A mineral is any naturally occurring‚ inorganic substance‚ often additionally characterized by an exact crystal structure. Its chemical structure can be exact‚ or can vary within limits. Minerals possess a number of properties that are used as an aid in their identification just like color‚ luster‚ streak‚ cleavage‚ hardness‚ specific gravity‚ and even by their chemical properties‚ composition‚ Hardness‚ Crystal Form‚ Electrical Properties and Melting Points. Here I got a mineral as shown in the
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SOLID STATE MARKS = 04 SOLID STATE A solid is that form of matter that possesses a definite shape and a definite volume. There are two types of solids: Crystalline solids: Solids with a definite geometric pattern and are anisotropic in nature. Examples: Iron‚ copper‚ silver‚ sulphur etc. are some elements which form crystalline solids. Potassium chloride‚ sodium nitrate etc are some of the compounds‚ which are crystalline
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Paragraph 1: Crystal chemical relationship between quartz (SiO2) and FePO4 The following describes the crystal chemical relationship between quartz (SiO2) and FePO4. At temperatures below 980 K‚ FePO4 exists as alpha- FePO4. Beyond the temperature mark of 980 K (at 980 K or higher)‚ FePO4 exists as beta- FePO4. The geometrical symmetry of single cell of α- FePO4 is trigonal while the geometrical symmetry of β- FePO4 is octahedral structure. At the alpha phase‚ the cell parameters shoots up by a
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The X-Ray imaging system has one function‚ and that is to provide a constant flow of electrons that are strong enough to produce and x-ray beam to create an image. There are many different sizes and types of imaging systems but no matter what system you use‚ every type will have three main sections. Those sections are the control console‚ the high voltage generator and the x-ray tube. The x-ray tube is located in the exam room‚ the control console is located in an adjoining room that is separated
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Roberts Mrs. Walsh Chemistry 12 April 2014 Dorothy Crowfoot Hodgkin Crystallography is a combination of math‚ physics‚ and chemistry. It is a physical science of x-ray. Crystallography can help determine many different substance structures that can be beneficial to the world today. Dorothy Crowfoot Hodgkin was a warm and caring woman who made many contributions to the world of chemistry‚ such as determining by X-ray crystallography the structures of penicillin‚ insulin‚ and vitamin B-12. Dorothy
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X-ray Powder Diffraction Analysis: Principles‚ Instrumentation and Applications M.S.Pandian Department of Earth Sciences‚ Pondicherry University‚ Puducherry-605014 Introduction X-ray powder diffraction analysis (XRD) is perhaps the most widely used X-ray based analytical techniques for characterizing materials. As the name suggests‚ the sample is usually in a powdery form‚ consisting of fine grains of crystalline material to be studied. The term ’powder’ really means that the crytalline domains
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What is X-ray Crystallography ? X-ray crystallography is an experimental technique that exploits the fact that X-rays are diffracted by crystals. It is not an imaging technique. X-rays have the proper wavelength (in th Å t ö (i the Ångström range‚ ~10-10 m) t be scattered by the electron cloud of an atom of 10 10 ) to b tt d b th l t l d f t f comparable size. Based on the diffraction pattern obtained from X-ray scattering off the periodic assembly of molecules or atoms in the crystal‚ the electron
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Travis Mruzik Mark Moylan COMA 103 8 June 2015 Specific Purpose: I am going to be informing my classmates about the development of X-rays and their use in the medical field. Thesis: Almost everyone knows that X-rays exist and generally what they are used for‚ but I am going to explain more about their development‚ use‚ and risks involved. I. Introduction a. Almost everyone has had exposure to X-rays for one medical reason or another‚ but the medical field has come a long way since these important
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nucleophile on soft electrophile‚ we have suggested an alternative reaction mechanism for the formation of thiazole-2-imine. Our mechanism is supported by isolating the reaction intermediate‚ confirming its structure and that of the products by X-ray crystallography (2). Having understood the reactivity of thioureas toward α-haloketones‚ recently‚ we have suggested an alternative structure for the product obtained by the reaction of thiourea with chloroacetylchloride (3). The structure of the product is
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On the surface‚ the image of Hans appreciating the picture of his beloved as she rides away doesn’t sound out of the ordinary. However‚ when taking a look at the image this “portrait” provides‚ it’s a little less than conventional. An X-ray is essentially a picture of a person’s skeleton‚ and skeletal figures are a big aspect of the Mexican Day of the Dead holiday. During this day‚ family and friends get together to pray for and remember their passed loved ones‚ and provide food and drinks to help
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