Yanomamite InAsO4∙2H2O Variscite Botelho, N.F., et al, 1994.
Schwartz-Schampera, U., et al, 2002.
Yixunite PtIn ? Schwartz-Schampera, U., et al, 2002.
Yu, T.H., et al, 1974.
Note 1: The preferential association of In in minerals with Ag, As, Bi, CO3-2, Cu, Fe, H2O, OH-, Pb, Pt, S-2, Sb, Sn, and Zn has profound chemical, exploration and resource estimation implications.
Note 2: The three In-Pt minerals may have special significance, vis-à-vis semiconductors, imaging devices and photovoltaics. Further research is warranted. Note 3: A reasonably thorough literature search indicates that none of these indium minerals has been documented as occurring naturally in Colorado. I believe they have simply been overlooked, primarily because of the difficulty in recognizing such small grain size, intercalated crystals which can be reliably differentiated only with specialized equipment.