| References: | Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 355; Crawford, W.P. (1930), Notes on Rickardite, a new occurrence, Am.Min.: 15: 272-273; Galbraith, F.W. (1947), Minerals of AZ, AZ Bur. of Mines Bull. 153: 17; Moore, R.T. (1953), Minerals and Metals of Increasing Interest, Rare and Radioactive Minerals, AZ Bur. Mines Bull. 163: 19. |