13 The free gas-phase ion V3+ has a ³F ground term. The 'D and 3P terms lie Tespectively 10642 cm¹ and 12920 cm above it. The energies of the terms are given in terms of racah parameters as E(F) = A - 8B, E(3P) = A + 7B, E('D) = A - 3B+2C. Calculate the values of B and C for V3+.