1. Department of Geology, Valencia University (UVEG), 46100 Burjasot (Valencia), Spain
2. Institute of Mathematics and Cryptology, Military University of Technology, 00-908 Warsaw, Poland
3. Department of Inorganic Chemistry, UVEG, 46100 Burjasot (Valencia), Spain
4. Materials Science Institute (ICMUV), UVEG, 46980 Paterna (Valencia), Spain
5. X Ray Diffraction Service, Faculty of Sciences, UAB, Bellaterra (Barcelona), Spain