1. (4 pts-2 pts each part) Consider the crystal structures of NaCl, ZnS, and CsCl (notnecessarily shown in this order).a. For one of the three compounds, justify that the unit cell is consistent with stoichiometryof the compound.b. In each of the crystal structures, the cations reside in certain holes in the anions' packingstructures. For each compound, what type of holes are occupied by the cations andexplain why those particular types of holes are preferred.

Answered: Image /qna-images/answer/6e10d629-5142-44a6-bebf-f53b3eba80d3.jpg

Answered: 1. (4 pts-2 pts each part) Consider the…

Chemical Principles in the Laboratory

11th Edition

ISBN:9781305264434

Author:Emil Slowinski, Wayne C. Wolsey, Robert Rossi

Publisher:Emil Slowinski, Wayne C. Wolsey, Robert Rossi

Chapter16: The Structure Of Crystals-an Experiment Using Models

Section: Chapter Questions

Problem 1ASA

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Similar questions

Outline a two-dimensional unit cell for the pattern shown here. If the black squares are labeled A and the white squares are B, what is the simplest formula for a compound based on this pattern?
What is the coordination number of Cs in CsCl? of Na in NaCl? of Zn2 in ZnS?
Materials containing the elements Y, Ba, Cu, and O that are superconductors (electrical resistance equals zero) at temperatures above that of liquid nitrogen were recently discovered. The structures of these materials are based on the perovskite structure. Were they to have the ideal perovskite structure, the superconductor would have the structure shown in pant (a) of the following figure. a. What is the formula of this ideal perovskite material? b. How is this structure related to the perovskite structure shown in Exercise 85? These materials, however, do not act as superconductors unless they are deficient in oxygen. The structure of the actual superconducting phase appears to be that shown in pan (b) of the figure. c. What is the formula of this material?
Like ZnS, lead(II) sulfide, PbS (commonly called galena), has a 1:1 empirical formula with a 2+ cation combined with the sulfide anion. Unit cell of PbS Sample of galena Does PbS have the same solid structure as ZnS? If different, how are they different? How is the unit cell of PbS related to its formula?
G.281.
Applications of lonic Packing and Properties: 1. Spinels (Balas Rubies) The spinel crystal lattice has an empirical formula of A2*B23*O4². The original spinel mineral was identified as containing Al, O, and Mg. Write the empirical formula for this original spinel. Part of the spinel unit cell involves the tetrahedral coordination of a magnesium ion by four oxygen ions. In the empty lattice given below, draw in the Mg and O jons. Magnetic atoms/molecules result from the presence of unpaired electrons. In some minerals with a spinel crystal structure, the Mg ions are replaced by Fe ions of the same charge. Show the electron configurations for the magnesium ion and the iron ion. Explain why the structure containing the Mg cations is non-magnetic while the structure containing the Fe cations is magnetic.
In their book X-rays and crystal structures (which begins ‘It is now two years since Dr. Laue conceived the idea …’) the Braggs give a number of simple examples of X-ray analysis. For instance, they report that the reflection from {100} planes in KCl occurs at 5.38°, but for NaCl it occurs at 6.00° for X-rays of the same wavelength. If the side of the NaCl unit cell is 564 pm, what is the side of the KCl unit cell? The mass densities of KCl and NaCl are 1.99 g cm−3 and 2.17 g cm−3 respectively. Do these values support the X-ray analysis?
2. How to find what a materials crystal structure is? (FCC, BCC or neither FCC or BCC or others) 3. Describe the crystal structure of iron, which crystallizes with two equivalent metal atoms in a cubic unit cell. 4. Silver has a face-centered cubic unit cell. How many atoms of Ag are present in each unit cell?
Please explain briefly.
In an A - B compound of atoms: A atoms are arranged in A3 (h.c.p .) array and B atoms occupy all the octahedral voids and half the tetrahedral voids. | (a) Draw the unit cell and indicate the A and B atoms in this drawing. (Draw the structure.)
Please can you solve this and show every step how you get the answers ??
3.8 An alloy of copper and gold has the structure shown in Fig. 3.75. Calculate the composition of this unit cell. What is the lattice type this structure? Given that 24 carat gold is pure gold, what carat gold does this alloy represent? of Au Cu Fig 3.75 The structure of Cu,Au.

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