The metal MIhas an FCC crystal structure. If the angle of diffraction for the (220) set of planes occurs at 69.22°(first-order reflection) when monochromatic x-radiation having a wavelength of 0.1542 nm is used, compute (a) the interplanar spacing for this set of planes,(b) the lattice parameter (the cubic edge length)a, (c) atomic radius for aMIatom.

Q: Metal borides MBx exist for many transition metals.  a) What is the minimum radius for the host…

A: a) The radius of an atom in the octahedral void is related to the radius of the atoms forming the…

Q: Among well-known structure types, NaCl, Zinc Blende (ZnS), Wurtzite (ZnS), Rutile (TiO2), Fluorite…

A: Structure of ionic crystals--- Ionic crystals Coordination number NaCl Na+ = 6 Cl- = 6 ZnS…

Q: Given the HCP crystal diagram, what is the index (vector/plane) as indicated inside the unit cell…

A: Answer: The  hexagonal close packed crystal diagram (HCP) is shown here.

Q: Given the following structure, where the white atoms are thorium, and the yellow are oxygen.…

A: ThO2 has fluorite structure. MX2 type of crystal structure. Where X ions tends to occupy eight…

Q: Consider a metal with a BCC crystal structure and atomic weight 92.91 g/mole. When monochromatic…

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: Calculate the number density of valence electrons in a certain metallic element given that the…

A:

Q: The metal niobium has a BCC crystal structure. If the angle of diffraction for the (211) set of…

A: Use Bragg's Law to calculate the value of the interplanar distance....where,n = order of…

Q: Question B1 a) A hexagonal close-packed layer in two dimensions is shown in figure 2. By identifying…

A: To calculate the packing fraction for  (a) a hexagonal close-packed layer (or HCP lattice) (b) (i) a…

Q: If Na+ ions were to substitute for magnesium ions in MgO, in order to preserve electroneutrality,…

A: Impurity defects are produced in the MgO crystal. Two Na+ ions replaced one Mg2+ ion for…

Q: (a) Draw the unit cells of i) FCC and ii) BCC. In the FCC unit cell, sketch and label one of the…

A: Where, FCC is the Face centered Cubic unit and the BCC is the Body centered Cubic unit, FCC and BCC…

Q: 1(c) (ii) What do you understand by stacking faults in a crystal?. Discuss the mechanism of…

A: This is a question based on defect in crystal lattice. Solved in step 2.

Q: 17. Which of the following is not true for diamond structure? Each carbom atom is sp3 hybridised…

A: The incorrect statement about diamond has to be given,

Q: if CsCl it is not correct to invert this unit cell and say that it is based upon with colorless…

A: A crystal lattice is a three-dimensional arrangement of atoms, ions, or molecules in a repeating…

Q: (a) To what crystal system does the unit cell belongs. (b) What would this crystal structure be…

A: It is helpful to introduce crystallography, the study of the formation, structure, and properties of…

Q: The mineral clausthalite is composed of lead selenide (PbSe). This mineral adopts the NaCl structure…

A: Unit cell can be defined as the repeating unit in crystal structure.

Q: Iron at January 12th continues heating from a BCC crystalline structure to an FCC crystalline…

A: The smallest unit which on repetition gives a crystal lattice is named as a unit cell. The net atoms…

Q: As a solid CrCr adopts a body-centeredbody-centered cubic unit cell with an edge length of 289…

A: Edge length, a = 289 pm 1 pm = 10-10 cm a = 289 × 10-10cm For BCC, Number of atoms per unit cell = 2

Q: . Explain the relationship between the number of bonds that can be formed by a typical atom in a…

A: The structure of the substance is affected by number of bonds in a compound, when the bonds formed…

Q: Iron (Fe) has both face-centred cubic (fcc) and body-centred cubic (bcc) crystal structures, show…

A:

Q: Polyethylene can crystalline in crystallites with the chains aligned in an orthorhombic unit cell…

A: A unit cell is the smallest unit which when repeated in all the directions gives rise to a crystal.…

Q: Based on the unit cell shown, what is the formula of the structure on the left (i.e. the one labeled…

A: A unit cell of a crystal is the smallest repeating unit of space lattice from which the entire…

Q: How many complete flourine atoms are present in a single unit cell of flourite (CaF2)?

A:

Q: 3. Within a cubic unit cell, sketch the following directions: (a) [110] (c) [012] (e) [111] [121]…

A: Miller indices is a group of three numbers that indicates the orientation of a plane. The three…

Q: how do u know its 1,1,0?

A: In the given question we have a plane (1,1,0) defined in the space where we place a plane parallel…

Q: In their book X-rays and crystal structures (which begins ‘It is now two years since Dr. Laue…

A: Bragg's equation gives a selection rule for the allowed and forbidden reflection from a crystal…

Q: 2.) A newly designed superconductor material has 3 different types of atoms in its molecular formula…

A: It is given that 3 different types of atoms (A, B, and C) are present in the molecular formula of a…

Q: Which of the following alloy compositions is an interstitial alloy? (a) Fe0.97Si0.03 (b)…

A: Interstitial alloys form when small atoms insert into the holes of the metal lattice whereas…

Q: Magnitite ( Fe3O4) is a naturally occurring ferrimagnetic  material  with an inverse spinel…

A: Compounds with normal spinel structure are ZnFe2O4, MgAl2O4, CoAl2O4 where A atoms occupy the…

Q: (d) The figure below represents an FCC structure. Determine: i. The relationship between the lattice…

A: Face centred cubic structure can be defined as  the structure in which atoms are present at corners…

Q: Which of the following steps is not part of structure determination by X-ray diffraction? A) Growing…

A: A common method for determining the crystallinity and structure of solid samples is X-ray…

Q: 11) Pyroelectric crystals have the feature: a) Being anisotropic b) Having no inversion center c)…

A: Given,  Pyroelectric crystal have the feature : Options are : a). Being anisotropic b). Having no…

Q: Draw the Perovskite crystal structure in 3 dimensions. Give an example. Describe the neighbors and…

A: The general formula of perovskite is ABX3. A and B are cations whereas X represents anions. The size…

Q: Sketch a tetragonal unit cell, and within that cell indicate locations of the 1 1 1/2 and point…

A:

Crystallography

Crystallography is the category of science that focuses on the atomic and molecular arrangements with their bonding constituting the crystal structure. It is derived experimentally and originated in the year 1912. It is a combination of two words; those are crystal, meaning a cold drop, and graph, meaning writing.