How many octahedral voids are there in 1 mole of a compound havingcubic closed packed structure?

Q: The thermodynamically stable form of phosphorus under room conditionsis black phosphorus. Its unit…

A: Given information,       Orthorhombic unit cell with edges of lengths 3.314, 4.376, and 10.48 Å

Q: 13. Show that the maximum packing ratio in the diamond structure is ë/3/16. [Hint: The structure may…

A: NOTE

Q: A certain element has an atomic radius of 0.193 nm and forms a cubic unit structure with a side of…

A: Radius = 0.193 nm Edge length, a = 0.386 nm

Q: Show that the radius of the largest sphere that can be placed in a tetrahedral interstitial site in…

A: Consider a crystal lattice of edge length ‘a’ with the sphere present in fcc arrangement (corners +…

Q: Consider the following dioxides of fifth-period elements: SnO2, TeO2, and XeO2. (a) Use their common…

A: The penultimate shell in an atom is the second last shell, the largest shell is the valence shell.…

Q: The compounds K2O, ZnS, and ZrI4 all can be described as cubic closest packed anions with the…

A: Anions are larger in size than cations in an ionic solid. So, anions constitute the lattice and…

Q: In a certain unit cell. planes cut through the crystal axesat (2a. 3b. c). (a. b. c). (6a. 3b. 3c).…

A: For the given unit cell, Miller indices for point (2a. 3b. c) are determined as shown below where h,…

Q: 2.3 The diagram below shows a cubic structure. Redraw the structure and identify point defects on…

A: The point defects in the given structure is,

Q: Q4: In the calcium fluorite. CaF2 structure, atoms occupy the position of % % %, which is not filled…

A:

Q: Which of the following statements is/are CORRECT? If an ionic compound with the formula MX forms a…

A: Given that : Formula of compound = M X Anions ( Xn- )  are located in corners and face centers of…

Q: Which of the following characterization techniques are well suited for obtaining the…

A: Since your question has multiple parts, we will solve the first question for you. If you want the…

Q: For FCC structure, a). Calculate the ratio of the tetrahedral-site radius r t to the FCC-atom radius…

A:

Q: A particular form of cinnabar (HgS) adopts the zinc blendestructure. The length of the unit cell…

A:

Q: A compound with the formula Rb3C60 has been shown to demonstrate superconductivity below 30.0 K.…

A: Given information,       Compound formula Rb3C60.        The C60 molecules have a face-centered…

Q: Two patterns of packing two different circles of the samesize are shown here. For each structure (a)…

A:

Q: A face-centered tetragonal lattice is not one of the 14three-dimensional lattices. Show that a…

A: Bravais lattices are defined on the basis of symmetry, not defined in terms of shape and size.…

Q: The compound Pb4In3B17S18 crystallizes in the monoclinic system with a unit cell having a = 21.021…

A:

Q: Calculate the mass density of diamond assuming that it is a close-packed structure of hard spheres…

A: a) Radius of close packed hard sphere is Mass of diamond is 12.01 g/mol. Considering close-packed…

Q: The element titanium has hcp packing with a hexagonal unit cell. The volume of the unit cell is 3.53…

A: The density (d) of the unit cell is calculated as shown below where M is the molar mass of the…

Q: CdS has a band gap of 2.4 eV. If large crystals of CdS are illuminatedwith ultraviolet light, they…

A: a. Hence, the wavelength of light corresponds to the given band gap is 517 nm . This wavelength…

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

A:

Q: A unit cell of Re03 consists of a cubic .1 arrangement of Re atoms with O atoms centred along each…

A: The number of nearest neighbouring atoms is called coordination number.

Q: 2. Prove that the atomic packing factor of hexagonal close-packed is 0.74.

A:

Q: A solid is thought to have an orthorhombic structure. Calculate the positions D and 2θ for the plane…

A: Interpretation-  To calculate the position D and 2θ for the plane 111 expected in the diffraction…

Q: The element Zr has hcp packing with a hexagonal unit cell. The density of zirconium is 6.51 g/mL.…

A: since density = mass of atoms of Zr in cell / volume of cell assuming volume of cell = V Also, we…

Q: The element osmium has hcp packing with a hexagonal unit cell. The volume of the unit cell is 2.80 x…

A: The Hexagonal closed packing is defined as the two-dimensional closed packing between the unit cells…

Q: Does a photon of red light with a frequency of 4.29 * 1014 Hzhave sufficient energy to promote an…

A: The electrons can be promoted to conduction band from the valence band if the band gap energy and…

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: Can you please answer this with serious detail and depth, as in every last little step explained as…

A: Hexagonal closed packing refers to layers of spheres packed so that spheres in alternating layers…

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

A:

Q: In a certain unit cell, planes cut through the crystal axes at (2a, 3b, c), (a, b, c), (6a, 3b, 3c),…

A: Steps to find Miller indices: Write the intercepts of the crystal axes Take the reciprocals Clear…

Q: 5. In a close-packed array containing N spheres, there are N octahedral holes and 2N tetrahedral…

A: a)Given that Al2O3 forms hcp lattice.Here the oxide anion forms the hcp lattice. So, effective…

Q: If the density of solid tungsten is 19.3 g/cm319.3 g/cm3, what is the packing efficiency of WW if it…

A: Given, The packing efficiency is calculated by the formula shown below.

Q: Determine the packing efficiency by calculating the fractionof space occupied by atoms in a…

A: Body centred cubic cell(BCC) is a unit cell consisting of atoms at eight corners and an atom in the…

Q: indicate

A: Dear student I have given answer to your question in the image format.

Q: 02: According to the hard-sphere model, illustrate with draw figure the contributions of atoms in…

A: The hard sphere model of the unit cells give an idea of the atoms present in a unit cell and the…

Q: If the density of solid chromium is 7.15 g/cm37.15 g/cm3, what is the packing efficiency of CrCr if…

A: Given, Density of solid chromium =7.15 gcm3 molar mass of solid chromium = 51.996 gmol

Q: Two patterns of packing for two different circles of the samesize are shown here. For each structure…

A: Unit cell is the smallest repeating unit in a crystalline solid. If this unit is stacked over and…

Q: Which of the following schemes for the repeating pattern of close-packed planes are ways of…

A: if the conjugative layers are different then the packing efficiency is high and generated the closed…

Q: Define polymorphism and allotropy. Give ONE example of materials that have polymorphic…

A: Polymorphism: Polymorphism can be defined as the ability of a substance to crystallize into…

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.