Pararobertsite, Ca2Mn3+3(PO4)3O2.3H2O, a New Mineral Species from the Tip Top Pegmatite, Custer County, South Dakota, and Its Relationship to Robertsite
Roberts, A. C., Sturman, B. D., Dunn, Pete J., and Roberts, W. L. 1989. "Pararobertsite, Ca2Mn3+3(PO4)3O2.3H2O, a New Mineral Species from the Tip Top Pegmatite, Custer County, South Dakota, and Its Relationship to Robertsite." Canadian Mineralogist, 27 451–455.