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Science 17 November 1967:
Vol. 158. no. 3803, pp. 910 - 911
DOI: 10.1126/science.158.3803.910
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Articles

Stanfieldite: A New Phosphate Mineral from Stony-Iron Meteorites

Louis H. Fuchs 1

1 Chemistry Division, Argonne National Laboratory, Argonne, Illinois 60439

A new mineral, stanfieldite, Ca4(Mg,Fe)5(PO4)6, has been found in the Estherville mesosiderite and several pallasites: Santa Rosalia, Albin, Finmarken, Imilac, Mount Vernon, and Newport. The atom ratio Mg:Fe of this mineral varies from 1.5 in Estherville to a constant ratio of about 15 in the pallasites. X-ray, optical, and chemical data for the mineral resemble those for the only intermediate compound in the system Mg3(PO4)2-Ca3(PO4)2.

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