Concept explainers
(a)
Interpretation:
Whether the statement that cesium chloride has chloride ions at corners and cesium ion at body center thus has body-centered unit cell is true or false has to be determined.
Concept Introduction:
Unit cell represents lattice structure if it stacked together repeatedly with no gaps and rotations. This can also produce whole crystals by stacking method. Basic type of unit cells is as follows:
1. Simple cubic (SC).
2. Body centered cubic (BCC).
3. Face centered cubic (FCC).
(b)
Interpretation:
Whether the statement that density of unit cell must be same as density of material is true or false has to be determined.
Concept Introduction:
Refer to part (a).
(c)
Interpretation:
Whether the statement that when x-rays are passed through a single crystal of a compound, the x-ray beam will be diffracted because it interacts with the electrons in the atoms of the crystal is true or false has to be determined.
Concept Introduction:
Refer to part (a).
(d)
Interpretation:
Whether the statement that all the angles of a unit cell must be equal to
Concept Introduction:
Refer to part (a).
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Chapter 3 Solutions
ACHIEVE/CHEMICAL PRINCIPLES ACCESS 1TERM
- Palladium has a cubic crystal structure in which the edge of the unit cell is 389 pm long. If the density of palladium is 12.02 g/cm3, how many palladium atoms are in a unit cell? In which of the cubic unit cells does palladium crystallize?arrow_forwardThe unit cell of silicon carbide, SiC, is illustrated below. (a) In what type of unit cell are the (dark gray) C atoms arranged? (b) If one edge of the silicon carbide unit cell is 436.0 pm, what is the calculated density of this compound? A portion of the solid-state structure of silicon carbide.arrow_forwardIf an ionic solid has an fcc lattice of anions (X) and all of the tetrahedral holes are occupied by metal cations (M), is the formula of the compound MX, MX2, or M2X?arrow_forward
- What is the coordination number of Cs in CsCl? of Na in NaCl? of Zn2 in ZnS?arrow_forwardThe coordination number of uniformly sized spheres in a cubic closest-packing (FCC) array is 12. Give the coordination number of each atom in (a) a simple cubic lattice. (b) a body-centered cubic lattice.arrow_forwardThe unit cell of a compound containing potassium, aluminum,and fluorine is shown here. (a) What type of latticedoes this crystal possess (all three lattice vectors are mutuallyperpendicular)? (b) What is the empirical formula?arrow_forward
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