[en] A new value for the CO2-H2O oxygen isotope fractionation factor of 1.04145 +/- 0.000 15 (2σ) has been determined. The data have been normalized to the V-SMOW/V-SLAP scale and were obtained by measuring isotopic compositions with the guanidine hydrochloride and chlorine trifluoride techniques
Journal
[en] Chlorine trifluoride (ClF3) is recommended as a comparable alternative to bromine pentafluoride (BrF5) for the quantitative extraction of oxygen from silicate minerals. (author)
Journal
Geochimica et Cosmochimica Acta; ISSN 0016-7037; 
; v. 46(9); p. 1665-1668
; v. 46(9); p. 1665-1668
[en] High and variable deuterium enrichments in two of the most unequilibrated (unmetamorphosed) type LL3 ordinary chondrites, Bishunpur and Semarkona, are reported. Water released from bulk unseparated material by pyrolysis had deltaD values up to approximately 3,000 0/00, or in absolute terms a D/H ratio of approximately 6 x 10-4, showing one of the highest deuterium contents yet encountered for a Solar System species, without considering a specific fraction of a sample. (U.K.)
Journal
Nature (London); ISSN 0028-0836; ; v. 294(5842); p. 639-641
; v. 294(5842); p. 639-641
[en] A technique utilizing guanidine hydrochloride has been used to determine 18O/16O ratios in water. These O-isotope ratios have been considered in conjuction with 18O/16O ratios obtained from equilibration of CO2 with surplus water to obtain a value for the carbon dioxide-water fractionation factor at 250C of 1.04143 +/- 0.00032 (99% confidence interval). This determination of αCO2-H2O falls within the range of values cited in teh literature. 27 references, 3 tables
Journal