The orthorhombic unit cell of NiSO4 has the dimensions a = 634 pm, b = 784 pm, and c = 516 pm, and the mass density of the solid is estimated as 3.9 g cm−3. Identify the number of formula units in a unit cell and calculate a more precise value of the mass density.

Q: Calculate the density of cesium if it crystallizes in the bcc structure with an atomic radius of 272…

A:

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Q: How many Mn4 + and O2- ions are in the unit cell of the rutile MnO2?

A: The rutile structure for MnO2 can be given as follows:

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A:

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A: For orthorhombic system, So that, Where, dkhl=spacing of planes.

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A:

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A:

Q: ng of the (321) pla ation is used (X=1 ction?

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Q: ii) Prove that the volume of an FCC unit cell, VC is; ?? = 16?3√2

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A:

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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.