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dc.contributor.authorBindi, L
dc.contributor.authorZaccarini, F
dc.contributor.authorIfandi, E
dc.contributor.authorTsikouras, B
dc.contributor.authorStanley, Christopher
dc.contributor.authorGaruti, G
dc.contributor.authorMauro, D
dc.date.accessioned2020-10-15T12:42:32Z
dc.date.available2020-10-15T12:42:32Z
dc.date.issued2020-01-31
dc.date.submitted2020-10-14
dc.identifier.citationBindi, L.; Zaccarini, F.; Ifandi, E.; Tsikouras, B.; Stanley, C.; Garuti, G.; Mauro, D. Grammatikopoulosite, NiVP, a New Phosphide from the Chromitite of the Othrys Ophiolite, Greece. Minerals 2020, 10, 131.en_US
dc.identifier.doi10.3390/min10020131
dc.identifier.urihttp://hdl.handle.net/10141/622856
dc.description.abstractGrammatikopoulosite, NiVP, is a new phosphide discovered in the podiform chromitite and hosted in the mantle sequence of the Othrys ophiolite complex, central Greece. The studied samples were collected from the abandoned chromium mine of Agios Stefanos. Grammatikopoulosite forms small crystals (from 5 μm up to about 80 μm) and occurs as isolated grains. It is associated with nickelphosphide, awaruite, tsikourasite, and an undetermined V-sulphide. It is brittle and has a metallic luster. In plane-polarized light, it is creamy-yellow, weakly bireflectant, with measurable but not discernible pleochroism and slight anisotropy with indeterminate rotation tints. Internal reflections were not observed. Reflectance values of mineral in air (R1, R2 in %) are: 48.8–50.30 at 470 nm, 50.5–53.5 at 546 nm, 51.7–55.2 at 589 nm, and 53.2–57.1 at 650 nm. Five spot analyses of grammatikopoulosite give the average composition: P 19.90, S 0.41, Ni 21.81, V 20.85, Co 16.46, Mo 16.39, Fe 3.83, and Si 0.14, total 99.79 wt %. The empirical formula of grammatikopoulosite—based on Σ(V + Ni + Co + Mo + Fe + Si) = 2 apfu, and taking into account the structural results—is (Ni0.57Co0.32Fe0.11)Σ1.00(V0.63Mo0.26Co0.11)Σ1.00(P0.98S0.02)Σ1.00. The simplified formula is (Ni,Co)(V,Mo)P and the ideal formula is NiVP, which corresponds to Ni 41.74%, V 36.23%, P 22.03%, total 100 wt %. The density, calculated on the basis of the empirical formula and single-crystal data, is 7.085 g/cm3. The mineral is orthorhombic, space group Pnma, with a = 5.8893(8), b = 3.5723(4), c = 6.8146(9) Å, V = 143.37(3) Å3, and Z = 4. The mineral and its name have been approved by the Commission of New Minerals, Nomenclature and Classification of the International Mineralogical Association (IMA 2019-090). The mineral honors Tassos Grammatikopoulos, geoscientist at the SGS Canada Inc., for his contribution to the economic mineralogy and mineral deposits of Greece.en_US
dc.language.isoenen_US
dc.publisherMDPI AGen_US
dc.relation.urihttps://doi.org/10.3390/min10020131en_US
dc.rightsopenAccessen_US
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.titleGrammatikopoulosite, NiVP, a New Phosphide from the Chromitite of the Othrys Ophiolite, Greeceen_US
dc.typeJournal Articleen_US
dc.identifier.eissn2075-163X
dc.identifier.journalMineralsen_US
dc.identifier.volume10en_US
dc.identifier.issue2en_US
dc.identifier.startpage131 - 131en_US
pubs.organisational-group/Natural History Museum
pubs.organisational-group/Natural History Museum/Science Group
pubs.organisational-group/Natural History Museum/Science Group/Earth Sciences
pubs.organisational-group/Natural History Museum/Science Group/Earth Sciences/Economic and Environmental Earth Sciences
pubs.organisational-group/Natural History Museum/Science Group/Functional groups
pubs.organisational-group/Natural History Museum/Science Group/Functional groups/Scientific Associates
dc.embargoNot knownen_US
elements.import.authorBindi, Len_US
elements.import.authorZaccarini, Fen_US
elements.import.authorIfandi, Een_US
elements.import.authorTsikouras, Ben_US
elements.import.authorStanley, Cen_US
elements.import.authorGaruti, Gen_US
elements.import.authorMauro, Den_US
dc.description.nhmThis is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.en_US
dc.subject.nhmgrammatikopoulositeen_US
dc.subject.nhmphosphideen_US
dc.subject.nhmchromititeen_US
dc.subject.nhmAgios Stefanos mineen_US
dc.subject.nhmOthrysen_US
dc.subject.nhmophioliteen_US
dc.subject.nhmGreeceen_US
refterms.dateFOA2020-10-15T12:42:33Z


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