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Debanjana adhikari Asked a Question
May 19, 2020 10:37 ampts 30 pts
  • CSIR NET
  • Physical Sciences

A narrow beam of x-rays with wavelength 1.5 a is reflected from an ionic crystal with an fcc lattice structure with a density of 3.32 gem". the molecular weight

A narrow beam of X-rays with wavelength 1.5 A is reflected from an ionic crystal with an fcc lattice structure with a density of 3.32 gem". The molecular weight is 108 AMUJ (1AMU = 1.66 x 10 g) A. The lattice constant is (a) 6.00 Å (b) 4.56 Å (c) 4.00 Å (d) 2.56 Å
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  • Ruby negi
    Neff is 4 for fcc, 2 for bcc,1 for simple cubic. it is different for different unit cel... option a is correct using density formula..
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  • Chandra dhawan thankyou
    see attached file it's very helpful for you
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  • Dhairya sharma
    see attached. fcc has four no of atom in a basis
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  • Abhishek singh thankyou
    I have attached the Solution. Do ask doubts if any. Best regards.
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    Abhishek singh
    FCC has effectively 4 atoms