A compound with the formula Rb3C60 has been shown to demonstrate superconductivity below 30.0 K. Given that the C60 molecules have a face-centered cubic arrangement, which of the tetrahedral and octahedral sites are occupied by Rb atoms?

Q: 2. How many octahedral and tetrahedral holes are there in CCP and HCP unit cells?

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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: Elemental silver (107.8682 amu) reflects X-rays of wavelength 154.18 pm at angles of 19.076°,…

A: This is a question from solid state chemistry. We have to use following three formulae to figure out…

Q: 5. What is the stacking pattern in the simple cubic lattice structure? aaa, abab, or abcabc?

A: Since you have posted multiple questions as per guidelines we can answer only one per session. If…

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: Define the following:(i) F-centre (ii) p-type semiconductor(iii) Ferrimagnetism.

A: (i) In crystals, there exists some defects one of which is anion vacancy defect, an F-center is…

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: Calcium carbonate crystals in the form of aragonite have orthorhombic unit cells of dimensions…

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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: (2) A hypothetical tetrahedral crystal has the following lattice parameters: a = b = 0.40 nm, c =…

A:

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

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Q: Silver with a density of 10.51g/cm3 forms a face-centered cubic lattice. What is the radius of the…

A: We have to calculate the radius of Ag atom.

Q: What is the coordination number of an atom in a facecentered unit cell?a) 4 b) 6 c) 8 d) 12

A: Coordination number is number of ligands attached to central metal atom.

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

A: Step : 1               Calculate the density.

Q: If you know that the diagonals of the first and second atoms are m 101, and the distance between the…

A: For body centered cubic lattice , atoms are connected along the body diagonal.  thus if redius of 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: What is the difference between a primitive and body centered unit cell?

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Q: A hypothetical tetrahedral crystal has the following lattice parameters: a = b = 0.40 nm, c = 0.5…

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

Q: The compounds Na2O, CdS, and ZrI4 all can be described as cubic closest packed anions with the…

A:

Q: How do you find the coordination number for [Al(OH)4(H2O)2]-?

A: Coordination number is the number of atoms, ions, or molecules that a central atom or ion holds as…

Q: Show how the cesium chloride, sodium chloride, and zinc blende unit cells each contain a…

A: In the cesium chloride unit cell, one chlorine ion is present at each corner of the unit cell. Since…

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

A: Since we have atoms present at corners and face centres of cube in fcc as  1) 8 atoms on each of the…

Q: The ratio of first nearest neighbor distance of .4 the body-centered (bcc) to that of face-…

A:

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

A: There are two types of voids present  a)Tetrahedral  b) Octahedral   CCP stands for cubic close…

Q: Given the copper ion radius = 0.74 Å and the chloride ion radius = 1.81 Å, i. Estimate the edge…

A: From the image It is a unit cell of CuCl. The unit cell has Zinc Blende(ZnS) type structure .In…

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: 1. In a face-centered cubic lattice, an atom laying in a face of a unit cell is shared equally by…

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Q: What is the volume of the unit cell for a body-centered cubic structure for atoms with radius, r? a.…

A:

Q: Determine the density (in g/cm3) of niobium if it forms a body-centered unit cell and has an atomic…

A: The density of unit cell is mathematically expressed as - density = (Z x M)/(NA x a3)      where, Z…

Q: Arrange simple cubic, bcc and fcc lattice in decreasing order of the fraction of the unoccupied…

A: Simple cubic, bcc, and fcc lattice in decreasing order of the fraction of the unoccupied space are…

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

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Q: 2- Sketch the following planes and directions within a cubic unit cell: a. [101] b. (011)

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Q: Describe the caesium-chloride and rock-salt structures. How does the radius-ratio rule help in the…

A: The below is the structure of cesium chloride.

Q: Calculate the density of niobium if it occupies a body-centered cubic unit cell with an atomic…

A:

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: A certain compound, whose density is 4.56 g/cm³, crystallizes in the tetragonal system with unit…

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Q: Estimate at what temperature silicon tends to be as electrically conductive as diamond at room…

A: The solution is provided in the image below.

Q: Make a table for comparison between the interior angles of the seven (7) unit cells and…

A: Comparing all of the unit cells and we see that

Q: Calculate the number of atoms/cm2 on the plane (100) of lead (FCC) for which the size of the unit…

A: Planar density: It is defined as the number of atoms divided by unit area of crystallographic plane.…

Q: What is the formula of a compound in which the element Y forms ccp lattice and atoms of X occupy…

A: The given compound is made up of X and Y. Y forms ccp lattice. This shows that the number of atoms…

Q: Use the ionic radii of 77 pm for Fe2+ and 140 pm for O2– to demonstrate which type of interstitial…

A: Given data, Radius of Fe2+ = 77pm Radius of O2- = 140pm

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: A hypothetical tetrahedral crystal has the following lattice parameters: a = b = 0.40 nm, c = 0.5…

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

Q: Which of the three-dimensional primitive lattices hasa unit cell where none of the internal angles…

A: Please find below the angles and sides of different types of primitive lattices

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.