Orthophosphate compounds of the type A(PO4) include the minerals monazite [RE(PO4) with RE = the light rare-earth ions, e.g., La, Ce, Nd…], xenotime [Y(PO4), and also incorporating the heavy RE ions], and pretulite [Sc(PO4)]. The name of the mineral monazite is derived from the Greek word monazein, “to be solitary,” whereas that of xenotime is derived from the Greek words xenos, meaning “foreign” and time, meaning “honor.” The mineral pretulite is named for Pretul Mountain, located in the Fischbacher Alps in Styria, Austria where the mineral was discovered (...

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