 | | Journal (article/letter/editorial) | | homogeneous distribution of crystals (probably magnetite) with sizes in the range of 10 to 50 nm. No significant...method, and the following equation, presented by Neuville and Richet (1991), was applied to calculate the...with the viscosity results on andesitic melts of Neuville et al. (1993) and Richet et al. (1996). For a...crystalline phases in the anhydrous samples include magnetite. This is in agreement with observations from Regnard... who investigated the magnetic properties of magnetite crystals with similar grain sizes in oxidized |  | | Journal (article/letter/editorial) | | Kasteelpark Arenberg 44, box 2450, B-3001 Heverlee, Belgium a r t i c l e i n f o Article history: Received...Phase field model Silicate melt Crystal growth Magnetite Oxidation Lava a b s t r a c t In this work,...xFe2O3 = 0.2. Moreover, this reducing effect of magnetite precipitation has been observed experimentally...above the melt. The counteracting effect of the magnetite crystallization (reducing) and atmosphere oxygen...the atmosphere, due to the crystallization of magnetite. 4.3. Effect of oxygen potential in atmosphere |  | Le Losq, Charles, Moretti, Roberto, Oppenheimer, Clive, Baudelet, François, Neuville, Daniel R. (2020) In situ XANES study of the influence of varying temperature and oxygen fugacity on iron oxidation state and coordination in a phonolitic melt. Contributions to Mineralogy and Petrology, 175 (7). doi:10.1007/s00410-020-01701-4 | Journal (article/letter/editorial) | | coordination changes in triggering crystallisation of magnetite nanolites upon magma ascent, and, through such...few %) microlites of olivine, clinopyroxene, magnetite and apatite, all held within a glassy matrix....from 500 up to 2000 K with a precision of ± 10 K (Neuville et al. 2014 and references therein). The furnace...addition to other suspected controls such as magnetite precipitation (Oppenheimer et al. 2011) and possibly...formers in the melt structure (e.g. Le Losq and Neuville 2017), DO2 directly relates to the diffusivity |  | | Journal (issue) | | provenances of lithic materials during Roman times in Belgium: a fruitful collaboration between geologists and...Vynckier, Flanders Heritage Agency, Brussels, Belgium. Mosaic, Roman house, Hondsstraat Tongeren. © Copyright...Géologique de Belgique Rue Jenner 13 B-1000 Bruxelles, Belgium Tel: +32 2 7887636 info.efg@eurogeologists.eu www...Goemaere , D. Pacyna , S. Pirson and P. Spagna In Wallonia, Earth Sciences specialists contribute to the...partes involucradas. I n Wallonia, a French-speaking region in south Belgium, archaeologists employed |  | Le Losq, Charles, Berry, Andrew J., Kendrick, Mark A., Neuville, Daniel R., O'Neill, Hugh St. C. (2019) Determination of the oxidation state of iron in Mid-Ocean Ridge basalt glasses by Raman spectroscopy. American Mineralogist, 104 (7) 1032-1042 doi:10.2138/am-2019-6887 | Journal (article/letter/editorial) | | in log units relative to the quartz-fayalite-magnetite, QFM, buffer) for ~24 h before quenching in water...1400 °C, and relative to the quartz-fayalite-magnetite (QFM) buffer, of MORB glass standards (Berry et...1990; Neuville and Mysen 1996; Neuville et al. 2004, 2008; Neuville 2006; Le Losq and Neuville 2013;...normalised cate glasses (Neuville and Mysen 1996; Mysen et al. 2003; Le Losq and Neuville 2013). This assignment...their comments. References cited Amalberti, J., Neuville, D.R., Sarda, P., Sator, N., and Guillot, B. (2011) |  | | Journal (article/letter/editorial) | | properties of rhyolite and andesite melts Daniel R. Neuville 1, Philippe Courtial 1, Donald B. Dingwell 2,...(Adam and Gibbs 1965; Richet 1984; Richet and Neuville 1992), which provides a firm theoretical framework...Urbain et al. 1982; Riehet and Bottinga 1984b, Neuville and Richet 1991). Experimental methods The rhyolite...(1990b), and with the creep apparatus described by Neuville and Richet (1991). Within the range of stresses...suggests that the inclusions consist primarily of magnetite, as those previously observed by Regnard et al |  | | Journal (article/letter/editorial) | | spectral response of RI both crystal free and magnetite nanolite bearing glasses spanning basaltic to...of nanotilization is not purely restricted to magnetite nanolites but that Raman spectroscopy may also...(2017a), documented how the presence of PT magnetite nano-crystals, termed nanolites, can alter the...spectral feature related to the presence of RI magnetite nanolites. We then introduce a new index termed...nanolite on Raman spectra was studied using six magnetite-nanolite bearing glasses of different composition |  | Nienhuis, Emily T., Marcial, José, Robine, Thibaut, Le Losq, Charles, Neuville, Daniel R., Stennett, Martin C., Hyatt, Neil C., McCloy, John S. (2020) Effect of Ti4+ on the structure of nepheline (NaAlSiO4) glass. Geochimica et Cosmochimica Acta, 290. 333-351 doi:10.1016/j.gca.2020.09.015 | Journal (article/letter/editorial) | | Marcial, Thibaut Robine, Charles Le Losq, Daniel R. Neuville, Martin C. Stennett, Neil C. Hyatt, John S. McCloy...Nienhuis, E.T., Marcial, J., Robine, T., Le Losq, C., Neuville, D.R., Stennett, M.C., Hyatt, N.C., McCloy, J...coefficient and its isotopic fractionation for magnetite and other Ti-bearing minerals should be fairly...obsidians to ~16 wt% in lunar glasses (Cicconi and Neuville, 2019), though in the latter, Ti3+ can be present...coordination and subsequent structural role (Mysen and Neuville, 1995). A good assessment of Ti coordination and |  | Le Losq, Charles, Neuville, Daniel R., Moretti, Roberto, Kyle, Philip R., Oppenheimer, Clive (2015) Rheology of phonolitic magmas – the case of the Erebus lava lake. Earth and Planetary Science Letters, 411. 53-61 doi:10.1016/j.epsl.2014.11.042 | Journal (article/letter/editorial) | | Erebus lava lake Charles Le Losq a,∗ , Daniel R. Neuville a , Roberto Moretti a,b,c,d , Philip R. Kyle e...Viscosities of rhyolite and andesite melts from Neuville et al. (1993) and a basalt melt from Villeneuve...%) microphenocrysts of olivine, clinopyroxene, magnetite and apatite, typical of the lava bombs ejected...35 10.05 9.58 9.18 (log Pa s) Neuville and Richet (1991) and Neuville (2006). Measurements carried out...better than 0.03 log units with this apparatus (see Neuville, 2006). We measured the viscosity by changing |  | WANG, Ling, YOSHIASA, Akira, OKUBE, Maki, HIRATOKO, Tatsuya, HU, Yuan, ARIMA, Hiroshi, SUGIYAMA, Kazumasa (2013) Local structure of iron in tektites and natural glass: An insight through X-ray absorption fine structure spectroscopy. Journal of Mineralogical and Petrological Sciences, 108 (5) 288-294 doi:10.2465/jmps.130212 | Journal (article/letter/editorial) | | standard minerals such as hematite, fayalite, and magnetite were compared. The degree of oxidation was measured...McMillan, 1989; Paris et al., 1994; Mysen and Neuville, 1995; Yarger et al., 1995). XAFS method is an...(pseudotachylite) have been studied for comparison. Fayalite, magnetite, and hematite as the most common iron compounds...00-0.99) (Berry, 2003) and chemical shift in magnetite and maghemite (Okudera et al., 2012) have been...Society of Japan, 56, 27772787. Mysen, B. and Neuville, D. (1995) Effect of temperature and TiO2 content |  | | Journal (article/letter/editorial) | | silicate glasses FRANÇOIS FARGES,1,* DANIEL R. NEUVILLE,2 AND GORDON E. BROWN JR.3 2 1 Laboratoire des...SiO2, Al2O3, and CaCO3 in the desired amounts (Neuville 1992) (Fig. 1). The powders were slowly decarbonated...analyses done at the CAMPARIS, Paris. Data from Neuville (1992). Errors (2σ) are in parentheses. † Values...thermodynamic and Raman scattering information (Neuville et al. 1994). Higher Al-coordinations (five or...crystal/ liquid partitioning of Ru, Rh and Pd for magnetite and hematite solid solutions crystallized from |  | | Journal (article/letter/editorial) | | al. (2012) found microcrystals of feldspar and magnetite in the rhyolite ground mass. Thermal diffusivity...and of nearly endmember magnetite is 2.04 mm2/s (Hofmeister 2007). Magnetite would elevate D, but this...(1982) provide constant ρ and CP for SiO2 melt. Neuville et al. (1993) provide data for rhyolites. We also...minerals are interspersed. Octahedral shapes suggest magnetite, which exists in the obsidian. In one dissected...cristobalite beads while more feldspar crystallizes. Magnetite crystallites in the snowflakes were inherited |  | Villeneuve, Nicolas, Neuville, Daniel R., Boivin, Pierre, Bachèlery, Patrick, Richet, Pascal (2008) Magma crystallization and viscosity: A study of molten basalts from the Piton de la Fournaise volcano (La Réunion island) Chemical Geology, 256 (3) 242-251 doi:10.1016/j.chemgeo.2008.06.039 | Journal (article/letter/editorial) | | Réunion island) Nicolas Villeneuve a,⁎, Daniel R. Neuville b, Pierre Boivin c, Patrick Bachèlery d, Pascal...carbonate mixes as described in previous papers (e.g., Neuville and Richet, 1991). Its composition could not be...were made with the creep apparatus described by Neuville and Richet (1991) whereby the rate of deformation...0.04 log unit as found for static experiments (Neuville and Richet, 1991). Finally, high-temperature viscosities...similar to those described for molten andesite (Neuville et al., 1993) and basalt (Bouhifd et al., 2004) |  | | Journal (article/letter/editorial) | | 2003; Merzbacher et al., 1990; Cormier and Neuville, 2004; Neuville et al., 2006). This preference leads to...Toplis et al., 1997, 2000; Stebbins and Xue, 1997; Neuville et al., 2004; Mysen and Toplis, 2007) thus yielding...Toplis et al., 1997; Toplis and Dingwell, 2004; Neuville et al., 2004, 2006). It is possible, therefore...the melt (Merzbacher et al., 1990; Mysen, 1999; Neuville et al., 2004). The ionic radius, r, and electrical...Geochim. Cosmochim. Acta 52, 539–553. Cormier L. and Neuville D. R. (2004) Ca and Na environments in Na2O–CaO–Al2O3–SiO2 |  | | Journal (article/letter/editorial) | | petrology of magmatic systems (e.g., ilmenite and magnetite granitic series, Ishihara 2004; tholeitic vs....fugacity conditions equal to the quartz–fayalite–magnetite buffer (QFM), either at 1200 or at 1360 °C. In...associated with (AlO4)− tetrahedra (e.g., Hehlen and Neuville 2015; Cicconi et al. 2016). It might be expected...total alkali content A B 34 (e.g. Le Losq and Neuville 2013; Kjeldsen et al. 2014). If such mixed alkali...available as charge compensators (e.g. Le Losq and Neuville 2013; Cicconi et al. 2015, 2016). In any case |  | Dauphas, N., Roskosz, M., Alp, E.E., Neuville, D.R., Hu, M.Y., Sio, C.K., Tissot, F.L.H., Zhao, J., Tissandier, L., Médard, E., Cordier, C. (2014) Magma redox and structural controls on iron isotope variations in Earth's mantle and crust. Earth and Planetary Science Letters, 398. 127-140 doi:10.1016/j.epsl.2014.04.033 | Journal (article/letter/editorial) | | Dauphas a,∗ , M. Roskosz b , E.E. Alp c , D.R. Neuville d , M.Y. Hu c , C.K. Sio a , F.L.H. Tissot a ...Jordan and Young, 2014; Shahar et al., 2013), and magnetite–olivine (Shahar et al., 2008). For molten FeS–rhyolite..., 2014). For magnetite–olivine, the force constants used are 230 ± 6 N/m for magnetite (Dauphas et al...also reported a force constant of ∼228 N/m for magnetite using data previously published by Seto et al...two systems. The two approaches disagree for magnetite–olivine, where the predictions from force constant |  | | Journal (article/letter/editorial) | | prepared at the iron-wustite (IW) or quartz-fayalite-magnetite (QFM) buffers range from reduced to highly oxidized...used for low fO2 runs [fO2 < quartz-fayalite-magnetite (QFM)]. Fe solubility in the Re is low under the...in-house program from the University of Ghent, Belgium, called DIST_3E, which uses model-independent quadrupole...also been identified (Figs. 8c and 8d), although magnetite is not detected in Mössbauer measurements (detection...demonstrated by the EEL spectra in Figure 8b. Magnetite grains 50–100 nm Discussion Quantification of |  | | Journal (article/letter/editorial) | | Lee and Stebbins, 2006; Mysen and Toplis, 2007; Neuville et al., 2007; Lee and Stebbins, 2009; Le Losq...2007; Florian et al., 2007; Kelsey et al., 2008a; Neuville et al., 2008; Kelsey et al., 2009; Lee et al....et al., 2000; Toplis et al., 2000; Neuville et al., 2004b; Neuville et al., 2008; Thompson and Stebbins...around Al and O (Toplis et al., 2000; Neuville et al., 2004a; Neuville et al., 2004b) (see SI-4). Based on...amount of [5]Al is observed in the 2D spectra (Neuville et al., 2004b, 2006; Stebbins et al., 2008; Xue |  | | Journal (article/letter/editorial) | | fugacity regulated slightly below the fayalite–magnetite–quartz (FMQ) buffer. The mixed powder was then...in order to charge–balance the NBO (Cormier and Neuville, 2004). Therefore, this lengthening at lower pressure...shorter than the Fe(Mg)–BO distances (Cormier and Neuville, 2004). On the other hand, the Ca(Na)–O distances...Applied Physics, 86, 5801–5808. Cormier, L. and Neuville, D.R. (2004) Ca and Na environments in Na2O–CaO–Al2O3–SiO2 |  | Alderman, O.L.G., Wilding, M.C., Tamalonis, A., Sendelbach, S., Heald, S.M., Benmore, C.J., Johnson, C.E., Johnson, J.A., Hah, H.-Y., Weber, J.K.R. (2017) Iron K-edge X-ray absorption near-edge structure spectroscopy of aerodynamically levitated silicate melts and glasses. Chemical Geology, 453. 169-185 doi:10.1016/j.chemgeo.2017.01.020 | Journal (article/letter/editorial) | | (uncertainties in parentheses) relative to the fayalite-magnetite-β-quartz (FMQ) buffer. Remarkably, XANES preedge...and are also reported relative to the fayalite-magnetite-β-quartz (FMQ) buffer (Frost et al., 1988). Samples...multiphase crystalline nature of the fayalite-magnetite-quartz materials. Table 3 shows the Mössbauer...2004) and Al3+ in peraluminous glasses (Neuville et al., 2004 Neuville et al., 2006). As such, both ferric...glasses. Am. Mineral. 100, 1610–1619. Cochain, B., Neuville, D., De Ligny, D., Roux, J., Baudelet, F., Strukelj |  | Magnien, V., Neuville, D.R., Cormier, L., Mysen, B.O., Briois, V., Belin, S., Pinet, O., Richet, P. (2004) Kinetics of iron oxidation in silicate melts: a preliminary XANES study. Chemical Geology, 213 (1) 253-263 doi:10.1016/j.chemgeo.2004.08.047 | Journal (article/letter/editorial) | | 1 44 27 24 87. E-mail address: neuville@ipgp.jussieu.fr (D.R. Neuville). 0009-2541/$ - see front matter...experiments made with the creep apparatus described by Neuville and Richet (1991). An empirical TVF equation of...energy position and Fe3+/Fetot for fayalite, magnetite and hematite. This calibration is well suited...methods. Contrib. Mineral. Petrol. 90, 101 – 106. Neuville, D.R., Richet, P., 1991. Viscosity and mixing |  | Di Genova, Danilo, Sicola, Stefania, Romano, Claudia, Vona, Alessandro, Fanara, Sara, Spina, Laura (2017) Effect of iron and nanolites on Raman spectra of volcanic glasses: A reassessment of existing strategies to estimate the water content. Chemical Geology, 475. 76-86 doi:10.1016/j.chemgeo.2017.10.035 | Journal (article/letter/editorial) | | scattering intensity and temperature (Long, 1977; Neuville and Mysen, 1996) as it follows: I = Iobs ·⎧ν03·ν...analyses were performed on nanolite-bearing samples. Magnetite nanolites with diameters between ~5 nm to ~ 30...1007/s00410008-0363-4. Behrens, H., Roux, J., Neuville, D.R., Siemann, M., 2006. Quantification of dissolved...04.001. Di Genova, D., Morgavi, D., Hess, K.U., Neuville, D.R., Borovkov, N., Perugini, D., Dingwell, D...Kolzenburg, S., Vona, A., Chevrel, M.O., Hess, K.U., Neuville, D.R., Ertelingrisch, W., Romano, C., Dingwell |  | | Journal (article/letter/editorial) | | values defined by the magnetite-hematite (MH), Mn3O4-MnO (MM), NiO-Ni (NNO), magnetite-wustite (MW), and...1–2 orders of magnitude of the quartz-fayalite-magnetite, QFM, buffer, e.g., Mattioli and Wood 1986; O’Neill...buffers were magnetite-hematite (MH), Mn3O4-MnO (MM), nickel-nickel oxide (NNO), magnetite-wustite (MW)...McMillan et al. 1982, 1995; Matson et al. 1986; Neuville and Mysen 1996). Thus, the decreasing intensity...Melts—Properties and Structure, 549 p. Elsevier, New york. Neuville, D.R. and Mysen, B.O. (1996) Role of aluminum |  | Duan, Yunfei, Li, Xinyang, Sun, Ningyu, Ni, Huaiwei, Tkachev, Sergey N., Mao, Zhu (2018) Single-crystal elasticity of MgAl2O4-spinel up to 10.9 GPa and 1000 K: Implication for the velocity structure of the top upper mantle. Earth and Planetary Science Letters, 481. 41-47 doi:10.1016/j.epsl.2017.10.014 | Journal (article/letter/editorial) | | black lines: clinopyroxene (diopside) (Li and Neuville, 2010; Sang and Bass, 2014); brown lines: orthopyroxene...black lines: clinopyroxene (diopside) (Li and Neuville, 2010; Sang and Bass, 2014); brown lines: orthopyroxene..., 2004), and clinopyroxene (diopside) (Li and Neuville, 2010; Sang and Bass, 2014). Our modeling shows...Doraiswami, M.S., 1947. Elastic constants of magnetite, pyrite and chromite. Proc. Indian Acad. Sci....237–248. Kung, J., Li, B., Uchida, T., Wang, Y., Neuville, D., Liebermann, R.C., 2004. In situ measurements |  | Roskosz, M., Toplis, M. J., Neuville, D. R., Mysen, B. O. (2008) Amorphous materials: Properties, structure, and durability: Quantification of the kinetics of iron oxidation in silicate melts using Raman spectroscopy and assessment of the role of oxygen diffusion. American Mineralogist, 93 (11) 1749-1759 doi:10.2138/am.2008.2861 | Journal (article/letter/editorial) | | mAthieu roskosz,1,2,* michAel J. toplis,3 dAniel r. neuville,4 And bJorn o. mysen2 Laboratoire de Structure...oxidation of the melt leads to the formation of magnetite (Fe3O4) and pseudowollastonite (CaSiO3) (Cooper...Melt viscosity at 1450 °C has been measured by Neuville and Richet (1991) to be 0.77 Pa·s. The density...et Cosmochimica Acta, 21, 43–52. Cochain, B., Neuville, D.R., Magnien, V., Roskosz, M., Henderson, G...Spectroscopy, 275 p. McGraw-Hill, New york. Magnien, V., Neuville, D.R., Cormier, L., Mysen, B.O., Briois, V., Belin |
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