A rare earth mineral is a mineral which contains one or more rare earth elements as major metal constituents. Rare earth minerals are usually found in association with alkaline to peralkaline igneous complexes, in pegmatites associated with alkaline magmas and in or associated with carbonatite intrusives. Perovskite mineral phases are common hosts to rare earth elements within the alkaline complexes. Mantle derived carbonate melts also are carriers of the rare earths. Hydrothermal deposits associated with alkaline magmatism contain a variety of rare earth minerals.
The following includes the relatively common hydrothermal rare earth minerals and minerals which often contain significant rare earth substitution:
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Famous quotes containing the words rare and/or earth:
“The word of the LORD was rare in those days; visions were not widespread.”
—Bible: Hebrew, 1 Samuel 3:1.
“You may decry some of these scruples and protest that there are more things in heaven and earth than are dreamt of in my philosophy. I am concerned, rather, that there should not be more things dreamt of in my philosophy than there are in heaven or earth.”
—Nelson Goodman (b. 1906)