The difference between the fcc and hcp is the stacking sequence. What is the radius of the platinum atom? See, for instance databases - WebElements is the simplest, and search for platinum. 3. The lattice parameter is 0.392 nm. Question: Platinum has a face-centered cubic crystal structure and a density of {eq}\rm 21.5\ g/cm^3 {/eq}. The atomic radius of platinum is 0.1387 nm. So, ... 1 3) set of planes for FCC platinum when monochromatic radiation of wavelength 0.1542 nm is used. Platinum adopts a face centred cubic crystal structure. This is also known as a cubic close packed structure. Face Centered Cubic Structure [10 pts] Platinum is an example of a metal with the face centered cubic (FCC) structure. Pt is bonded to twelve equivalent Pt atoms to form a mixture of edge, face, and corner-sharing PtPt12 cuboctahedra. At room temperature the metal has the fcc crystal structure with a basis of one platinum atom per lattice site. Metals with the fcc structure include aluminum, copper, nickel, gamma iron, gold, and silver. In order to determine whether Rh has an FCC or a BCC crystal structure, we need to compute its density for each of the crystal structures. Pt is Copper structured and crystallizes in the cubic Fm-3m space group. FCC and HCP Structure. There are three main varieties of these crystals: Primitive cubic (abbreviated cP and alternatively called simple cubic); Body-centered cubic (abbreviated cI or bcc) Barium crystallizes in a body-centered cubic unit cell with an edge length of 5.025 Å (a) What is the atomic radius of barium in this structure? In metallurgy: Metallic crystal structures …of each face (known as face-centred cubic, or fcc). (a) TRUE/FALSE: The ONLY close packed crystal structures for elemental metals are the hexagonal close packed and face centered cubic crystal structures. face-centered cubic (FCC) solid crystalline structure consisting of a cubic unit cell with lattice points on the corners and in the center of each face face-centered cubic unit cell simplest repeating unit of a face-centered cubic crystal; it is a cube containing lattice points at each corner and in the center of each face Platinum: Wyckoff R W G : Crystal Structures 1 (1963) 7-83: Second edition. All Pt–Pt bond lengths are 2.81 Å. In Homework 2, you calculated the lattice parameter to be a = 3.92 Å. In crystallography, the cubic (or isometric) crystal system is a crystal system where the unit cell is in the shape of a cube.This is one of the most common and simplest shapes found in crystals and minerals.. Examples of metals with the hcp type of structure are magnesium, cadmium, zinc, and alpha titanium. Calculate the density of a platinum in g\cm^3. The structure is three-dimensional. Answer posted December 2004 Calculate the radius of a platinum atom in cm, given that Pt has an FCC crystal structure, a density of 21.4 g/cm3, and an atomic weight of 195.08 g/mol. Source(s): platinum crystallizes face centered cubic unit cell radius platinum atom 139pm: 0 0 Platinum (atomic radius = 1.38 Å) crystallizes in a cubic closely packed structure. Answer. The face centered cubic and hexagonal close packed structures both have a packing factor of 0.74, consist of closely packed planes of atoms, and have a coordination number of 12. First, we will assume that Rh has an FCC structure. Read More The electronic configuration of platinum is: (Xe)(4f) 14 (5d) 9 (6s) 1, and it has an atomic radius of 0.139 nm. Platinum has a Young's modulus of 172 GPa, a UTS of 140 MPa, and a fracture strain of 0.4. Calculate the edge length of the face-centered cubic unit cell and the density of platinum.

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