Perovskite, an oxide mineral, is shown below. The light gray spheres are oxygen anions in edge positions. The dark spheres are calcium cations in corner positions. The small sphere in the body is a titanium cation.   1.  What type of unit cell do the calcium ions define? 2.  What is the empirical formula of the ionic compound formed by calcium, titanium, and oxygen? 3. If the edge length of the unit cell is 3.84Å, what is the density of perovskite (g/cm3)?

Q: The below image is an example of what type of unit cell?

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Q: The density of solid Fe is 7.87 g/cm³. How many atoms are present per cubic centimeter (cm³) of Fe?…

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Q: How would I be able to answer this?

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A: In FCC : Number of total atoms in a unit cell =4  Number of atoms at corners = 8  ( contribute each…

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

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Q: 5. The space-filling representation provided below is an example of a unit cell, which contains…

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Q: What is a crystalline lattice? How is the lattice represented with the unit cell?

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Q: Consider the body-centered cubic unit cell shown in this image. How many corner atoms are shown in…

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A: Answer: the edge length of the unit cell is 290 pm.

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Q: Determine the radius of a polonium atom.(b) Determine the density of alpha polonium.

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A:

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.