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X-Ray Diffraction Analysis of Strontium in Barites

Published online by Cambridge University Press:  10 January 2013

M.C. Osácar Soriano ,
J. Besteiro Ráfales  and
J. González Martínez
M.C. Osácar Soriano
Affiliation:
Dpto. Ciencias de la Tierra (Cristalografia y Mineralogía), Fac. Ciencias.Ciudad Universitaria. 50009-Zaragoza, Spain
J. Besteiro Ráfales
Affiliation:
Dpto. Ciencias de la Tierra (Cristalografia y Mineralogía), Fac. Ciencias.Ciudad Universitaria. 50009-Zaragoza, Spain
J. González Martínez
Affiliation:
Dpto. Ciencias de la Tierra (Cristalografia y Mineralogía), Fac. Ciencias.Ciudad Universitaria. 50009-Zaragoza, Spain
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Abstract

A procedure for Sr-analysis of vein barites by X-ray powder diffraction is described. It is based on the measurement of barite d210 spacing change referenced to NaCl as the internal standard. This procedure covers a range of Sr isomorphic substitution of 0 to 12% SrSO4. Comparison with other values, derived from literature data, shows they are in good agreement with the experimental ones. Statistical analysis of the results yields a maximum absolute error of ±0.50 %SrSO4 in Sr determination. This measurement error proves to be acceptable for most studies of barite in mineral deposits. The effect of Pb-substitution is smaller, in most cases, than this error.

The reported method has the advantage of being fast and simple. It can routinely handle large number of samples as well as small samples isolated from large crystals. Moreover, it allows the recovery of the original sample after the analysis by dissolving the NaCl in water. The main disadvantage is that fair amounts of quartz interfere with the measurement of the position of the barite 210 line.

Type
Research Article
Information
Powder Diffraction , Volume 6 , Issue 2 , June 1991 , pp. 70 - 73
Copyright
Copyright © Cambridge University Press 1991

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References

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