| Reference Type | Journal (article/letter/editorial) |
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| Title | Nordstrandite in Bauxite Derived from Phonolite, Lages, Santa Catarina, Brazil |
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| Journal | Clays and Clay Minerals |
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| Authors | Dani, Norberto | Author |
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| Formoso, Milton Luiz Laquintinie | Author |
| Decarreau, Alain | Author |
| Meunier, Alain | Author |
| Year | 2001 (June) | Volume | 49 |
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| Page(s) | 216-226 | Issue | 3 |
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| Publisher | Cambridge University Press (CUP) |
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| URL | |
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| DOI | doi:10.1346/ccmn.2001.0490304Search 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 | 147632 | Long-form Identifier | mindat:1:5:147632:7 |
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| GUID | 0 |
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| Full Reference | Dani, Norberto, Formoso, Milton Luiz Laquintinie, Decarreau, Alain, Meunier, Alain (2001) Nordstrandite in Bauxite Derived from Phonolite, Lages, Santa Catarina, Brazil. Clays and Clay Minerals, 49 (3). 216-226 doi:10.1346/ccmn.2001.0490304 |
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| Plain Text | Dani, Norberto, Formoso, Milton Luiz Laquintinie, Decarreau, Alain, Meunier, Alain (2001) Nordstrandite in Bauxite Derived from Phonolite, Lages, Santa Catarina, Brazil. Clays and Clay Minerals, 49 (3). 216-226 doi:10.1346/ccmn.2001.0490304 |
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| In | (2001) Clays and Clay Minerals Vol. 49 (3) Springer Science and Business Media LLC |
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| Abstract/Notes | AbstractNordstrandite from Lages represents the first occurrence of this mineral in an oxisoil that does not involve the influence of a calcareous substrate. This is also the first reported occurrence in Brazil. Nordstrandite occurs near the city of Lages only in the weathered bedrock facies, mostly where the circulation of meteoric water is restricted. There is also a close association between nordstrandite and the weathering of modified pseudoleucite structures. The interaction of meteoric water and feldspathic alkaline country rock with uncommon texture and mineralogy (rich in nepheline, sodalite, nosean, analcime and natrolite) promotes the development of solutions enriched in alkaline ions with basic pH, necessary to form nordstrandite. A detailed study by X-ray diffraction (XRD) and infrared (IR) spectroscopy in natural or chemically leached samples was performed to identify the Al(OH)3 polymorphs of gibbsite and nordstrandite. |
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