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Q: Amorphous silica, SiO2, has a density of about 2.2 g/cm3,whereas the density of crystalline quartz,…

A: Option (e). Crystalline solids are the one in which atoms are arranged in an orderly repeating…

Q: The ionic bond is (1), the covalent bond is (2), and the metallic bond is (3). (1) = directional,…

A: Covalent bond is formed by overlapping between half filled atomic orbital, which have definite…

Q: 2. Consider the zinc blend (ZnS) crystal structure shown below, 14 a) Show that the minimum…

A: To answer: a) Show that the minimum cation-anion radius ratio is 0.225.   b) Develop a general…

Q: Give suitable reason for the following–(a) Ionic solids are hard and brittle.(b) Copper is malleable…

A:

Q: (a) Differentiate between the crystalline, semi-crystalline and amorphous. (Answer must include…

A: Solids are classified into three categories.  Crystalline, Semi-crystalline and Amorphous.  Crystal…

Q: 1: (a) Find relationship of lattice parameter to atomic radius in a simple cube SC, body centered…

A:

Q: Fe has both bcc and fcc structures with difference lattice constants: the bcc lattice constant a =…

A: Note: Since you have posted a question with multiple sub-parts, we will provide the solution only to…

Q: 1. A cubic solid is made of two elements P and Q. Atoms of P are located at each corner and four (4)…

A: At the corner of the cubic unit cell, there are 8 atoms at all the 8 corners. They are shared…

Q: 1) Shown is a below is unit cell. Answer the following questions based on this unit cell. Sr= black…

A: Strontium Titanate (SrTiO3) represents a notable example of a perovskite oxide compound,…

Q: The smectic liquid crystalline phase can be said to be morehighly ordered than the nematic phase. In…

A: The smectic liquid crystalline phase can be said to be more highly ordered than the nematic because…

Q: Sulfur exhibits two solid phases, rhombic and monoclinic. Use the accompanying phase diagram for…

A: A question based on phase diagram. A phase diagram of one component Sulphur is prescribed based on…

Q: 2. Body-Centered Ualt Cell 聊 (a) (b) Fig 5. Body-Centered Cubic (BCC) Unit Cell. (a) Ball-and-Stick…

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Q: Platinum nanoparticles of diameter ∼2 nm are important catalysts in carbon monoxide oxidation to…

A: Given: Diameter of the nanoparticles=2 nm Edge length=3.924A° To find: The number of platinum atoms

Q: Determine the distance between nearest (110) planes in a simple cubic lattice with a lattice…

A: 1. Given data : Lattice constant a0 = 4. 83 A° Simple cubic lattice (110) planes The distance…

Q: 1) Assume that the elemental atoms are hard spheres of radius r. Calculate the maximum packing rate…

A: simple cubic unitcell

Q: The crystal structure of magnesium oxide, CaS, is similar to rock salt (NaCl). a) What are the…

A: Given: CaS has similar structure to that of NaCl.

Q: The P-T phase diagram of iron (Fe) is shown below, where the -Fe and - Fe phases are in…

A: The objective of this question is to show the plot of Gibbs free energy (G) versus temperature (T)…

Q: What volume of oxygen gas is required to react completely with 0.721 mol of propane (C3H8) according…

A: Solution                                We know that  Balanced equation for combustion of propane:-…

Q: (a) The density of diamond is 3.5 g/cm3, and that ofgraphite is 2.3 g/cm3. Based on the structure of…

A: Sub-part (a): The buckminsterfullerene has the soccer ball structure in which carbon atoms are…

Q: 2) Sodium is a bright and white, soft, wax-like element dissolved in seawater, crystallized in rock…

A: Unit cells are the smallest building blocks of a crystal. There are seven basic unit cells: Cubic,…

Q: Selected chlorides have the following melting points: NaCl(801 °C), MgCl2 (714 °C), PCl3 (-94 °C),…

A: Given compounds: NaCl (801 °C), MgCl2 (714 °C), PCl3 (-94 °C), SCl2 (-121 °C)

Q: onsider a unit cell for the cesium chloride (CsCl) crystal structure; the coordination number is 8…

A: In Cscl , cs+ ions are present at the body center of cubic unit cell and cl- ions are present at the…

Q: Copper crystallizes into a face-centered cubic crystal structure. (a) How many copper atoms are…

A: FCC crystal structure-

Q: Q2// To calculate the surface density of atoms on a particular plane in a crystal. Consider the…

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Crystal Structures

Solids are present all around us. They have different properties and applications. Diamond and graphite are two well-known solids. Diamond is the hardest material in the world and is used in making jewelry. Graphite on the other hand is soft. The lead of your pencil is graphite. Why are they so different in appearance and properties despite the fact they are chemically the same? Both are allotropes of carbon. The answer lies in the structure, the way constituent particles are arranged in the solids.