NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Effects of compositional variation on absorption spectra of lunar pyroxenesPolarized absorption spectra of lunar pyroxenes with a range of iron, calcium, magnesium, titanium and chromium contents were measured on polished, oriented single crystals; spectral data on pure synthetic FeSiO3 were also recorded. The bands at 1 and 2 microns were found to vary significantly in position with composition within the pyroxene quadrilateral; wavelengths increased with increasing calcium and iron. In the visible region, a weak band at 640 nm correlates in intensity with Cr2O3, but not with titanium as had been previously suggested. The 505-nm ferrous iron peak is a sharp doublet in most low-calcium pyroxenes but a singlet in augites. A peak at 475 nm and an intense absorption edge below 700 nm correlated with titanium content.
Document ID
19790055247
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Hazen, R. M.
(Carnegie Institution of Washington Washington, DC, United States)
Bell, P. M.
(Carnegie Institution of Washington Washington, DC, United States)
Mao, H. K.
(Carnegie Institution of Washington Washington, D.C., United States)
Date Acquired
August 9, 2013
Publication Date
January 1, 1978
Subject Category
Lunar And Planetary Exploration
Meeting Information
Meeting: Lunar and Planetary Science Conference
Location: Houston, TX
Start Date: March 13, 1978
End Date: March 17, 1978
Accession Number
79A39260
Funding Number(s)
CONTRACT_GRANT: NGL-09-140-012
Distribution Limits
Public
Copyright
Other

Available Downloads

There are no available downloads for this record.
No Preview Available