Reference Type | Journal (article/letter/editorial) |
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Title | Ludwigite from central Sweden: new data and crystal structure
refinement |
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Journal | Mineralogical Magazine | ISSN | 0026-461X |
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Authors | Appel, P. W. U. | Author |
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Brigatti, M. F. | Author |
Year | 1999 (August) | Volume | 63 |
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Page(s) | 511-518 | Issue | 4 |
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Publisher | Mineralogical Society |
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Download URL | https://rruff.info/doclib/MinMag/Volume_63/63-4-511.pdf+ |
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DOI | doi:10.1180/002646199548682Search in ResearchGate |
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Mindat Ref. ID | 1302 | Long-form Identifier | mindat:1:5:1302:8 |
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GUID | 5cd33286-437c-4b34-8a6a-cd9455831085 |
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Full Reference | Appel, P. W. U., Brigatti, M. F. (1999) Ludwigite from central Sweden: new data and crystal structure
refinement. Mineralogical Magazine, 63 (4) 511-518 doi:10.1180/002646199548682 |
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Plain Text | Appel, P. W. U., Brigatti, M. F. (1999) Ludwigite from central Sweden: new data and crystal structure
refinement. Mineralogical Magazine, 63 (4) 511-518 doi:10.1180/002646199548682 |
---|
Abstract/Notes | AbstractLudwigite from B-bearing iron ores in the Bergslagen area of central Sweden and in the coastal area north of Stockholm has been studied using chemical and single-crystal diffraction techniques. Structure refinements, completed for three crystals showing slightly different Al contents, in the space group Pbam (agreement factor: 2.42 ≤ R ≤ 2.79) indicate that: (1) octahedral M1, M2 and M3 bond distances are similar, although the calculated site population suggests that M1 and M2 are nearly completely occupied by Mg whereas M3 also contains Fe2+ and Fe3+; (2) in the M4 octahedron Fe3+ and Al dominate over Mg (and Fe2+); and (3) the distortion parameter, BLD, indicates that M3 is the most regular, whereas M4 is the most distorted octahedron. |
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