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dc.contributor.authorZaccarini, F
dc.contributor.authorBINDI, LUCA
dc.contributor.authorIfandi, Elena
dc.contributor.authorGrammatikopoulos, Tassos
dc.contributor.authorStanley, Christopher
dc.contributor.authorGaruti, G
dc.contributor.authorMauro, Daniela
dc.date.accessioned2020-03-25T16:32:10Z
dc.date.available2020-03-25T16:32:10Z
dc.date.issued2019-04-24
dc.date.submitted2019-05-01
dc.identifier.citationZaccarini, F.; Bindi, L.; Ifandi, E.; Grammatikopoulos, T.; Stanley, C.; Garuti, G.; Mauro, D. Tsikourasite, Mo3Ni2P1+x (x < 0.25), a New Phosphide from the Chromitite of the Othrys Ophiolite, Greece. Minerals 2019, 9, 248en_US
dc.identifier.doi10.3390/min9040248
dc.identifier.urihttp://hdl.handle.net/10141/622656
dc.description.abstractTsikourasite, Mo3Ni2P1+x (x < 0.25), is a new phosphide discovered in a mantle-hosted podiform chromitite collected in the abandoned mine of Agios Stefanos (Othrys ophiolite), Central Greece. It forms tiny grains (from a few μm up to about 80 μm) and occurs as isolated grains or associated with other known minerals such as nickelphosphide and awaruite, and with undetermined minerals such as Ni-allabogdanite or Ni-barringerite and a V-sulphide. Tsikourasite is brittle and has a metallic luster. In plane-polarized light, tsikourasite is white yellow and it shows no bireflectance, anisotropism or pleochroism. Internal reflections were not observed, Reflectance values of tsikourasite in air (Rin %) are: 55.7 at 470 nm, 56.8 at 546 nm, 57.5 at 589 nm and 58.5 at 650 nm. Five spot analyses of tsikourasite give the average composition: P 7.97, S 0.67, V 14.13, Fe 14.37, Co 7.59, Ni 23.9, and Mo 44.16, total 99.60 wt%, corresponding to the empirical formula (Mo1.778V1.071Fe0.082Co0.069)Σ3.000(Ni1.572Co0.428)Σ2.000(P0.981S0.079)Σ1.060, on the basisof Σ(Mo +V + Fe + Co + Ni) = 5 apfu and taking into account the structural results. The simplified formula is Mo3Ni2P1+x (x < 0.25). The density, which was calculated based on the empirical formula and single-crystal data, is 9.182 g/cm3. The mineral is cubic, space group F-43m, with a = 10.8215(5) Å and Z = 16. Although tsikourasite is similar in composition to those of monipite (MoNiP), polekhovskyite (MoNiP2), and the synthetic compound MoNiP2, all these phases are hexagonal and not cubic like tsikourasite. It exhibits the same structure as the cubic Mo3Ni2P1.18 compound [space group F-43m, a = 10.846(2) Å] synthesized at 1350 °C. The mineral and its name have been approved by the Commission of New Minerals, Nomenclature and Classification of the International Mineralogical Association (No. 2018-156). The mineral honors Professor Basilios Tsikouras of the Universiti Brunei Darussalam.en_US
dc.language.isoenen_US
dc.publisherMDPI AGen_US
dc.rightsopenAccessen_US
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.titleTsikourasite, Mo3Ni2P1+x (x < 0.25), 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.volume9en_US
dc.identifier.issue4en_US
dc.identifier.startpage248 - 248en_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.authorZaccarinien_US
elements.import.authorBindien_US
elements.import.authorIfandien_US
elements.import.authorGrammatikopoulosen_US
elements.import.authorStanleyen_US
elements.import.authorGarutien_US
elements.import.authorMauroen_US
dc.description.nhm© 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).en_US
dc.subject.nhmtsikourasiteen_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.dateFOA2020-03-25T16:32:11Z


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