Phosphide from Meteorites: Barringerite, a New Iron-Nickel Mineral
- 11 July 1969
- journal article
- Published by American Association for the Advancement of Science (AAAS) in Science
- Vol. 165 (3889) , 169-171
- https://doi.org/10.1126/science.165.3889.169
Abstract
Schreibersite, (Fe,Ni)3P, and a higher phosphide, barringerite, occur in the Ollague pallasite. The composition of the higher phosphide, determined by electron probe microanalysis, is (Fe0.58Ni0.42Co0.003)1.95P. It is hexagonal, with space group P62m and a = 5.87 ± 0.07 angstroms and c = 3.44 ± 0.04 angstroms. If we assume a primary origin, the new mineral indicates that troilite and schreibersite crystallized at high temperatures. The occurrence of a higher phosphide in a pallasite indicates local nonequilibria within a group of meteorites that are remarkable for their overall degree of equilibrium crystallization.Keywords
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