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Anderson, Mark T.; Phillips, Mark L. F.; Sinclair, Michael B.; Stucky, Galen D. . (1996). Synthesis of Transition-Metal-Doped KTiOPO <sub/>4</sub> and Lanthanide-Doped RbTiOAsO <sub/>4</sub> Isomorphs That Absorb Visible Light. Chemistry of Materials, 8(1), 248–256. doi:10.1021/cm950352i 
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