Table 1 Concentrations and isotopic ratios of He and Ne of investigated Washington County samples.

From: Solar noble gases in an iron meteorite indicate terrestrial mantle signatures derive from Earth’s core

Sample Weight (mg) 4He 4He/3He 22Ne 20Ne/22Ne 21Ne/22Ne
[10−8 cm3 STP g−1] [10−10 cm3 STP g−1]
WC_2a 17.3 1368.0 (18.7) 10.92 (16) 236.49 (39) 1.50 (1) 0.898 (4)
WC_5a 18.3 1396.8 (32.8) 10.55 (43) 219.95 (66) 1.88 (2) 0.859 (4)
WC_11a 14.2 1164.4 (12.6) 8.40 (9) 243.28 (53) 1.20 (1) 0.926 (5)
WC_14a 20.9 544.3 (7.5) 4.48 (6) 297.21 (1.08) 1.54 (1) 0.879 (6)
WC_gb 22.4 1054.3 (38.7) 6.55 (5) 253.34 (9.34) 1.30 (2) 0.910 (7)
WC_sb 21.87 2214.0 (78.6) 16.19 (16) 266.36 (9.52) 2.34 (2) 0.831 (7)
WC_rb (schreibersite*) 8.54 2390.5 (84.1) 8.25 (10) 459.65 (12.98) 1.38 (2) 0.917 (9)
  1. *WC_r is a residue of almost pure schreibersite particles with sizes of 3–5 µm, which were obtained by dissolution of 1.03 g original material in sulfuric acid. Uncertainties (1σ) in the last digits are given within parentheses.
  2. aMeasurements performed at the Institut für Geowissenschaften, Heidelberg.
  3. bMeasurements performed at MPI für Chemie, Mainz.