Does titanium expand or contract as it transforms from hcp to bcc? The atomic radius of titanium is 145.8 pm in hcp but 142.5 pm in bcc. Hint: Consider the change in packing fraction.

Q: The polypropylene (repeat unit CH3CHCH2) in a plastic object has a molar mass of 2.8x10^5 g/mol and…

A: Calculate the degree of polymerization: n=Molecular weight of polymerMolecular weight of…

Q: Calculate the planer density of planes (0:-1:-1) for BCC, and FCC crystal structures?

A:

Q: What is the first-order scintillation angle of the shimmering x-rays of a crystal surface with a…

A: Given that: Order of Scintillation (n)= 1 Distance between the two planes (d) = 0.204nm Wavelength…

Q: An orthorhombic unit cell has dimensions a = 769 pm, b = 891 pm, and c = 690 pm. Calculate the…

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Q: An element of atomic mass 98.5 g mol-1 occurs in fcc structure. If its unit cell edge length is 500…

A: In face centered cubic (fcc) lattice, there are ions or molecules present at the corners of cube and…

Q: The unit cell for tin has tetragonal symmetry, with a and b lattice parameters of 0.583 and 0.318…

A: It is given that tin has a tetragonal symmetry and a and b are lattice parameters and their values…

Q: How many Mn4 + and O2- ions are in the unit cell of the rutile MnO2?

A: The rutile structure for MnO2 can be given as follows:

Q: what is the density of tantalum in a unit cell g/cm^3 with a z number of 2 and a pm of 331

A: The density of a unit cell is defined as the ratio of mass and volume of the unit cell. The mass of…

Q: Questión 4 Tungsten is BCC and has a lattice constant a of 0.31648 nm. Calculate the following…

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Q: Calculate the maximum porosity in percentage (%) for a rhombohedral packing.

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Q: For the structure of ZnS as shown: Describe the packing of S2- according to the closest packing of…

A: As per the given structure of ZnS, the packing of S2- is FCC (face-centered cubic).  This form of…

Q: Draw a triclinic unit cell and mark on it the (100), (010), (001), (011), (101), and (110) planes.

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Q: (a) On the basis of micro-structural considerations, explain why polymers generally have a low…

A: Since you have asked for question 1 (part a). I am answering that. Please find the solution attached…

Q: Draw an orthorhombic unit cell and mark on it the (100), (010), (001), (011), (101), and (110)…

A: The planes of the orthorhombic unit cell can be drawn by taking the reciprocal of the coordinates to…

Q: The second-order Bragg diffraction of X-rays with l= 1.660 Å from a set of parallel planes in copper…

A: The Bragg equation is given as: nλ=2d sinθwhere,n is an integerd is the distance between the atomic…

Q: Copper crystallizes in an fcc structure with unit cells of side 361 pm. (a) Predict the appearance…

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Q: The unit cell for tin has tetragonal symmetry, with a and b lattice parameters of 0.583 and 0.318…

A: From given a and b lattice parameters and density, atomic weight, atomic radius we are calculating…

Q: The coordinates, in units of a, of the atoms in a cubic P unit cell are (0,0,0), (0,1,0), (0,0,1),…

A: Given: Coordinates: (0,0,0), (0,1,0), (0,0,1), (0,1,1), (1,0,0), (1,1,0), (1,0,1), and (1,1,1)

Q: Iron (II) oxide (FeO) is a ceramic that has the same crystal structure as NaCl. Given: R(Fe2)= 0.087…

A: The correct option is g : 0.59

Q: Given the copper ion radius = 0.74 Å and the chloride ion radius = 1.81 Å, i. Estimate the edge…

A: From the image It is a unit cell of CuCl. The unit cell has Zinc Blende(ZnS) type structure .In…

Q: hcp

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Q: If the density of solid chromium is 7.15 g/cm, what is the packing efficiency of Cr if it adopts a…

A: Given data:

Q: a) It is considered that a solid substance has an orthorhombic structure, Since the edges of the…

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Q: 4. About the surface energy; (a) The surface energy of a single crystal depends on the…

A: (a) Answer - According to the question - Given - The surface energy of a single crystal depends on…

Q: A powdered diffraction photograph from tungsten shows lines that indexes as (110), (200), (211),…

A: Given  Lines 110 200 211 220 310 222 321 400

Q: The unit cell for tin has tetragonal symmetry, with a and blattice parameters of 0.5 and 0.318 nm,…

A:

Q: Calculate the packing efficiency of a body-centered unit cell.

A: Bode centered unit cell (BCC)- BCC unit cell has atoms at each corner of unit cell and one atom at…

Q: ) Use your knowledge of unit cell symmetry, dimensions and coordination geometry to compare and…

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Q: QI. Calculate the linear density of directions [011] for BCC, and FCC crystal structures?

A: Body centred cubic close packing is represented as BCC whereas face centred cubic close packing is…

Q: Sodium metal with a bcc structure has two atoms per unit cell. The radius of the sodium atom is 1.85…

A: Mean free time = me/q2np  Here,  me is the effective mass of the conduction electrons  =…

Q: The polypropylene (repeat unit CH₃CHCH₂) in a plastic toy has a molar mass of 2.8X10⁵ g/mol and a…

A: Here poly propylene  is a polymer having propene as a monomers. The monomeric unit added itself to n…

Q: A crystal has a cubic unit cell of 4.2 Å. Using a wavelength of 1.54 Å at which 2θ value would you…

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Q: In which of the following unit cells is drawn a (10T) plane?

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Q: Q2. Calculate the planer density of planes (011) for BCC, and FCC crystal structures?

A: Planar density is defined as the number of atoms per unit area that is centered on a plane. So,…

Q: what are antiferromagnetic and ferromagnetic solids?

A: The terms ferromagnetic and antiferromagnetic are related to behaviour of materials in presence of…

Q: Calculate the ratio of the maximum radius of an interstitial atom at the center of each face of a…

A: Let us say the radius of the host atom is r1 and r2 is the radius of the interstitial atom Then from…

Q: Sketch the electronic band structure of a semiconducting material, and give an example for an…

A: Semiconductors  The conductivity of semiconductors lies between conductors and insulators. The…

Q: prove that the rc/ra =0.225 for coord number 4 in ceramic crystal structur

A: We have given coordination number given is 4 we want to show that minimum cation to anion ratio…

Q: Calculate the number of atoms/cm2 on the plane (100) of lead (FCC) for which the size of the unit…

A: Planar density: It is defined as the number of atoms divided by unit area of crystallographic plane.…

Q: The experimental value of the density of K is 0.86 g/cm³. If K crystallizes in a cubic unit cell…

A: Hello. Since multiple questions have been posted, the first question shall be only solved in this…

Q: What is the process ofcalculating the Packing Efficiency of a Unit Cell?

A: The fraction of unit cell volume actually contained by the atoms is the Packing Efficiency of that…

Q: What is the effect of temperature on molar conductivity?

A: The effect of temperature on molar conductivity has to be given,

Q: The density of totally crystalline nylon 6,6 at room temperature is 1.213 g/cm3. Also, at room…

A:

Crystal Lattices and Unit Cell

Consider a crystal. The regular and repeating pattern of constituent particles is the most distinguishing feature of crystalline solids. A crystal lattice is formed when these particles are replaced with representative points. The three-dimensional arrangement of constituent particles is known as a crystal lattice. Unit cell is that the smallest portion of a space lattice which when repeated in several directions, generate the whole lattice. Unit cell is a building block of a lattice. It is the smallest unit of cell.