Note that even though the derivation of Eq. ( ) assumed non-degenerate principal moments I FG,I,q , the final result does not depend on I FG,I,q . Thus, the limit as different principal moments approach degeneracy is well-defined and Eq. ( ) is valid for both uniaxial and biaxial CG particles. Noting that the only factor in the integral in Eq. ( ) that depends on Ω I,q is δ(M M M ΩI (r n ) -Ω I ) and that Ω I,q does not depend on r n , and using the definition of Z(R N , Ω N ) in Eq. ( ), Eq. ( ) reduces to