| Reference Type | Journal (article/letter/editorial) |
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| Title | Polytypism of heterogenite |
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| Journal | Mineralogical Magazine |
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| Authors | Deliens, M. | Author |
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| Goethals, H. | Author |
| Year | 1973 (June) | Volume | 39 |
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| Issue | 302 |
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| Publisher | Mineralogical Society |
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| Download URL | https://rruff.info/doclib/MinMag/Volume_39/39-302-152.pdf+ |
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| DOI | doi:10.1180/minmag.1973.039.302.03Search in ResearchGate |
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| Generate Citation Formats |
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| Mindat Ref. ID | 6663 | Long-form Identifier | mindat:1:5:6663:5 |
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| GUID | 0 |
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| Full Reference | Deliens, M., Goethals, H. (1973) Polytypism of heterogenite. Mineralogical Magazine, 39 (302) 152-157 doi:10.1180/minmag.1973.039.302.03 |
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| Plain Text | Deliens, M., Goethals, H. (1973) Polytypism of heterogenite. Mineralogical Magazine, 39 (302) 152-157 doi:10.1180/minmag.1973.039.302.03 |
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| In | (1973, June) Mineralogical Magazine Vol. 39 (302) Mineralogical Society |
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| Abstract/Notes | SummaryA new variety of heterogenite was found in samples from Mindigi, Shaba, Zaïre. Photometric reflectance varies from 0·235 to 0·165 at λ 5890 Å in air. The bireflectance is 0·070, the degree of anisotropy is 0·7 and the main index in air is 2·7. A thermal weight-loss curve and a microprobe analysis are given and discussed, indicating the formula (Co,Ni) O.OH.The new variety, referred to as heterogenite-H, is hexagonal with cell dimensions a 2·85, c 8·80, space group P63/mmc and cell-content 2 [(Co, Ni)O.OH)]. Indexed X-ray powder data are given. A crystal structure is suggested based on CoO.OH octahedra layers and indicating a polytypic relation between heterogenite-H, the 2H form, and normal heterogenite, the 3R form. |
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