Iron Phosphate Structure Lab Report

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Iron phosphate structure with a symbol of FePo4, has crystal structures of FeO4 and PO4 as its tetrahedral links. There would be changes of this quartz type that can be determined by the neutron poly difraction between 294K and 1073K, according to Z. Kristallogr. While structural parameters of the iron phosphate depends on the temperature, whereby iron phosphate would be a beta-phase from an alpha-phase when temperature increases from low to high. Irregularity would also be affected by the change in temperature that is cause by non-physical behavior. When temperature gets higher, atoms of the structure moves vigorously that creates vibration and thus amplitude of alpha increases. As for tilting, it only changes the angle, but
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In alpha-phase, iron phosphate has a hydro structure and has a trigonal unit cell because it found that alpha-phase has three mirror lines, having three one axis. Thus, trigonal unit cell. In a low temperature, which means during the phase of alpha, the structure has the same shape unit cell. This is due to the non-occurance of tilting that can change the unit cell shape. While a beta-phase iron phosphate has a structure of octahedron, having a unit sell of hexagonal. Tilting and bridging angle as well as distance would change greatly as temperature increases. When it is in a right angle, it becomes tetrahedral which results to the rise in degree of bridging angle. There is therefore a change of tetrahedron relationship from alpha iron phosphate to beta iron phosphate, which is from a three one axis to a six four axis. Thus, hexagonal. The structure can be seen to have a six fold axis at the corner and therefore creating a hexagon of tetrahedron around the origin of the structure. There is therefore a larger distance of the bond, leading to the higher degree of dynamic disorder. However, in a lattice symmetry, it can be concluded that both hexagonal and trigonal structure have very similar degree of symmetry, provided that we compare the two within the same axis. It is possible that the structure can have two individual tilt angles of FeO4 and …show more content…
It is considered a transition metal and found to have changes in its structure at different temperatures. Therefore, this paragraph would be split into four main parts explaining iron phosphate in high temperature, low temperature and when it is in an alpha-phase as well as beta-phase. In higher temperature, the atoms of the structure iron phosphate would move around more vigorously as temperature rises higher, therefore there would be a disorder called dynamic disorder of high symmetrical beta-phase. This structure is known to be in a beta-phase when temperature is higher. It has a structure of octahedral and having a dispose or space group of p6422. The structural parameters of such structure is a equals to b and also equals to c. In low temperature, atoms of the structure starts to vibrate less and slowly settle down. It has an alpha-quartz structure and changes to tetrahedra structure from an octahedral structure. It’s dispose group is known to be p3121 with a low symmetrical alpha-phase. This is because at low temperature, iron phosphate would move from beta to alpha. The parameters is slightly different whereby a also equals to b, but not c. As temperature rises, parameter of the structure would move accordingly (increase) and thus volume also increases resulting to a structure expansion. The point to note whereby an alpha iron phosphate changes to beta phosphate and vice versa is when the temperature is

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