| Reference Type | Journal (article/letter/editorial) |
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| Title | An explanation for the origin of hemihedrism in wulfenite: the single-crystal structures of I41/a and I tungstenian wulfenites |
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| Journal | Mineralogical Magazine |
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| Authors | Hibbs, D. E. | Author |
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| Jury, C. M. | Author |
| Leverett, P. | Author |
| Plimer, I. R. | Author |
| Williams, P. A. | Author |
| Year | 2000 (December) | Volume | 64 |
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| Page(s) | 1057-1062 | Issue | 6 |
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| Publisher | Mineralogical Society |
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| DOI | doi:10.1180/002646100550056Search in ResearchGate |
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| Classification | Not set | LoC | Not set |
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| Mindat Ref. ID | 243241 | Long-form Identifier | mindat:1:5:243241:4 |
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| GUID | 54c973f9-d943-4758-aa1f-f681113e6c91 |
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| Full Reference | Hibbs, D. E., Jury, C. M., Leverett, P., Plimer, I. R., Williams, P. A. (2000) An explanation for the origin of hemihedrism in wulfenite: the single-crystal structures of I41/a and I tungstenian wulfenites. Mineralogical Magazine, 64 (6) 1057-1062 doi:10.1180/002646100550056 |
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| Plain Text | Hibbs, D. E., Jury, C. M., Leverett, P., Plimer, I. R., Williams, P. A. (2000) An explanation for the origin of hemihedrism in wulfenite: the single-crystal structures of I41/a and I tungstenian wulfenites. Mineralogical Magazine, 64 (6) 1057-1062 doi:10.1180/002646100550056 |
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| Abstract/Notes | The single-crystal X-ray structure of tungstenian wulfenite-I41/a containing 10 mol.% WO3 from the San Francisco mine, Sonora, Mexico, space group I41/a, a = 5.436(2), c = 12.068(8)Å and Z = 4, has been refined to R = 0.052. The Mo and W are disordered over special position 4a (0,0,0) in the lattice. Tungstenian wulfenite-I4̄ (‘chillagite’) from the Christmas Gift mine, Chillagoe, Queensland, Australia (Museum of Victoria specimen M16934), crystallizes in the closely related tetragonal space group I4̄, with a = 5.441(1), c = 12.068(6) Å and Z = 4. The structure was refined to R = 0.038. Refined site occupancy factors show that Mo and W are not distributed equally over the two crystallographically independent Mo/W positions, being 0.136(2) for Mo and 0.114(2) for W in special position 2a (0,0,0) and 0.184(2) for Mo and 0.066(2) for W in special position 2c (0,Ý,Ü). These give a composition corresponding to wulfenite64stolzite36, in agreement with analytical data. The Mo/W distributions in the unit cell provide one explanation for the origin of hemihedrism in the wulfenite-stolzite series. |
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