Question 7 of 146

Lithium borohydride (LiBH4), crystallises in an orthorhombic system with 4 molecules per unit cell. The unit cell dimensions are:- a = 6.81 Å , b = 4.43 Å ,c = 717 Å. If the molar mass of LiBH4 is
21.76 g mol-1.The density of the crystal is:-

(A) 0.668 gcm-3
(B) 0.585 gcm2
(C) 1.23 gcm-3

(D) None of these