| Reference Type | Journal (article/letter/editorial) |
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| Title | Niobian K–Ba–V titanates from micaceous kimberlite, Star mine, Orange Free State, South Africa |
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| Journal | Mineralogical Magazine | ISSN | 0026-461X |
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| Authors | Mitchell, Roger H. | Author |
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| Meyer, Henry O. A. | Author |
| Year | 1989 (September) | Volume | 53 |
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| Issue | 372 |
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| Publisher | Mineralogical Society |
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| Download URL | https://rruff.info/doclib/MinMag/Volume_53/53-372-451.pdf+ |
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| DOI | doi:10.1180/minmag.1989.053.372.04Search in ResearchGate |
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| Generate Citation Formats |
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| Mindat Ref. ID | 1529 | Long-form Identifier | mindat:1:5:1529:9 |
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| GUID | 0 |
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| Full Reference | Mitchell, Roger H., Meyer, Henry O. A. (1989) Niobian K–Ba–V titanates from micaceous kimberlite, Star mine, Orange Free State, South Africa. Mineralogical Magazine, 53 (372) 451-456 doi:10.1180/minmag.1989.053.372.04 |
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| Plain Text | Mitchell, Roger H., Meyer, Henry O. A. (1989) Niobian K–Ba–V titanates from micaceous kimberlite, Star mine, Orange Free State, South Africa. Mineralogical Magazine, 53 (372) 451-456 doi:10.1180/minmag.1989.053.372.04 |
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| In | (1989, September) Mineralogical Magazine Vol. 53 (372) Mineralogical Society |
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| Abstract/Notes | AbstractCompositional data are presented for Nb-Ba-K-V titanates from micaceous kimberlite (Star mine, S. Africa). These data significantly extend the previously known range of solid solutions in naturally occurring members of the hollandite group. Two distinct suites of crystals occur. One is a suite of primary groundmass prismatic crystals that are Ba-K-V-rich and represent solid-solutions from the priderite series towards mannardite. The second suite consists of anhedral xenocrysts that are Ba-free. In this suite relatively Nb-rich varieties (>4.0% Nb2O5) represent solid-solution towards a niobian-bearing potassian analogue of mannardite, whereas relative Nb-poor (<3.0% Nb2O5) varieties are Nb-bearing vanadian priderites. These hollandite-group minerals have compositions that differ significantly from priderites found in lamproites. |
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