Physics
Scientific paper
Mar 1977
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977rspta.285..403g&link_type=abstract
(Royal Society, Discussion on the Moon - A New Appraisal from Space Missions and Laboratory Analyses, London, England, June 9-12
Physics
6
Emission Spectra, Luminescence, Lunar Rocks, Breccia, Iron, Manganese, Mineralogy, Near Infrared Radiation, Spectral Bands
Scientific paper
Most lunar samples luminesce under proton or electron excitation, and most of the emission comes from the plagioclase present. The cause of this luminescence has been found by investigating the emission and excitation spectra of lunar, terrestrial, and synthesized plagioclases. Emission spectra show three broad peaks: a weak one around 450 nm which is common to most silicates; a dominant one around 560 nm for which the activator is found to be Mn(2+) in Ca sites; and a very weak one between 700 and 780 nm for which the activator is concluded to be Fe(3+) in Al sites. However, this near-infrared peak is usually the dominant one for terrestrial plagioclases; its weakness in lunar samples is attributed to reducing conditions when the lunar surface materials were formed, causing more of the iron to be present as Fe(2+). Luminescence photography of lunar rock chips is found to be a simple method of surveying plagioclase crystal forms in rough samples.
Geake John E.
Mills Andrew A.
Telfer D. J.
Walker Gabrielle
No associations
LandOfFree
The cause and significance of luminescence in lunar plagioclase does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with The cause and significance of luminescence in lunar plagioclase, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The cause and significance of luminescence in lunar plagioclase will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1849908