compare and contrast the crystal structures and crystal chemistry of quartz α-FePO4 and β-FePO4 FePO4 is an extremely distinct quartz as its cation is a transition metal. It is often looked in depth at temperatures ranging from 294K to 1073K. When it is at a relatively low temperature‚ we see the quartz at α-FePO4. It takes on a tetrahedral shape. At higher temperatures‚ the α-FePO4 will transition to β-FePO4 and takes on an octahedral shape. Very importantly‚ the temperature at which this transition
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