GROUP B MODEL ANSWER Howard et al.‚ Temperature-induced structural changes in CaCl2‚ CaBr2 and CrCl2: A synchrotron X-ray powder diffraction Phys. Rev. B 72‚ 214114 (2005). DO NOT PLAGIARISE THIS MODEL ANSWER Paragraph 1 The polymorphs involved are the halides in tetragonal rutile (TiO2) structure and the halides in so-called calcium chloride structure. As the name implies‚ the unit cell of halides in tetragonal rutile structure is tetragonal‚ with the lattice parameters a=b≠c and α=β=γ=90o
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pattern. • Such as glass‚ plastic‚ gel Question 1. X rays from a copper X-ray tube (λ = 154) were diffracted at an angle of 14.22 degrees by a crystal of silicon. Assuming firstorder diffraction (n= 1 in the Bragg equation)‚ What is the interlunar spacing of silicon? nλ = 2d sin θ 1(154) = 2d sin 14.22 154 = 2d (0.245) 2d = 626.92 d = 313.46 2. A topaz crystal has an interplanar spacing (d) of 1.36 Å (1 Å = ). Calculate the wavelength of the X ray that should be used if θ = 15.0° (assume n = 1) nλ
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compound changes to a liquid when the molecules acquire enough energy to overcome intermolecular forces holding them together in an crystalline lattice structure. The melting point range is defined as the span of temperature from the point at which the crystals first begin to liquefy to the point at which the entire sample is liquid. This data can be tabulated experimentally through multiple trials for an unknown and referenced against the chemistry literature for a known compound. In Macroscale and Microscale
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Department of Finance Fisher College of Business The Ohio State University Prof. George Pinteris Handout on Crystal Ball This handout supplements the lecture notes on Monte Carlo simulation techniques. In this handout‚ I will discuss how to use Crystal Ball to fit a distribution to historical data and how to produce tornado and sensitivity charts that allow the analyst to evaluate the impact of the model’s driver(s) on the model’s variable(s) of interest (such as firm value or NPV in the
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-X-OI (X\ cW:>J~‚R.S C>(\...t. "’V’(‚ el"\.9\.) k‚ _- _- (3) MgO - :to’Y\\c.. / ~onic-type crystals I a) (5 pts) Using the provided crystal diagram on the next page‚ what is the coordination number ofKBr (show your work for full credit) ifrK+ = 0.133 nm and rSr-= 0.196 nm? eN r (o’/n"’-cY’ 0;.. I‚;‚(\""’" • t ~(.p tI m _ • r‚AY\;--M ’; • (p 7 I b) (15 pts) Using the crystal structure determined from above and the radius values given‚ calculate the ionic packing fraction for
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History of Crystal Meth Crystal meth otherwise known as Amp‚ Crystal‚ and Speed is a highly dangerous drug. Crystal meth was first developed in Japan in 1919. It was used to keep troops awake. Japanese Kamikaze pilots were given crystal meth before their suicide missions. In 1950 crystal meth was used as a defense against depression. It was mainly used by college students‚ truck drivers‚ and athletes. In 1970 the US government declared crystal meth to be dangerous and illegalized it. Effects
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Crystal Cave of Giants The Naica mine is located in Chihuahua‚ Mexico and was first discovered in 1794. The mines primary interest was silver and gold until about the 1900’s when a large-scale mining began as Zinc and Lead become more valuable resources. This is the largest mine in the country that produces lead‚ zinc and silver‚ among other minerals. The entrance is located 1385 m above sea level in the north of the 12km.-long sierra Naica. In April of 2000‚ brothers Elroy and Javier Delgado
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Crystal making lab Purpose: To better understand saturated solutions‚ solubility . Analysis: 2. Why was it necessary to heat the water? Be specific. Heating the water allows it to hold much more borax in solution than it could at room temperature. So after the water cooled‚ the ability of the solution to hold the solute inside decreases‚this causes the excess borax in the solution to precipitate in crystal form on the string.When the water at a high temperature‚ water molecules have more kinetic
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The Function of a Crystal Radio What is the first thing that comes into your mind when you think about the function of the radio? Is the first thing that pops into your mind the word ‘magic’? Despite the fact that it seems like it is magical and comes out of the air‚ radio and the use of the radio is very scientific. When broken down and analyzed‚ the function of the radio is more scientific than magical. The miraculous way that you can send out invisible information through thin air and can
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Before watching the videos on crystal meth I was very uneducated when it came to the drug. After watching the Oprah Winfrey Show and Meth is Death video‚ it was very easy for me to come to the conclusion that crystal meth is a very intense and addictive drug. On the Oprah Winfrey Show‚ Oprah describes crystal meth as being the most dangerous drug in America and the biggest problem officers face concerning drugs. She also says crystal meth is not popular with a particular group of people. Rather
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