Spectral chemistry of green glass‐bearing 15426 regolith
- 10 November 1983
- journal article
- Published by American Geophysical Union (AGU) in Journal of Geophysical Research
- Vol. 88 (S01) , B221-B228
- https://doi.org/10.1029/jb088is01p0b221
Abstract
The detection of appreciable concentrations of ferric iron in a synthetic green glass equilibrated at an oxygen fugacity of 10−11 atm prompted a Mossbauer spectral study of pristine emerald‐green glass spherules carefully handpicked from regolith sample 15426. No Fe3+ ions were detected in this lunar sample or in a synthetic green glass simulant equilibrated at f0 2 = 10−14 atm, suggesting that the green glass clods in rock 15426 formed under conditions of correspondingly low oxygen fugacities. The Mossbauer spectra indicated the presence of olivine crystallites in the lunar emerald green glass spherules. Measurements of homogeneous and partially devitrified synthetic silicate glasses revealed that significant changes of coordination environment about Fe2+ ions in the glass structure occur during crystallization of olivine crystals from the melt.Keywords
This publication has 3 references indexed in Scilit:
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- Apollo 15 green glassesPhysics of the Earth and Planetary Interiors, 1973
- Applications of the Mössbauer effect to silicate mineralogy—I. Iron silicates of known crystal structureGeochimica et Cosmochimica Acta, 1967