This research was made possible by the financial support of FEES-CONARE (Ref 115B5662), the University of Costa Rica (UCR), the Costa Rica Institute of Technology (TEC) and the National Lab-oratory of Nanotechnology (LANOTEC). The authors thank the PINN program (PI-0132-15) of the Ministry of Science Technology and Telecommunications (MICITT) of Costa Rica and the Postgraduate Office of the TEC by the doctoral scholarships granted to Andrea M. Araya-Sibaja. The authors are grateful for the collaboration pro-vided by the Universidade Federal de Santa Catarina, Brazil by its laboratories: Laboratório de Difraca??o de Raios-X (LDRX) for the variable temperature PXRD and variable temperature Raman ana-lyses, and Laboratório de Controle de Qualidade for the IDR determinations. （Ref 115B5662）