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Science 20 September 1963:
Vol. 141. no. 3586, pp. 1179 - 1180
DOI: 10.1126/science.141.3586.1179
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Articles

Apatite: Origin of Blue Color

P. D. Johnson 1, J. S. Prener 1, and J. D. Kingsley 1

1 General Electric Research Laboratory, Schenectady, New York

The optical absorption and emission spectra of natural blue apatite are similar enough to spectra of synthetic compounds containing MnO4-3 to conclude that the blue color of natural apatite results from the presence of this ion.

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Science. ISSN 0036-8075 (print), 1095-9203 (online)