2. what do you understand by a crystal latuce and the unit cell? In an fcc lattice cach unit cell has a lattice point at the centre of cach face in addition to those at the corners. (i) Write down the position of atoms. (ii) What will be the primitive cell for the space lattice?

Q: The first LEDs were made from GaAs, which has a bandgap of 1.43 eV. What wavelength of light would…

A: Unit of energy is converted as follows,

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: Consider the lattice energies of the following Group 2Acompounds: BeH2, 3205 kJ/mol; MgH2, 2791…

A: (a) All the atoms Be, Mg, Ca, Sr and Ba belong to group 2A , so they all have +2 oxidation states in…

Q: Draw the structures of manganate and permanganate ions and predict their magnetic character.

A: Draw the structures of manganate and permanganate ions and predict their magnetic character.

Q: A compound orthorhombic cell has cell (a = 588, b = 820 and c = 796 pm). Find the density more…

A: This question deals with the density of an orthorhombic cell. The density of a unit cell is the…

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

A:

Q: Account for the relative bandgap energies of semiconductors interms of periodic trends?

A: Semiconductors are materials which have a conductivity between conductors (generally metals) and…

Q: Show for the face-center cubic crystal structure that the unit cell edge length a and the atomic…

A: In a face-center cubic crystal, atoms occupy all corners and faces of the cube. The space filled…

Q: 1) The volume of one ruthenium atom (molar mass = 101.1 g/mol) is 1.211x10 2³cm³. What would be the…

A:

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: Iron titanate, FeTiO3, forms in the ilmenite crystal structure that consists of an HCP arrangement…

A: (a)The formula unit of iron titanate can be written as FeO TiO2.Calculating the cation-to-anion…

Q: The unit cells of SbCl3 are orthorhombic with dimensions a = 812 pm, b = 947 pm, and c = 637 pm.…

A:

Q: Sketch the [1̅010] directions in a hexagonal unit cell

A: Procedure for drawing planes for [1̅010]. 1. Converting four index miller indices of [1̅010]. into…

Q: Distinguish  between the bond thos exist  In CsCl and SiC Crystals.

A: Chemical Bond: Chemical bonds are type of forces which hold two or more than two atoms to form a…

Q: The cell parameters and lattice angles for the tetragonal a = 3.785 Å a = 90* %3D b = 3.785 Å B =…

A: Solution -

Q: The minority carriers in p-type semiconductors are

A: Doping is the process by which conductivity of a semi conductor increases. When an element of group…

Q: How may the conductivity of an intrinsic semiconductor be increased?

A: The intrinsic semiconductor is a type of semiconductor which is pure semiconductor, which has no…

Q: Construct a (011) within a unit cell.

A: A lattice plane in a unit cell is those plane whose intersections with the lattice are periodic.

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: Use the Born-Mayer equation to estimate the latticeenthalpy of calcium sulfide. CaS. The crystal…

A: The Born-Mayer equation is that equation whose function is to calculate the lattice energy of an…

Q: Which variables must be contolled and in what manner to produce Diamond from Graphite?

A: Carbon exists in three forms as follows: Graphite Diamond Fullerene Diamond is the hardest form of…

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

A:

Q: How much is the energy required for vacancy formation for Pb at its melting temperature of 620.6°F…

A:

Q: What is the minimum number of atoms that could be containedin the unit cell of an element with a…

A: Since in a body centered cubic lattice, we have 1 atom in body centre and 8 atoms, 1 on each corner.…

Q: Which would you expect to be the more ductile element,(a) Ag or Mo, (b) Zn or Si? In each case…

A: Silver is a more ductile element than molybdenum. Ag has more valence electrons which makes the…

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: (a) Given the ionic radii, Cst = 1.67Å, CI = 1.81Å, and the Madelung constant M(CSCI) = 1.763,…

A: Interpretation -  To determine the molar crystal energy of CsCl . Check that theoretical value of…

Q: (a) In the cubic crystal structures, as the values of the Miller indices (h, k, and 1) increase,…

A: Miller indices are group of three values (hkl) that indicates the set of parallel planes of atoms in…

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: Show that the ratio of cations to anions in the unit cell of AgI corresponds to the ratio of cations…

A: The unit cell structure of silver iodide (AgI) can be given as :

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: 3- Calculate the radius of an iridium (IR) atom, given that IR has an FCC crystal structure, a…

A:

Q: Q10a. Explain order parameter and its importance in respect to liquid crystal materials? What are…

A: Answer - According to the question - Liquid crystal is a state of matter that has properties between…

Q: Q2. Give a list ONLY for the following items: 1. The main bases on which crystallographic systems…

A: We have asked to give only list for the item given and the answer to this question is given in…

Q: What is the meaning of magnetic susceptibility, orbital motion, ferromagnetism and…

A:

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: Calculate the separations of the planes {112}, {110}, and {224} in a crystal in which the cubic unit…

A: Given data, Planes = {112}, {110}, and {224} Cubic unit cell has side 562 pm. Calculate the…

Q: Sketch [0110] and [2243] in an HCP unit cell.

A: Solution: We will draw a hexagonal unit cell with ruled co-ordinate system as follows: Point O is…

Q: Express the relationship between atomic radius(r) and the edge length (a) of the fee unit cell.

A: The unit cell represents the smallest possible portion of a crystal lattice in a three dimensional…

Q: Explain face centered cubic unit cell in the simplest way possible and create an overview about it…

A: Face centered cubic unit cell: It is a Nonprimitive cubic unit cell.  In case of simple cubic unit…

Q: 1.List the point coordinates for all atoms that are associated with the FCC unit cell.

A: FCC cell refers to Face centered cubic lattice in which the atoms are present at the center of each…

Q: What is the difference between tetrahedral and octahedral voids?

A: The difference between tetrahedral and octahedral voids can be shown in below

Q: Describe the features of Network Covalent Atomic Solids, Carbon and Silicates?

A: The features of Network Covalent Atomic Solids, Carbon, and Silicates have to be given.