Concept explainers
(a)
Interpretation:
Whether or not the given sole fact supports the possible identification of the sample as
Concept introduction:
A unit cell of the crystal is the three-dimensional arrangement of the atoms present in the crystal. The unit cell is the smallest and simplest unit of the crystal which on repetition forms an entire crystal. Unit cell can be a cubic unit cell or hexagonal unit cell. The classification of a unit cell depends on the lattice site occupied by the atoms.
(b)
Interpretation:
Whether or not the given sole fact supports the possible identification of the sample as
Concept introduction:
A unit cell of the crystal is the three-dimensional arrangement of the atoms present in the crystal. The unit cell is the smallest and simplest unit of the crystal which on repetition forms an entire crystal. Unit cell can be a cubic unit cell or hexagonal unit cell. The classification of a unit cell depends on the lattice site occupied by the atoms.
(c)
Interpretation:
Whether or not the given sole fact supports the possible identification of the sample as
Concept introduction:
A unit cell of the crystal is the three-dimensional arrangement of the atoms present in the crystal. The unit cell is the smallest and simplest unit of the crystal which on repetition forms an entire crystal. Unit cell can be a cubic unit cell or hexagonal unit cell. The classification of a unit cell depends on the lattice site occupied by the atoms.
(d)
Interpretation:
Whether or not given sole fact supports the possible identification of the sample as
Concept introduction:
A unit cell of the crystal is the three-dimensional arrangement of the atoms present in the crystal. The unit cell is the smallest and simplest unit of the crystal which on repetition forms an entire crystal. Unit cell can be a cubic unit cell or hexagonal unit cell. The classification of a unit cell depends on the lattice site occupied by the atoms.
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Check out a sample textbook solutionChapter 21 Solutions
Student Solutions Manual for Ball's Physical Chemistry, 2nd
- 1) a) A solid substance is considered to be orthorhombic in nature. Since the edges of the unit cell are a = 3.50Å, b = 4.0 Å, c = 5.5 Å, calculate the d and 2θ positions for the 111 plane expected in the diffraction pattern as a result of CuKα radiation (λ = 1.54 Å). b) What is the Miller index of the plane intersecting the crystal axes (2a, 1b, -3c)?arrow_forwardPlease provide step-by-step anwser What is the probable lattice type of crystalline substances that give the following observed reflections? Body centered? Face centered? Etc.? (a) 100, 110, 111, 200, 210 (b) 001, 110, 200, 111, 201arrow_forward(a) Use the Born–Haber cycle, with data from Appendices D and F, to calculate the lattice energy of LiF.(b) Compare the result of part (a) with the Coulomb energy calculated by using an Li-F separation of 2.014 Å in the LiF crystal, which has the rock-saltstructure.arrow_forward
- What is the value of 0 for the first diffraction line (n = 1) in bcc iron (atomic radius 126 pm) when the X-ray wavelength is 58.0 pm? Hint: Consider the closest set of lattice planes.arrow_forwardGiven Cs (262 pm), Tl (171 pm), and B (88 pm) with their noted atomic radii, which atom is most likely to act as an interstitial impurity in an Sn lattice (Sn atomic radius = 141 pm)? Why?arrow_forwardCalculate the energy separations in joules, kilojoules per mole, and electronvolts, and as a wavenumber, between the levels (a) n = 3 and n = 1, (b) n = 7 and n = 6 of an electron in a one-dimensional nanoparticle modelled by a box of length 1.5 nm.arrow_forward
- Would the light from fireflies be considered an example of a fluorescence or a phosphorescence process?arrow_forwardDuring a lunar exploration an unknown crystalline substance is discovered whose external morphology indicates is a cubic material. A diffraction pattern of this material, using radiation of wavelength 0.154 nm, provides the following data: Diffraction Peak, Diffraction Angle, 0 #1 15.64° #2 18.13° #3 26.11° #4 31.06° #5 32.61° #6 38.48° #7 42.7° (a) What structure does this unknown material possess? (b) What is the lattice parameter? (c) What is the atomic radius of the unknown material? (d) What is the element? Crystal Structure“ Atomic Radius (пт) Crystal Structure Atomic Radius (nm) Metal Metal Aluminum FCC 0.1431 Molybdenum ВСС 0.1363 Cadmium НСР 0.1490 Nickel FCC 0.1246 Chromium ВСС 0.1249 Platinum FCC 0.1387 Cobalt НСР 0.1253 Silver FCC 0.1445 Сopper FCC 0.1278 Tantalum ВСС 0.1430 Gold FCC 0.1442 Titanium (a) НСР 0.1445 Iron (a) ВСС 0.1241 Tungsten ВСС 0.1371 Lead FCC 0.1750 Zinc НСР 0.1332arrow_forwardCalculate the number of vacancies per cubic meter in gold (Au) at 900C. The energy for vacancy formation is 0.98 eV/atom. Furthermore, the density and atomic weight for Au are 18.63 g/cm3 (at 900C) and 196.9 g/mol, respectively.arrow_forward
- Physical ChemistryChemistryISBN:9781133958437Author:Ball, David W. (david Warren), BAER, TomasPublisher:Wadsworth Cengage Learning,Principles of Instrumental AnalysisChemistryISBN:9781305577213Author:Douglas A. Skoog, F. James Holler, Stanley R. CrouchPublisher:Cengage Learning