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Unformatted text preview: decreases as the values of h , k , and l increase. As values of the planar indices increase, the magnitude of the denominator in Equation 3.14 increases, with the result that the interplanar spacing ( d hkl ) decreases. 72 Concept Check 3.3 Question: Do noncrystalline materials display the phenomenon of allotropy (or polymorphism)? Why or why not? Answer: Noncrystalline materials do not display the phenomenon of allotropy; since a noncrystalline material does not have a defined crystal structure, it cannot have more than one crystal structure, which is the definition of allotropy....
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- Fall '07
- Crystallography, Crystal, Crystal system, Atomic packing factor, ans wer