Abstract

Rhabdophane has been identified by x-ray diffraction in a rock specimen from the abandoned Champion pegmatite, Amelia County, Virginia. The mineral, hexagonal (RE)PO4·H2O, also occurs at Cornwall, England, and Salisbury, Connecticut (Hildebrand et at., 1957). Although rhabdophane is apparently rare, there has been much interest in it recently because of the discovery of several related minerals. Brockite, (Ca,Th) PO4·H2O, recently described by Fisher and Meyrowitz (1962) is probably isostructural with rhabdophane. Impure thorium phosphates, probably related to brockite, have been reported by Dooley and Hathaway (1961).

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