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Monazite-(Ce) is the most common representative of the monazite group. It is the cerium-dominant analogue of
monazite-(La) Monazite-(La) is a relatively rare representative of the monazite group, with lanthanum being the dominant rare earth element The rare-earth elements (REE), also called the rare-earth metals or (in context) rare-earth oxides or sometimes the ...
,
monazite-(Nd) Monazite-(Nd) is a relatively rare representative of the monazite group, with neodymium being the dominant rare earth element in its structure. This variety of monazite is typically colored bright rose-red. It is the neodymium analogue of monazite- ...
, and
monazite-(Sm) Monazite-(Sm) is an exceedingly rare representative of the monazite group, with samarium being the dominant rare earth element in its structure. It is the samarium analogue of monazite-(Ce), monazite-(La), and monazite-(Nd) Monazite-(Nd) is a rela ...
. It is also the phosphorus analogue of gasparite-(Ce). The group contains simple rare earth phosphate minerals with the general formula of A''T''O4, where A = Ce, La, Nd, or Sm (or, rarely, Bi), and B = P or, rarely, As. The A site may also bear Ca and Th. Mindat, Monazite Group, https://www.mindat.org/min-29313.html


References

{{reflist Cerium minerals Lanthanide minerals Phosphate minerals Monoclinic minerals Minerals in space group 14