Barkov, Andrei Y., Tolstykh, Nadezhda D., Tamura, Nobumichi, Martin, Robert F., McDonald, Andrew M., Cabri, Louis J. (2021) Ferrotorryweiserite, Rh5Fe10S16, a New Mineral Species from the Sisim Placer Zone, Eastern Sayans, Russia, and the Torryweiserite–Ferrotorryweiserite Series. Minerals, 11 (12) 1420 doi:10.3390/min11121420
| Reference Type | Journal (article/letter/editorial) | ||
|---|---|---|---|
| Title | Ferrotorryweiserite, Rh5Fe10S16, a New Mineral Species from the Sisim Placer Zone, Eastern Sayans, Russia, and the Torryweiserite–Ferrotorryweiserite Series | ||
| Journal | Minerals | ||
| Authors | Barkov, Andrei Y. | Author | |
| Tolstykh, Nadezhda D. | Author | ||
| Tamura, Nobumichi | Author | ||
| Martin, Robert F. | Author | ||
| McDonald, Andrew M. | Author | ||
| Cabri, Louis J. | Author | ||
| Year | 2021 (December 15) | Volume | 11 |
| Page(s) | 1420 | Issue | 12 |
| Publisher | MDPI AG | ||
| URL | |||
| Download URL | https://www.mdpi.com/2075-163X/11/12/1420/pdf?version=1639712606 | ||
| DOI | doi:10.3390/min11121420Search in ResearchGate | ||
| Classification | Not set | LoC | Not set |
| Mindat Ref. ID | 13421237 | Long-form Identifier | mindat:1:5:13421237:3 |
| GUID | 9f360ee0-4a7e-4ebd-9853-cd02190131a6 | ||
| Full Reference | Barkov, Andrei Y., Tolstykh, Nadezhda D., Tamura, Nobumichi, Martin, Robert F., McDonald, Andrew M., Cabri, Louis J. (2021) Ferrotorryweiserite, Rh5Fe10S16, a New Mineral Species from the Sisim Placer Zone, Eastern Sayans, Russia, and the Torryweiserite–Ferrotorryweiserite Series. Minerals, 11 (12) 1420 doi:10.3390/min11121420 | ||
| Plain Text | Barkov, Andrei Y., Tolstykh, Nadezhda D., Tamura, Nobumichi, Martin, Robert F., McDonald, Andrew M., Cabri, Louis J. (2021) Ferrotorryweiserite, Rh5Fe10S16, a New Mineral Species from the Sisim Placer Zone, Eastern Sayans, Russia, and the Torryweiserite–Ferrotorryweiserite Series. Minerals, 11 (12) 1420 doi:10.3390/min11121420 | ||
| In | (2021, December) Minerals Vol. 11 (12) MDPI AG | ||
| Abstract/Notes | Ferrotorryweiserite, Rh5Fe10S16, occurs as small grains (≤20 µm) among droplet-like inclusions (up to 50 μm in diameter) of platinum-group minerals (PGM), in association with oberthürite or Rh-bearing pentlandite, laurite, and a Pt-Pd-Fe alloy (likely isoferroplatinum and Fe-Pd-enriched platinum), hosted by placer grains of Os-Ir alloy (≤0.5 mm) in the River Ko deposit. The latter is a part of the Sisim placer zone, which is likely derived from ultramafic units of the Lysanskiy layered complex, southern Krasnoyarskiy kray, Russia. The mineral is opaque, gray to brownish gray in reflected light, very weakly bireflectant, not pleochroic to weakly pleochroic (grayish to light brown tints), and weakly anisotropic. The calculated density is 5.93 g·cm–3. Mean results (and ranges) of four WDS analyses are: Ir 18.68 (15.55–21.96), Rh 18.34 (16.32–20.32), Pt 0.64 (0.19–1.14), Ru 0.03 (0.00–0.13), Os 0.07 (0.02–0.17), Fe 14.14 (13.63–14.64), Ni 13.63 (12.58–14.66), Cu 4.97 (3.42–6.41), Co 0.09 (0.07–0.11), S 29.06 (28.48–29.44), and total 99.66 wt.%. They correspond to the following formula calculated for a total of 31 atoms per formula unit: (Rh3.16Ir1.72Pt0.06Ru0.01Os0.01)Σ4.95(Fe4.48Ni4.11Cu1.38Co0.03)Σ10.00S16.05. The results of synchrotron micro-Laue diffraction studies indicate that ferrotorryweiserite is trigonal; its probable space group is R3¯m (#166) based on its Ni-analog, torryweiserite. The unit-cell parameters refined from 177 reflections are a = 7.069 (2) Å, c = 34.286 (11) Å, V = 1484 (1) Å3, and Z = 3. The c:a ratio is 4.8502. The strongest eight peaks in the X-ray diffraction pattern derived from results of micro-Laue diffraction study [d in Å(hkil)(I)] are 2.7950 (202¯5) (100); 5.7143 (0006) (60); 1.7671 (224¯0) (44.4); 3.0486 (202¯1) (39.4); 5.7650 (101¯2) (38.6); 2.5956 (202¯7) (37.8); 3.0058 (112¯6) (36.5); and 1.5029 (42¯ 2¯12) (35.3). Ferrotorryweiserite and the associated PGM crystallized from microvolumes of residual melt at late stages of crystallization of grains of Os- and Ir-dominant alloys occurred in lode zones of chromitites of the Lysanskiy layered complex. In a particular case, the residual melt is disposed peripherally around a core containing a disequilibrium association of magnesian olivine (Fo72.9–75.6) and albite (Ab81.6–86.4), with the development of skeletal crystals of titaniferous augite: Wo40.8–43.2En26.5–29.3Fs20.3–22.6Aeg6.9–9.5 (2.82–3.12 wt.% TiO2). Ferrotorryweiserite represents the Fe-dominant analog of torryweiserite. We also report occurrences of ferrotorryweiserite in the Marathon deposit, Coldwell Complex, Ontario, Canada, and infer the existence of the torryweiserite–ferrotorryweiserite solid solution in other deposits and complexes. | ||
References Listed
These are the references the publisher has listed as being connected to the article. Please check the article itself for the full list of references which may differ. Not all references are currently linkable within the Digital Library.
| Barkov (2021) Eur. J. Miner. Ferrotorryweiserite, IMA 2021-055. CNMNC Newsletter 64 33 | |
| Torryweiserite, IMA 2020-048http://cnmnc.main.jp/Newsletter_58_EJM.pdf | |
 | McDonald, Andrew M., Kjarsgaard, Ingrid M., Cabri, Louis J., Ross, Kirk C., Ames, Doreen E., Bindi, Luca, Good, David J. (2021) Oberthürite, Rh3(Ni,Fe)32S32 and torryweiserite, Rh5Ni10S16, two new platinum-group minerals from the Marathon deposit, Coldwell Complex, Ontario, Canada: Descriptions, crystal-chemical considerations, and comments on the geochemistry of rhodium. The Canadian Mineralogist, 59 (6) 1833-1863 doi:10.3749/canmin.2100014 |
 | Ames, D.E., Kjarsgaard, I.M., McDonald, A.M., Good, D.J. (2017) Insights into the extreme PGE enrichment of the W Horizon, Marathon Cu-Pd deposit, Coldwell Alkaline Complex, Canada: Platinum-group mineralogy, compositions and genetic implications. Ore Geology Reviews, 90. 723-747 doi:10.1016/j.oregeorev.2017.03.018 |
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| Kuvaevite, IMA 2020-043http://cnmnc.main.jp/Newsletter_58_EJM.pdf | |
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Map of Localities
Locality Pages
| Locality | Citation Details |
|---|---|
| River Ko placer deposit, Sisim Placer Zone, Lysanskiy dunite-peridotite-gabbro complex, Krasnoyarsk Krai, Russia |
Mineral Pages
| Mineral | Citation Details |
|---|---|
| Ferrotorryweiserite | |
| IMA2021-055 | |
| Kuvaevite Group | |
| Pentlandite Supergroup |
Mineral Occurrences
See Also
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