Calculate the empirical formula and density of nitinol, the memory alloy composed of nickel and titanium with the unit cell shown in Figure P12.9. The atomic radii of Ni and Ti are 124 and 147 pm, respectively. lod oi shizo = Ti = Ni

Q: Calculate the atomic packing factor for diamond (refer to Fig. 15C.15); assume that the atoms touch…

A: In crystallography, atomic packing factor, packing efficiency or packing fraction is the fraction of…

Q: please help? make the answer clear

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Q: An element has hcp packing with a hexagonal unit cell. Its density is 21000 kg/m3 and the unit cell…

A: The density of HCP molecule can be shown as:Where, d is density of cellM is molar mass of elementA3…

Q: . Sketch unit cells for FCC BCC and simple cubic, give examples metals that follow each of these…

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Q: C60 fullerenes crystallizes into a cubic close-packed structure known as fullerite, with a lattice…

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Q: A. What is the empirical formula of the ionic compound? B. What is the coordination number of the…

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Q: Na+ (a) If you consider only the Na+ ions, still be described as having a O body centered cubic unit…

A: In the lattice structure of NaCl, if we consider only Na+ ions, we are to discuss the structure.

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: Calculate the atomic radius of Chromium (Cr), given that it has a body-centred cubic (BCC) crystal…

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Q: An element has ccp packing with a face-centered cubic unit cell. Its density is 1770 kg/m3 and the…

A: Density = 1170 kg/m3 =1.170 g/cm3 Unit cell volume, a3 = 1.50 x 10-22 cm3 Since it is fcc, the…

Q: An element has hcp packing with a hexagonal unit cell. Its density is 13.3 g/cm3 and the unit cell…

A: Density = 13.3 g/cm3Unit cell volume, a3 = 4.48 x 10-29 m3 = 4.48 x 10-23  cm3For hcp, Z = 4

Q: An AX ceramic compound has an HCP crystal structure. If the radii of the A and X ions are 0.12 and…

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Q: closest-packed sulfide ions with zinc(II) ions occupying all of the tetrahedral interstices…

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Q: Is interatomic bonding in ceramics always ionic? Or is that false?

A: Ceramics : These are very brittle , corrosion resistant material made from inorganic non metallic…

Q: The volume of a BCC cell is 2.6 x 10-25 m³. Determine the atomic radius in nanometers. O 2.764 nm O…

A: Given that : The unit cell is BCC Volume = a3 = 2.6×10-25 m3 where a= unit cell edge length r =…

Q: (a) 03 N a2 αι

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Q: Draw an orthorhombic unit cell, and within that cell a [121] direction.

A: Introduction An orthorhombic unit cell is a type of crystal lattice that has three mutually…

Q: Sketch the (110) plane in a bcc unit cell and give the positions of the atoms whose centers are…

A: For plane (110), represent movement in X, Y and Z direction, the direction is given by cartesian…

Q: The energy gap of GaAs is 1.4 eV, a lot higher than that of Ge, the element between them in the…

A: The objective of the question is to identify the reasons why  is having a higher band gap than .

Q: Which of the following structures is based on the cubic close-packing of cations?

A: Out the given compounds, CsCl is based on the cubic close-packing of cations. The Cs+ or Cl- ions…

Q: What is the formula of a compound in which the element ‘Y’ form hep lattice and atoms of ‘X’ occupy…

A: In a unit cell, atoms are present at corner, faces and edges depending upon the type of unit cell.…

Q: hcp

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Q: (a) Pure iron has a change in crystal structure from BCC to FCC when heating up above 912°C. If the…

A: A unit cell is a most basic and least volume consuming repeating structure of any solid.  BCC- Body…

Q: How does the sea-of-electrons model explain the high electrical conducitivity of gold ?

A: Metallic bonding is a type of chemical bonding, the cations in the metal are surrounded by many…

Q: <p>Explain why the graphite structure of carbon allows graphite to be used as a lubricant, but…

A: In graphite, flat sheets of carbon are connected together in the form of interconnected hexagonal…

Q: Identify the structure of each of the two-unit cells shown in Problem 47 as the rock salt structure,…

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Q: An AX ceramic compound has an HCP crystal structure. If the radii of the A and X ions are 0.114 and…

A: We need to find density of material.

Q: The structure of the unit cell when CaF, crystallizes is shown below: What is the arrangement of the…

A: In CaF2 unit cell, each Ca2+ is surrounded by 8 F- atoms.

Q: Calculation of lonic Radii The edge length of the unit cell of LiCl (NaCl-like structure, FCC) is…

A: The unit cell is shown as follows:

Q: The nitride ceramics AIN, GaN, and InN are all semiconductors used in the microelectronics industry.…

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Q: Distinguish between the two different unit cells of ferrite and austenite and refer to the…

A: Ferrite and austenite are ceramic materials that are solutions of iron, nickel, and other elements…

Q: Silicon (Si) and germanium (Ge) can be used as semiconducting materials. The band gap between the…

A: Each metal or metalloid is capable of conducting current when the valence electrons of the atom can…

Q: In many metals, the atoms pack together in a face-centered cubic arrangement. How many atoms are…

A: In many metals, atoms are packed in a particular manner. If A is the arrangement of atoms in the…

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.