100 10 3 IbIII := IbIII UbIII = 36 × 10 3 UbIII 3 36 × 10 3 Sb 6 100 10 3 IbIV := IbIV IbIV = 3.654 × 10 3 UbIV 3 15.8 × 10 3 Sb 6 100 10 3 IbV := IbV IbV = 3.849 × 10