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Science 20 March 1992:
Vol. 255. no. 5051, pp. 1551 - 1553
DOI: 10.1126/science.255.5051.1551
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Articles

Evidence for Ammonium-Bearing Minerals on Ceres

TRUDE V. V. KING 1, R. N. CLARK 1, W. M. CALVIN 1, D. M. SHERMAN 1, and R. H. BROWN 2

1 U.S. Geological Survey, Denver, CO 80225
2 Jet Propulsion Laboratory, Pasadena, CA 91109

Spectra obtained from recent telescopic observation of 1-Ceres and laboratory measurements and theoretical calculations of three component mixtures of Ceres analog material suggest that an ammoniated phyllosilicate is present on the surface of the asteroid, rather than H2O frost as had been previously reported. The presence of an ammoniated phyllosilicate, most likely ammoniated saponite, on the surface of Ceres implies that secondary temperatures could not have exceeded 400 kelvin.

Submitted on November 13, 1991
Accepted on February 3, 1992


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Oxygen and Asteroids.
T. H. Burbine, A. S. Rivkin, S. K. Noble, T. Mothe-Diniz, W. F. Bottke, T. J. McCoy, M. D. Dyar, and C. A. Thomas (2008)
Reviews in Mineralogy and Geochemistry 68, 273-343
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