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n.1.(Min.) A variety of allanite occurring in slender prismatic crystals.
References in periodicals archive ?
In that year Karl von Leon-hard's son, Gustav von Leonhard (who eventually took over from his father as editor of Neues Jahrbuch fur Mineralogie), published an article about orthite.
For a long time it was also known as orthite, being related to the "orthite" and "pyrrorthite" described by Berzelius from the granitic pegmatites in the Falun area in northern Bergslagen.