| Kampf, A.R., Ross, C.R. (1988). End-member villyaellenite from Mapimi, Durango, Mexico Kampf, A.R., Dunn, P.J. (1987). Ogdensburgite from Mapimi and new data for the species. American Mineralogist, 72(3-4), 409-412. descriptive mineralogy, crystal structure, and implications for the ordering of Mn and Ca in type villyaellenite. American Mineralogist, 73(9-10), 1172-1178. |