Following figure shows an FCC unit cell with atoms of radius r market 1(corner), 2(face centre), 3(face centre). A quadrilateral is also shown by joining the centers of 4 face centered atoms. Find : (i) The distances between atoms 1& 2, 2 &3, and 1 &3 (ii) The shape and dimensions of the quadrilateral

Following figure shows an FCC unit cell with atoms of radius r market

1.	Following figure shows an FCC unit cell with atoms of radius r market 1(corner), 2(face centre), 3(face centre). A quadrilateral is also shown by joining the centers of 4 face centered atoms. Find : (i) The distances between atoms 1& 2, 2 &3, and 1 &3 (ii) The shape and dimensions of the quadrilateral
Answer» Answer :(i) 2R, 2r, `2SQRT3 R`; (II) square, SIDE = 2r