1. Department of Chemistry, Padjadjaran University, Jl. Raya Bandung-Sumedang Km. 21, Sumedang 45363, Indonesia
2. Center for Crystal Science and Technology, University of Yamanashi, Kofu, Yamanashi 400-8511, Japan
3. Graduate School of Science Education, University of Bengkulu, Jl. W.R Supratman, Bengkulu 38371, Indonesia
4. Department of Chemistry, Graduate School of Science, Chiba University, Yayoi 1-33, Inage-ku, Chiba 263-8522, Japan