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n.1.(Min.) A variety of allanite occurring in slender prismatic crystals.
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
References in periodicals archive ?
Although the rocks of the Ob and Novosibirsk massifs show the S-type granitoids features, they are closer to I-granites (more mafic, contain hornblende, accessory magnetite, orthite, high degree of oxidation of iron, are formed at high oxygen fugacity, high concentration of Ba, Sr, normal or high concentration of Ca).
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. Apparently Gustav and Lommel had been field-collecting partners.
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.