The mineral spinel (MgAl2O4) has a density of 3.55 gcm-3 . If the unit cell edge of spinel is 644 pm, how many formula units are in a unit cell?

Q: Write a comparison between : 1- Metal with ceramic 2- Metal with polymer 3- Metal with nanomaterial

A: The differences are as follows:

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

A: Edges of unit cell: a = 3.50 A b = 4.0 A c = 5.5 A Miller indices of plane for which diffraction is…

Q: Calculate the maximum wavelength of radiation required to excite electrons between the valence and…

A: The band gap represents the energy required for electronic transitions, Energy of photon is 2.26 eV.…

Q: The unit cell of the tetragonal (a = b not equal to c) phase of a Ni and Nb alloy is given below. a.…

A: Given a tetragonal unit cell where a=b but not equal to c . Let's discuss the mirror planes and…

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: On increasing the temperature, the increase in conductivity of intrinsic semiconduc (A) Decrease in…

A: The internisic semiconductors are the pure semiconductors.

Q: A20g_sample of a n0nreactiveMetal is placed in flask c0ntaining 12mL 0f water; the final v0l 0f…

A: Given: mass of sample = 20 g Initial volume of water = 12 mL Final volume of water = 13.67 mL edge…

Q: 7. It is not possible to pack spheres together without leaving some void spaces between the spheres.…

A: 8) The solution builds there one thing dissolves by another. A soluble substance is called a solute.…

Q: (non-ferromagnesian) silicates with the dark (ferromagnesian) silicates and list three minerals…

A: Silicates can be generally divided into  two  light and dark silicates. the dark silicates are also…

Q: Explain why does conductivity of germanium crystals increase on doping with galium.

A: Gallium is a trivalent element while germanium is tetravalent

Q: Hydrofluoric acid etches glass by reacting with the silica in it according to the following…

A:

Q: Atomic Density Calculate the density of body-centered cubic iron and compare it to the density of…

A: # Calculation for the density of BCC iron: For BCC iron, lattice parameter, a = 0.287 nm

Q: Q2) a-What is the role of the repeat unit in the conduction of polymers? b-Explain Matthiessen's…

A: Following are the appropriate answers of the given questions.

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

A: Following are the repeating pattern of close packed that generates close packed lattice.

Q: 5. Calculate the conductance and the conductivity of a metal if the resistivity of the metal is…

A:

Q: An element occurs in bcc structure. It has a cell edge length of250 pm. Calculate the molar mass if…

A: Given: Edge length, a = 250 pm = 250*10-10 cm Density = 8 g cm-3 For bcc cell, number of atoms, Z =…

Q: 0.58 oA x-ray wavelength is used to calculate the d200 distance of nickel. The diffraction angle ɵ…

A: This question is given from solid state, so as given data given Wavelength , interplanar distance ,…

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: Silicate [SiO4] 4- and Phosphate [PO4]3- anions seem to be quite similar when briefly viewed.…

A: The mineral may be defined as any naturally occurring inorganic solid that has a definite chemical…

Q: Using what you know about conductors and insulators, explain why common electrical wire is…

A: Insulators are substances that do not allow current to pass through it whereas conductors are…

Q: a cell is roughly spherical with a radius of 25.6 X 10^-6. The surface tension of water is 71.99 mN…

A: Work involve= surface tension × change in surface area

Q: Given that the wavelength of The copper Ka1 and Ka2 are 1.54056 Å and1.54439 Å respectively,…

A: The above mentioned problem will be solved using Bragg's Law. Bragg's law suggests a relationship…

Q: h) Why did the steelworkers introduce the carbon into the metal? What role does it play and how does…

A: Since you have posted a question with multiple sub-parts, we will solve first three sub-parts for…

Q: 1. Derive the coordination number and atomic packing factor of BCC. 2. Compute the density of lead…

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

Q: Calculate the number of Frenkel defects per cubic meter in Al2O3 if the energy required to create a…

A: Please find your solution below :

Q: A silicon sample maintained at 300 K is characterized by the energy band diagram in Rg.4-48:…

A: a. Yes the eqilibrium conditions previl because of the fermi level is contant with position.

Q: Calculate the linear density of the [110] direction of a BCC unit cell Calculate the planar density…

A: The answer for first question is given below. Kindly repost the other question as separate one

Q: Type of silicate mineral Anion Formula Do not include OH- Anion Charge  (If it is 0 then make…

A: A silicate is any member of a family of anions consisting of silicon and oxygen, usually with the…

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

A:

Q: How is electrolytic conductance measured experimentally?

A: Given term,      Electrolytic conductance

Q: The d321 interplanar spacing in a BCC metal is 0.084165 mm A) Draw the crystalline plane B) How…

A:

Q: What is the role of methanol in the deposition of thin films of semiconductor materials via Aerosol…

A:

Q: The compound shown has a perovskite structure, where: Ba (vertices); Ti (Center of the cell); O (the…

A:

Q: 1. Show that the atomic packing factor for HCP is 0.74

A: The atomic packing factor can be calculated by using the formula Atomic packing fraction=Volume of…

Q: 6. The following first-order reflections are observed for cubic crystals of copper when 1. = 139.2…

A:

Q: The d321 interplanar spacing in a BCC metal is 0.084165 mm a) What is the constant of the network?…

A: Since you have posted a question with multiple sub-parts, we will solve first three sub-parts for…

Q: An element with density 6.8 g cm-³, occurs in bcc structure with cell edge length equal to 290 pm.…

A: The expression for density (d) is given below: For BCC,  n = 2a = 290 pm = 290 × 10−10 cmd = 6.8 g…

Q: The unit cell of nickel arsenide is shown here. (a) What typeof lattice does this crystal possess?…

A: Part a) From top view and side view it is clear that: i) top two edges are equal in length. but are…

Q: A crystal of FeO was found to have a unit cell dimension of 4.501Å, a measured density of 5.828…

A: Solution :      We can determine the defect in the sample of non-stoichiometric compounds. This can…

Q: How can the conductivity of semi-conductors be controlled?

A: The conductivity of semiconductors may easily be modified by introducing impurities into their…

Q: Danial is conducting an experiment to evaluate the hardenability of low alloy steel, 4340.

A: This is a multipart question . According to Guidelaine, in multipart question, we can only solve the…

Q: HEY MAY YOU PLEASE WITH THESE QUESTIONS 1) What would happen if two metals with difference in…

A: 1) Answer - According to the question - Given -  if two metals with difference in atomic radii…

Q: Why are resistors important in an electrical circuit? ) Resistors only allow a current to flow in…

A: The flow of electron leads to the formations of current .If any thing which tends to decrease the…

Q: ) The figure above shows a gold surface with Ar and He atoms adsorbed. The large grey spheres…

A: The diagram shows that gold surface is present as cubic close packing.  The unit cell show Ar atoms…

Q: 9.) Which of the following statements is correct? a) The carrier concentrations increase with…

A: Semiconductors are materials whose electrical property lies between an insulator and a conductor.…

Q: Epitaxial growth is a single crystal growth on the polycrystalline silicon silicon dioxide silicon…

A: Epitaxial growth is overgrowth of film material

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.