Citation: Kampf, A. R.; Ross, C. R. (1988). End-member villyaellenite from Mapimi, Durango, Mexico: Descriptive mineralogy, crystal structure, and implications for the ordering of Mn and Ca in type villyaellenite Note: refinition of villyaellenite and introduction of miguelromeroite results in a name change for this structure refinement Locality: Mapimi, Durango, Mexico. American Mineralogist, 73, pp. 1172-1178.