| 释义 |
obruchevite Min.|ɒˈbruːtʃəvaɪt|
[ad. Russ. obruchevit, f. the name of V. A. Obruchev (1863–1956), Russian geologist: see -ite1.]
A mineral containing appreciable proportions of yttrium and uranium that was orig. regarded as a member of the pyrochlore group (see quot. 1977).
1955Internat. Conf. Peaceful Uses Atomic Energy (United Nations) U.S.S.R.: Sci. & Techn. Exhib. 9 These classes of minerals include.. obruchevite. 1959Mineral. Abstr. XIV. 54/1 In 1945 E. I. Nefedov discovered in a pegmatite vein in the Alakuztti region (N.W. Karelia) a peculiar metamict tantalo-niobate, which he classed with ellsworthite. In 1949 A. A. Beus after a study of this mineral called it obruchevite in honour of V. A. Obruchev... Obruchevite replaces albite and infills cracks in quartz. It occurs in association with garnet and other minerals as nests and irregular masses up to 5 cm. in diameter. 1966Z. Lerman tr. Vlasov's Geochem. & Mineral. Rare Elements II. 509 The mode of occurrence of obruchevite and its mineral paragenesis show that it forms during the latest stages of the replacement process. 1977Amer. Mineralogist LXII. 407/1 [Report of the Subcommittee on Pyrochlore Nomenclature of the IMA Commission on New Minerals and Mineral Names.] Synonyms, doubtful and discredited names, and species not belonging to the pyrochlore group... Obruchevite (Kalita, 1957) is a name later shown to have been given to two different species (Gorzhevskaya and Sidorenko, 1969). One of these, brown obruchevite, after heating to 700°C, crystallized to the samiresite S phase... The other, black obruchevite, was subsequently renamed yttropyrochlore (Kupriyanova, 1970, unpublished). The Soviet Union's Commission of New Minerals (KNM) and Mineralogical Terminology have recommended the name yttropyrochlore replace this type of obruchevite. |