Characterization of Blue Tourmaline from Madagascar for Exploring Its Color Origin

Table 1

Different binding configurations, estimated atomic percentages, and occupancy sites of Fe and Mn.

Binding configurations	Estimated atomic percentages (%)	Site
Fe^2+—O	19.6	Y
Fe^3+—O	39.4	Z
Fe^3+—F	41.0	Y
Mn^2+—O	100	Y