You need JavaScript to view this

Stepwise fluorination - a useful approach for the isotopic analysis of hydrous minerals

Abstract

Analytical uncertainties in oxygen isotopic studies of hydrous silica have been investigated using a partial fluorination procedure in which fractional oxygen yields are achieved by reducing the amount of fluorine. Stepwise reaction of opaline silica results in a set of sequential oxygen fractions which show a wide range of delta/sup 18/O values due to variable amounts of water, organic matter, and other impurities. Delta-values for successive fractions in non-biogenic opal systematically increase as water is reacted away and then remain constant to within +- 0.2 per thousand as the remaining silica reacts. Delta-values in biogenic silica increase similarly but then decrease when low /sup 18/O oxide impurities begin to react. The troublesome water component in opal is readily removed by stepwise fluorination. This technique allows more precise oxygen isotope analysis of non-biogenic opal-A, and may improve the analytical precision for biogenic silica and any silicate mineral containing a significant water component.
Authors:
Haimson, M; Knauth, L P [1] 
  1. Arizona State Univ., Tempe (USA). Dept. of Geology
Publication Date:
Sep 01, 1983
Product Type:
Journal Article
Reference Number:
AIX-15-001136; EDB-84-056671
Resource Relation:
Journal Name: Geochim. Cosmochim. Acta; (United Kingdom); Journal Volume: 47:9
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; OPALS; FLUORINATION; ISOTOPE RATIO; ACCURACY; CHEMICAL COMPOSITION; IMPURITIES; MINERALS; OXYGEN 16; OXYGEN 18; VARIATIONS; WATER; CHALCOGENIDES; CHEMICAL REACTIONS; EVEN-EVEN NUCLEI; HALOGENATION; HYDROGEN COMPOUNDS; ISOTOPES; LIGHT NUCLEI; NUCLEI; OXIDE MINERALS; OXIDES; OXYGEN COMPOUNDS; OXYGEN ISOTOPES; SILICA; SILICON COMPOUNDS; SILICON OXIDES; STABLE ISOTOPES; 400104* - Spectral Procedures- (-1987)
OSTI ID:
5221733
Country of Origin:
United Kingdom
Language:
English
Other Identifying Numbers:
Journal ID: CODEN: GCACA
Submitting Site:
HEDB
Size:
Pages: 1589-1595
Announcement Date:
Feb 01, 1984

Citation Formats

Haimson, M, and Knauth, L P. Stepwise fluorination - a useful approach for the isotopic analysis of hydrous minerals. United Kingdom: N. p., 1983. Web. doi:10.1016/0016-7037(83)90185-0.
Haimson, M, & Knauth, L P. Stepwise fluorination - a useful approach for the isotopic analysis of hydrous minerals. United Kingdom. https://doi.org/10.1016/0016-7037(83)90185-0
Haimson, M, and Knauth, L P. 1983. "Stepwise fluorination - a useful approach for the isotopic analysis of hydrous minerals." United Kingdom. https://doi.org/10.1016/0016-7037(83)90185-0.
@misc{etde_5221733,
title = {Stepwise fluorination - a useful approach for the isotopic analysis of hydrous minerals}
author = {Haimson, M, and Knauth, L P}
abstractNote = {Analytical uncertainties in oxygen isotopic studies of hydrous silica have been investigated using a partial fluorination procedure in which fractional oxygen yields are achieved by reducing the amount of fluorine. Stepwise reaction of opaline silica results in a set of sequential oxygen fractions which show a wide range of delta/sup 18/O values due to variable amounts of water, organic matter, and other impurities. Delta-values for successive fractions in non-biogenic opal systematically increase as water is reacted away and then remain constant to within +- 0.2 per thousand as the remaining silica reacts. Delta-values in biogenic silica increase similarly but then decrease when low /sup 18/O oxide impurities begin to react. The troublesome water component in opal is readily removed by stepwise fluorination. This technique allows more precise oxygen isotope analysis of non-biogenic opal-A, and may improve the analytical precision for biogenic silica and any silicate mineral containing a significant water component.}
doi = {10.1016/0016-7037(83)90185-0}
journal = []
volume = {47:9}
journal type = {AC}
place = {United Kingdom}
year = {1983}
month = {Sep}
}