| Reference Type | Journal (article/letter/editorial) |
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| Title | The chemistry and structure of redledgeite |
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| Journal | Mineralogical Magazine | ISSN | 0026-461X |
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| Authors | Gatehouse, B. M. | Author |
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| Jones, G. C. | Author |
| Pring, A. | Author |
| Symes, R. F. | Author |
| Year | 1986 (December) | Volume | 50 |
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| Issue | 358 |
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| Publisher | Mineralogical Society |
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| Download URL | https://rruff.info/doclib/MinMag/Volume_50/50-358-709.pdf+ |
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| DOI | doi:10.1180/minmag.1986.050.358.18Search in ResearchGate |
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| Generate Citation Formats |
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| Mindat Ref. ID | 3917 | Long-form Identifier | mindat:1:5:3917:2 |
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| GUID | 0 |
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| Full Reference | Gatehouse, B. M., Jones, G. C., Pring, A., Symes, R. F. (1986) The chemistry and structure of redledgeite. Mineralogical Magazine, 50 (358) 709-715 doi:10.1180/minmag.1986.050.358.18 |
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| Plain Text | Gatehouse, B. M., Jones, G. C., Pring, A., Symes, R. F. (1986) The chemistry and structure of redledgeite. Mineralogical Magazine, 50 (358) 709-715 doi:10.1180/minmag.1986.050.358.18 |
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| In | (1986, December) Mineralogical Magazine Vol. 50 (358) Mineralogical Society |
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| Abstract/Notes | AbstractTwo distinct habits of redledgeite are described: small black bipyramidal crystals and yellow-green fibres. The mineral is a Ba-Cr-Ti oxide rather than a Mg-Cr-Ti oxide as previously supposed. Electron microprobe analysis gave Ba1.10(Cr1.82Ti5.95 Fe0.10V0.08)Σ7.95O16 and Ba1.27(Cr2.48Ti5.49Fe0.02)Σ7.99 O16 for the black and yellow-green forms respectively. The mineral is a monoclinic hollandite-type phase, space group I2/m, with a = 10.129(2); b = 2.959(1); c = 10.135(2) Å; β = 90.05(11)° and Z = 1; calculated density for the black form is 4.413 g cm−3. The crystal structure was refined to R 6.3%, Rw 7.4% using 1017 reflections with F > 3σ(F) from a set of 1062 unique reflections. Electron diffraction studies revealed weak superlattice reflections, with a period of 2.24b due to tunnel cation ordering. |
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