The expression for the triple vector product solid harmonic

Abstract

The solid harmonic yLM[(r1Λr2)Λr3] was expressed in terms of the spherical harmonics YL1M1(r̂1), YL2M2(r̂2), and YL3M3(r̂3), where the coefficients of the expansion were expressed in terms of 9j symbols. Here we present a simpler form of those coefficients expressed in terms of 6j symbols.