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Mechanical Properties Of Fluids

Question
CBSEENPH11020779

For a cubic structure which one of the following relations indicating the cell characteristic is correct?

  • straight a not equal to straight b not equal to straight c space and space space straight alpha space not equal to straight beta space and space straight gamma space space 90 to the power of straight o
  • straight a not equal to straight b not equal to straight c space and space space straight alpha space equals space straight beta space equals straight gamma space equals space 90 to the power of straight o
  • straight a equals straight b equals straight c space and space space straight alpha space not equal to straight beta space not equal to straight gamma space not equal to space 90 to the power of straight o
  • straight a equals straight b equals straight c space and space space straight alpha space equals straight beta space equals straight gamma space equals space 90 to the power of straight o

Solution

D.

straight a equals straight b equals straight c space and space space straight alpha space equals straight beta space equals straight gamma space equals space 90 to the power of straight o

In cubic crystal, the crystal axes are perpendicular to one another (α= β =γ=90) and the repetitive interval is the same along the three axes (a= b=c).