It has been found that there are >250 types of As bearing minerals in the environment (Rahaman et al., 2008). Arsenopyrite (FeAsS) is the most abundant As bearing mineral and other As bearing minerals such as n
where each Ni is coordinated with six Cl, and each Cl forms coordination bonds with three Ni. In NiCl2, the Ni-Cl bonds have ionic characteristics. Yellow NiBr2 and black NiI2 also have similar structures, but due to the different filling modes of halogen atoms, these two...