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VOOZH | about |
| Reference Type | Journal (article/letter/editorial) | ||
|---|---|---|---|
| Title | The crystal chemistry of oxo-mangani-leakeite and mangano-mangani-ungarettiite from the Hoskins mine and their impossible solid-solution: An XRD and FTIR study | ||
| Journal | Mineralogical Magazine | ||
| Authors | Oberti, Roberta | Author | |
| Ventura, Giancarlo Della | Author | ||
| Boiocchi, Massimo | Author | ||
| Zanetti, Alberto | Author | ||
| Hawthorne, Frank C. | Author | ||
| Year | 2017 (June) | Volume | 81 |
| Issue | 3 | ||
| Publisher | Mineralogical Society | ||
| DOI | doi:10.1180/minmag.2016.080.124Search in ResearchGate | ||
| Generate Citation Formats | |||
| Mindat Ref. ID | 244904 | Long-form Identifier | mindat:1:5:244904:7 |
| GUID | 0 | ||
| Full Reference | Oberti, Roberta, Ventura, Giancarlo Della, Boiocchi, Massimo, Zanetti, Alberto, Hawthorne, Frank C. (2017) The crystal chemistry of oxo-mangani-leakeite and mangano-mangani-ungarettiite from the Hoskins mine and their impossible solid-solution: An XRD and FTIR study. Mineralogical Magazine, 81 (3) 707-722 doi:10.1180/minmag.2016.080.124 | ||
| Plain Text | Oberti, Roberta, Ventura, Giancarlo Della, Boiocchi, Massimo, Zanetti, Alberto, Hawthorne, Frank C. (2017) The crystal chemistry of oxo-mangani-leakeite and mangano-mangani-ungarettiite from the Hoskins mine and their impossible solid-solution: An XRD and FTIR study. Mineralogical Magazine, 81 (3) 707-722 doi:10.1180/minmag.2016.080.124 | ||
| Abstract/Notes | AbstractNew chemical (EMP, SIMS) and structural data are reported for a suite of crystals of oxo-mangani-leakeite and mangano-mangani-ungarettiite from their common type locality, the Hoskins mine (New South Wales, Australia). Notwithstanding the low OH content, FTIR analysis of selected sampleshas provided considerable information on short-range order in these Mn3+-rich amphiboles, and shows that Li is associated with occupied A sites and is linked to the oxo-component at the O(3) site. Comparative analysis of all available data allows us to: (1) further improveour understanding of the crystal-chemistry of these very peculiar compositions of the oxo-amphibole group; and (2) calculate reliable site-populations. The proposed limited compositional variability has been confirmed. The two amphiboles have completely different arrangements of CR3+cations. In oxo-mangani-leakeites, those CR3+ cations related to the oxocomponent occur at the M (1) site, whereas those CR3+ cations related to the leakeite charge-arrangement occur at the M (2) site. In mangano-mangani-ungarettiite,all CR3+ cations order at the M (1) and M (3) sites, and local bond-valence requirements are satisfied by the presence of Mn3+, which assumes a strongly distorted coordination due to its degenerate eg electronic state. Therefore,the inverse patterns observed for both cation-ordering and deformation of the octahedra are incompatible with solid-solution between these two species that coexist at the Hoskins mine. | ||
| Mineral | Citation Details |
|---|---|
| Mangano-mangani-ungarettiite | |
| Oxo-mangani-leakeite |
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