TABLE 3: ELEMENTAL ABUNDANCES IN CI-CHONDRITES see K. Lodders 2003, ApJ 591, 1220-1247 for description NOTE: ppm by mass = microgram/gram. (a) N = number of analyses included in mean. (b) Nmet = number of meteorites included in weighted group mean. Elemental abundances given in ( ) are excluded in the group mean. (c) Oxygen abundance by difference to 100% Alais Ivuna Orgueil Revelstoke Tonk CI-Chondrite Group Mean ±1sigma N(a) Mean±1sigma N(a) Mean±1sigma N(a) Mean N(a) Mean±sigma Na Weighted Mean±1sigma Nmet(b) H 21800 1 20900 1 19730±2270 3 24200 1 21015±1770 4 He 9.17×10-3 9.17×10-3 see §2.3.1.5 Li 1.52 1 1.45±0.21 6 1.46±0.03 2 Be (0.019) (1) 0.0252±0.005 see §2.3.2.1 B 0.650±0.028 2 0.775±0.007 2 0.713±0.072 2, §2.3.2.2 C 29450±3465 2 44300±5660 2 34800±4585 9 40000 1 27000 1 35180±4810 5 N 2900 1 2948±535 5 2940±20 2 O (47170) c 454130 c 462250 c (413400) c (488700) c 458200±5750 2 F 66.5±4.9 2 58.2±9.3 5 60.6±4.1 2 Ne 1.80×10-4 1.80×10-4 see §2.3.1.5 Na 5060±316 4 5070±390 3 4990±380 20 (5660) (1) 5010±33 3 Mg 94170±3260 3 97100±655 3 95950±4400 17 (120000) (1) (82700) (1) 95870±780 3 Al 8230±275 5 8475±210 6 8580±480 18 (2200) (1) (10200) (1) 8500±130 3 Si (97100) (1) 108300±3200 5 105700±2800 11 (130000) (1) (104700) (1) 106500±1250 2 P (1200) (1) (760) (1) 924±100 8 (480) (1) 920±100 1 S 64600 1 50820±5050 3 53500±2530 7 54000 1 58000 1 54100±3650 5 Cl 724±37 2 700±110 9 (510) (1) 704±10 2 Ar 1.33×10-3 1.33×10-3 see §2.3.1.5 K 524±57 2 475±18 3 543±35 17 (800) (1) 510 1 530±24 4 Ca 9030±380 3 (9700) (1) 9076±656 14 (11000) (1) 9050±780 2 9070±20 3 Sc 5.79±0.23 2 5.74±0.48 3 5.84±0.49 13 6 1 5.83±0.06 4 Ti 450 1 440±28 2 439±30 15 (1000) (1) (540) (1) 440±3 3 V 52.5±3.5 2 58.0 1 56.0±3.7 13 55.7±1.3 3 Cr 2470±320 3 2460±149 3 2630±150 16 (3200) (1) 2690 1 2590±80 4 Mn 1940±150 4 1823±84 4 1920±100 16 (2500) (1) (1400) (1) 1910±40 3 Fe 178200±720 3 182500±12300 7 183470±7900 24 (220000) (1) 182150±1910 2 182800±1470 4 Co 518±25 4 468±31 5 507±24 19 (330) (1) 502±17 3 Ni 10100±252 5 10910±600 7 10670±640 33 (600) (1) (770±35) (2) 10640±210 3 Cu 130 1 118±16 5 131±21 11 (13000) (1) 130 1 127±6 4 Zn 301±6 4 293±26 10 318±26 30 280 1 310±12 4 Ga 9.60 2 8.87±1.34 3 9.57±0.68 15 10.3 1 9.51±0.31 4 Ge 33.9±3.7 4 33.1±2.0 6 33.1±2.7 18 33.2±0.3 3 As 1.82±0.04 2 1.77±0.21 3 1.70±0.23 16 1.95 1 1.73±0.06 4 Se 20.5±0.9 4 20.0±1.1 8 19.5±1.9 26 21 1 19.7±0.4 4 Br 2.35±0.08 3 4.82±0.75 6 3.18±0.56 21 (9) (1) 3.43±0.75 3 Kr 5.22×10-5 5.22×10-5 see §2.3.1.5 Rb (1.55±0.04) (2) 2.16±0.32 15 2.12±0.31 30 (<4) (1) 2.13±0.02 2 Sr 7.89±0.75 7 7.67±0.56 16 7.74±0.10 2 Y 1.35±0.14 4 1.60±0.14 10 1.53±0.12 2 Zr 3.77±0.22 4 4.02±0.23 12 3.96±0.11 2 Nb 0.30 1 0.259±0.015 6 0.265±0.016 2 Mo 1.12±0.08 3 0.929±0.036 3 1.02±0.11 2 Ru 0.662 1 0.633±0.124 4 0.725±0.032 8 (0.94) (1) 0.692±0.044 3 Rh 0.142±0.002 2 0.139±0.002 2 0.141±0.002 2 Pd 0.557 1 0.557±0.027 6 0.600±0.034 17 0.588±0.020 3 Ag 0.204 1 0.194±0.031 5 0.203±0.018 16 0.201±0.004 3 Cd 0.657±0.042 3 0.683±0.031 6 0.675±0.046 25 0.675±0.006 3 In 0.0838±0.006 2 0.080±0.006 4 0.0779±0.0043 17 0.0788±0.002 3 Sn 1.80 1 1.72±0.11 3 1.663±0.160 12 1.68±0.04 3 Sb 0.181±0.01 3 0.158±0.029 7 0.148±0.026 29 (0.12) (1) 0.152±0.009 3 Te 2.89±0.29 2 2.34±0.22 4 2.26±0.17 17 2.33±0.18 3 I (1.12±0.51) (4) 0.48±0.16 6 0.48±0.16 1 Xe 1.74×10-4 1.74×10-4 see §2.3.1.5 Cs 0.181±0.011 2 0.187±0.012 10 0.184±0.012 17 0.185±0.002 3 Ba 2.36 1 2.30±0.14 5 2.31±0.03 2 La 0.218±0.007 2 0.211±0.029 2 0.238±0.020 14 0.22 1 0.232±0.010 4 Ce 0.579 1 0.602±0.014 3 0.637±0.025 6 0.621±0.022 3 Pr 0.0935±0.0050 2 0.0925±0.0059 4 0.0928±0.0005 2 Nd 0.489 1 0.447±0.037 5 0.459±0.021 9 0.457±0.011 3 Sm 0.148±0.004 2 0.143±0.008 3 0.145±0.015 17 0.15 1 0.145±0.002 4 Eu 0.0556±0.0020 3 0.0528±0.0038 3 0.0548±0.0044 15 0.053 1 0.0546±0.0010 4 Gd 0.187±0.010 2 0.201±0.011 8 0.198±0.006 2 Tb 0.0369 1 0.0310 1 0.0372±0.0026 2 0.0356±0.0031 3 Dy 0.235±0.006 2 0.239±0.021 9 (0.2) (1) 0.238±0.002 2 Ho 0.0580 2 0.0555±0.0023 5 0.0562±0.0012 2 Er 0.152±0.005 3 0.167±0.012 6 0.162±0.008 2 Tm 0.0220 1 0.0245±0.0035 2 0.0237±0.0014 2 Yb 0.166±0.019 3 0.152±0.026 4 0.165±0.013 15 0.16 1 0.163±0.005 4 Lu 0.0240±0.0018 2 0.0240 2 0.0235±0.0030 11 0.024 1 0.0237±0.0002 4 Hf 0.10 1 0.116±0.010 7 0.12 1 0.115±0.006 3 Ta 0.0143 1 0.0145±0.0010 2 0.0144±0.0001 2 W 0.089±0.007 5 0.089±0.007 1 Re 0.0333±0.0026 2 0.0350±0.0017 3 0.0379±0.0035 18 (0.055) (1) 0.037±0.002 3 Os 0.469±0.027 3 0.491±0.010 2 0.487±0.033 20 0.5 1 0.486±0.007 4 Ir 0.458±0.026 4 0.481±0.029 4 0.470±0.029 31 0.46 1 0.470±0.005 4 Pt (0.6) (1) 1.095±0.055 6 0.962±0.075 13 (1.2) (1) 1.004±0.064 2 Au (0.103±0.01) (5) 0.148±0.021 8 0.145±0.015 29 0.146±0.002 2 Hg 0.293±0.106 3 0.345±0.191 2 0.314±0.029 2, see §2.3.6 Tl 0.140±0.006 2 0.140±0.012 3 0.144±0.011 13 0.143±0.002 3 Pb 2.52±0.18 3 2.584±0.257 4 2.56±0.03 2 Bi (0.166±0.031) (2) 0.114±0.007 6 0.108±0.009 13 0.110±0.003 2 Th 0.0387±0.0016 2 0.0286±0.0011 8 0.0312±0.0021 7 0.0313±0.0004 2 0.0309±0.003 4 U 0.0095±0.0006 3 0.0080±0.0005 8 0.0081±0.0004 14 0.0107±0.0012 2 0.0084±0.008 4