| Reference Type | Journal (article/letter/editorial) |
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| Title | Nioboaeschynite-(Ce), Ce(NbTi)O6 |
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| Journal | Acta Crystallographica Section E Structure Reports Online |
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| Authors | Morrison, Shaunna M. | Author |
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| Downs, Robert T. | Author |
| Domanik, Kenneth J. | Author |
| Yang, Hexiong | Author |
| Doell, Donald | Author |
| Year | 2012 (August 1) | Volume | 68 |
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| Issue | 8 |
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| Publisher | International Union of Crystallography (IUCr) |
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| Download URL | https://rruff.info/rruff_1.0/uploads/ACE68_i64_2.pdf+ |
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| DOI | doi:10.1107/s1600536812031765Search in ResearchGate |
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| Generate Citation Formats |
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| Classification | Not set | LoC | Not set |
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| Mindat Ref. ID | 4778934 | Long-form Identifier | mindat:1:5:4778934:6 |
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| GUID | 0 |
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| Full Reference | Morrison, Shaunna M., Downs, Robert T., Domanik, Kenneth J., Yang, Hexiong, Doell, Donald (2012) Nioboaeschynite-(Ce), Ce(NbTi)O6. Acta Crystallographica Section E Structure Reports Online, 68 (8) 64-65 doi:10.1107/s1600536812031765 |
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| Plain Text | Morrison, Shaunna M., Downs, Robert T., Domanik, Kenneth J., Yang, Hexiong, Doell, Donald (2012) Nioboaeschynite-(Ce), Ce(NbTi)O6. Acta Crystallographica Section E Structure Reports Online, 68 (8) 64-65 doi:10.1107/s1600536812031765 |
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| In | (2012, August) Acta Crystallographica Section E Structure Reports Online Vol. 68 (8) International Union of Crystallography (IUCr) |
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| Abstract/Notes | Nioboaeschynite-(Ce), ideally Ce(NbTi)O6[cerium(III) niobium(V) titanium(IV) hexaoxide; refined formula of the natural sample is Ca0.25Ce0.79(Nb1.14Ti0.86)O6], belongs to the aeschynite mineral group which is characterized by the general formulaAB2(O,OH)6, where eight-coordinatedAis a rare earth element, Ca, Th or Fe, and six-coordinatedBis Ti, Nb, Ta or W. The general structural feature of nioboaeschynite-(Ce) resembles that of the other members of the aeschynite group. It is characterized by edge-sharing dimers of [(Nb,Ti)O6] octahedra which share corners to form a three-dimensional framework, with theAsites located in channels parallel to thebaxis. The averageA—O andB—O bond lengths in nioboaeschynite-(Ce) are 2.471 and 1.993 Å, respectively. Moreover, another eight-coordinated site, designated as theCsite, is also located in the channels and is partially occupied byA-type cations. Additionally, the refinement revealed a splitting of theAsite, with Ca displaced slightly from Ce (0.266 Å apart), presumably resulting from the crystal-chemical differences between the Ce3+and Ca2+cations. |
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