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uranoniobite
uranoniobite n. 
/ˌjʊərənə(ʊ)nʌɪˈəʊbʌɪt/, /ˌjɔːrənə(ʊ)ˈnʌɪə(ʊ)bʌɪt/, /ˌjɔːrənə(ʊ)nʌɪˈəʊbʌɪt/, /ˌjʊrənoʊˌnaɪˈoʊˌbaɪt/ [in sense (a) after German Uranoniobit (H. Rose 1847, in Ann. der Physik u. Chem. 71 166); in sense (b) after German Uranoniobit (R. Hermann 1859, in Jrnl. f. prakt. Chem. 76 326)] now rare or disused (a) = samarskite n.; (b) = uraninite n.
Brit. /ˌjʊərənə(ʊ)ˈnʌɪə(ʊ)bʌɪt/
, /ˌjʊərənə(ʊ)ˈnʌɪə(ʊ)bʌɪt//ˌjʊərənə(ʊ)nʌɪˈəʊbʌɪt//ˌjɔːrənə(ʊ)ˈnʌɪə(ʊ)bʌɪt//ˌjɔːrənə(ʊ)nʌɪˈəʊbʌɪt/U.S. /ˌjʊrənoʊˈnaɪəˌbaɪt/
, /ˌjʊrənoʊˈnaɪəˌbaɪt//ˌjʊrənoʊˌnaɪˈoʊˌbaɪt/ΚΠ
1847 Chem. Gaz. 1 Nov. 430 As regards the mineral, the name uranotantalite is at present just as inappropriate as that of yttroilmenite; it might perhaps be named uranoniobite, had not Heidinger applied the name of niobite to the Bavarian and North American columbite.
1860 Amer. Jrnl. Sci. 29 378 Hermann has given..the name uranoniobite to the crystallized pitchblende from Strömsbeien in Norway.
1919 W. R. Schoeller & A. R. Powell Anal. Minerals & Ores Rarer Elements viii. 183 There are many varieties of the mineral [sc. uraninite]... Uranoniobite contains up to 2.6 per cent. of nitrogen and rare gases.
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