| Reference Type | Journal (article/letter/editorial) |
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| Title | Motukoreaite—additional data and comparison with related minerals |
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| Journal | Mineralogical Magazine | ISSN | 0026-461X |
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| Authors | Brindley, G. W. | Author |
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| Year | 1979 (September) | Volume | 43 |
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| Issue | 327 |
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| Publisher | Mineralogical Society |
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| Download URL | https://rruff.info/doclib/MinMag/Volume_43/43-327-337.pdf+ |
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| DOI | doi:10.1180/minmag.1979.043.327.04Search in ResearchGate |
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| Generate Citation Formats |
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| Mindat Ref. ID | 3039 | Long-form Identifier | mindat:1:5:3039:1 |
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| GUID | 0 |
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| Full Reference | Brindley, G. W. (1979) Motukoreaite—additional data and comparison with related minerals. Mineralogical Magazine, 43 (327) 337-340 doi:10.1180/minmag.1979.043.327.04 |
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| Plain Text | Brindley, G. W. (1979) Motukoreaite—additional data and comparison with related minerals. Mineralogical Magazine, 43 (327) 337-340 doi:10.1180/minmag.1979.043.327.04 |
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| In | (1979, September) Mineralogical Magazine Vol. 43 (327) Mineralogical Society |
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| Abstract/Notes | SummaryMotukoreaite resembles hydrotalcite and has positively charged brucite-like layers separated by carbonate and sulphate anions and water molecules. Four phases are recognized. Phase I, the normal mineral with an 11.1 Å basal spacing, readily changes to a mixture of phase I and a partially dehydrated phase II. Phase III with a basal spacing 8.7 Å persists from 50–170°C. Phase II is a pseudo-regular interstratification of phases I and III, with a spacing 11.1 + 8.7 = 19.8 Å; second- and third-order reflections are observed. Phase IV with a 7.5 Å spacing is obtained by treating motukoreaite with sodium carbonate solution to replace SO4 by CO3 anions. Motukoreaite itself shows only slight tendency to transform to a 7.5 Å phase by heat-treatment alone. Comparison is made with the mineral carrboydite, a NiAl sulphate carbonate hydrate. The possibility is considered that sulphate anions may substitute partially in the brucite-like layers to compensate for a deficiency of hydroxyl ions. |
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These are possibly similar items as determined by title/reference text matching only.
