To determine its packing efficiency, we should be considering a cube having the edge length of a, the cube diagonal as c, and the face diagonal length as b. Free shipping for many products! They have two options for doing so: cubic close packing (CCP) and hexagonal close packing (HCP). space (void space) i.e. In the same way, the relation between the radius r and edge length of unit cell a is r = 2a and the number of atoms is 6 in the HCP lattice. Anions and cations have similar sizes. Calculate Packing Efficiency of Simple Cubic Unit Cell (0.52) cation sublattice. Brief and concise. Packing efficiency = Volume occupied by 6 spheres 100 / Total volume of unit cells. { "1.01:_The_Unit_Cell" : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()" }, { "6.2A:_Cubic_and_Hexagonal_Closed_Packing" : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", "6.2B:_The_Unit_Cell_of_HPC_and_CCP" : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", "6.2C:_Interstitial_Holes_in_HCP_and_CCP" : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()", "6.2D:_Non-closed_Packing-_Simple_Cubic_and_Body_Centered_Cubic" : "property get [Map MindTouch.Deki.Logic.ExtensionProcessorQueryProvider+<>c__DisplayClass228_0.b__1]()" }, [ "article:topic", "showtoc:no", "license:ccbyncsa", "licenseversion:40" ], https://chem.libretexts.org/@app/auth/3/login?returnto=https%3A%2F%2Fchem.libretexts.org%2FBookshelves%2FInorganic_Chemistry%2FMap%253A_Inorganic_Chemistry_(Housecroft)%2F06%253A_Structures_and_Energetics_of_Metallic_and_Ionic_solids%2F6.02%253A_Packing_of_Spheres%2F6.2B%253A_The_Unit_Cell_of_HPC_and_CCP%2F1.01%253A_The_Unit_Cell, \( \newcommand{\vecs}[1]{\overset { \scriptstyle \rightharpoonup} {\mathbf{#1}}}\) \( \newcommand{\vecd}[1]{\overset{-\!-\!\rightharpoonup}{\vphantom{a}\smash{#1}}} \)\(\newcommand{\id}{\mathrm{id}}\) \( \newcommand{\Span}{\mathrm{span}}\) \( \newcommand{\kernel}{\mathrm{null}\,}\) \( \newcommand{\range}{\mathrm{range}\,}\) \( \newcommand{\RealPart}{\mathrm{Re}}\) \( \newcommand{\ImaginaryPart}{\mathrm{Im}}\) \( \newcommand{\Argument}{\mathrm{Arg}}\) \( \newcommand{\norm}[1]{\| #1 \|}\) \( \newcommand{\inner}[2]{\langle #1, #2 \rangle}\) \( \newcommand{\Span}{\mathrm{span}}\) \(\newcommand{\id}{\mathrm{id}}\) \( \newcommand{\Span}{\mathrm{span}}\) \( \newcommand{\kernel}{\mathrm{null}\,}\) \( \newcommand{\range}{\mathrm{range}\,}\) \( \newcommand{\RealPart}{\mathrm{Re}}\) \( \newcommand{\ImaginaryPart}{\mathrm{Im}}\) \( \newcommand{\Argument}{\mathrm{Arg}}\) \( \newcommand{\norm}[1]{\| #1 \|}\) \( \newcommand{\inner}[2]{\langle #1, #2 \rangle}\) \( \newcommand{\Span}{\mathrm{span}}\)\(\newcommand{\AA}{\unicode[.8,0]{x212B}}\), http://en.Wikipedia.org/wiki/File:Lample_cubic.svg, http://en.Wikipedia.org/wiki/File:Laered_cubic.svg, http://upload.wikimedia.org/wikipediCl_crystal.png, status page at https://status.libretexts.org.
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