Acknowledgments This research was supported by the Instituto de Metalurgia of en Materiales Avanzados. Unidad Chihuahua. The financial support was provided by Consejo Nacional de Ciencia y Tecnologia under the project "Renovacion de Equipo Mayor de Caracterizacion de Minerales y Materiales", number 000000000123487, which was assigned as a part of the program "Apoyos Complementarios para la Actualizacion de Equipo Cientifico 2009". Also, technical assistance ofMSc Rosalinda Tovar Tovar is fully appreciated