Computer Science
Scientific paper
Aug 1976
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976gecoa..40..889b&link_type=abstract
Geochimica et Cosmochimica Acta, vol. 40, Aug. 1976, p. 889-896. ERDA-supported research;
Computer Science
10
Chondrule, Crystallization, Crystallography, Forsterite, Metastable State, Crystal Structure, Laser Heating, Lunar Soil, Meteoritic Microstructures, Nucleation, Photomicrography, Silicon Dioxide, Supercooling
Scientific paper
Laser-melted magnesium silicate droplets were supercooled 400-750 C below their equilibrium liquidus temperatures before crystallization and their texture was compared with that of meteoritic and lunar chondrules. Crystal morphology, width and texture were studied in relation to nucleation temperature and bulk composition. It was found that the only phase to nucleate from the forsterite-enstatite normative melts was forsterite. Highly siliceous glass, about 65% SiO2 by weight, was identified interstitially to the forsterite crystals in seven of the MgSiO4 spherules and was thought to be present in all.
Blander Milton
Keil Klaus
Nelson S. L.
Planner H. N.
Richardson N. L.
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