Boron isotopic compositions of some boron minerals

Details Boron isotopic compositions of some boron minerals Boron isotopic compositions of some boron minerals

Dec 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989gecoa..53.3189o&link_type=abstract

Geochimica et Cosmochimica Acta, vol. 53, Issue 12, pp.3189-3195

Mathematics

Logic

9

Scientific paper

Boron minerals that have different structural formulae but are supposed to have the same geologic origin have been collected and analyzed for the 11 B / 10 B isotopic ratio. It has been reconfirmed that minerals of marine origin have higher 11 B / 10 B ratios than those of nonmarine origin. It has been found that the sequence of decreasing 11 B / 10 B values among the minerals with the same geologic origin is; borax, tincal, kernite (Na borates) > ulexite ( Na / Ca borate) > colemanite, iyoite, meyerhofferite (Ca borates). This sequence is explainable on the basis of the difference in crystal structure among the minerals. That is, minerals with higher BO 3 / BO 4 ratios, (the ratio of the number of the BO 3 triangle units to the number of the BO 4 tetrahedron units in the structural formula of a mineral) have higher 11 B / 10 B ratios.

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