Bibliographic Citation
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| Title | EUXENITE AND PRIORITE--TWO POLYMORPHIC VARIETIES OF YNbTiO$sub 6$ |
| Creator/Author | komkov, A.I. |
| Publication Date | 1963 Jan 21 |
| OSTI Identifier | OSTI ID: 4727433 |
| Other Number(s) | Journal ID: DANKA; Other: 0002-3264 |
| Resource Type | Journal Article |
| Resource Relation | Journal Name: Doklady Akademii Nauk SSSR (U.S.S.R.) English translation currently published in a number of subject-oriented journals; Journal Volume: Vol: 148; Other Information: Orig. Receipt Date: 31-DEC-63 |
| Research Org | All-Union Geological Scientific Research Inst., USSR |
| Subject | CHEMISTRY; ALLOTROPY; BLOMSTRANDINE; CALCIUM; CALCIUM COMPOUNDS; CERIUM COMPOUNDS; CERIUM OXIDES; CHEMICAL REACTIONS; CONFIGURATION; CRYSTALLOGRAPHY; CRYSTALS; EUXENITE; HIGH TEMPERATURE; HYDROLOGY; HYDROXIDES; IMPURITIES; IRON; IRON COMPOUNDS; LATTICES; MIXING; NIOBIUM COMPOUNDS; NIOBIUM OXIDES; PREPARATION; PYROLYSIS; QUALITATIVE ANALYSIS; RARE EARTHS; SILICATES; SINTERING; TANTALUM OXIDES; THORIUM; THORIUM COMPOUNDS; THORIUM OXIDES; TITANIUM OXIDES; URANIUM; URANIUM COMPOUNDS; URANIUM MINERALS; YTTRIUM COMPOUNDS; YTTRIUM OXIDES |
| Description/Abstract | Euxenite and priorite are considered as 2 minerals of varying compositions, containing Y, Nb, Ti, and O; in addition, rare earths, Th, U, Ca, and Fe may also be present in form of isomorphous admixtures. Euxenite is isomorphous with an artificial material. YNbTiO/sub 6/, prepared by sintering the equivalent oxides Y/sub 2/O/sub 3/, Nb/sub 2/O/sub 5/, and 2TiO/su b 2/ at 1100 deg C; priorite is isomorphous with the similar CeNbTiO/sub 6/, also prepared by sintering. Further study revealed that the mixture having the composition of YNbTiO/sub 6/ has 2 polymorphic modifications, one corresponding to euxenite, the other to priorite. The artificial priorite was prepared by a hydrothermal method at 350 deg C, transforming the equivalent oxides into the hydroxide form; the artificial euxenite was prepared by calcining, as mentioned above. There is no true chemical difference, only crystallographic difference between the 2 minerals. There are natural euxenites with Th> U content and priorites with U > Th content. (TTT) |
| Country of Publication | Country unknown/Code not available |
| Language | Russian |
| Format | Medium: X; Size: Pages: 679-80 |
| System Entry Date | 2009 Dec 15 |
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