Entries by Gelu Costin

Mineralogy and Petrology: Clinopyroxene megacrysts from Marion Island, Antarctic Ocean: evidence for a late stage shallow origin

January 28, 2019 /0 Comments/in /by

Clinopyroxene megacrysts from Marion Island, Antarctic Ocean: evidence for a late stage shallow origin James Roberts, Keabetswe D. Lehong, Andries E. J. Botha, Gelu Costin, Frikkie C. De Beer, Willem J. Hoffman and Callum J. Hetherington Clinopyroxene megacrysts (up to 5 cm) from a scoria cone on Marion Island, Antarctic Ocean are zoned, with compositionally distinct low (Al + Ti) and high (Al + Ti) patches arranged haphazardly throughout crystals. […]

Nature Communications: Nb/Ta systematics in arc magma differentiation and the role of arclogites in continent formation

January 28, 2019 /0 Comments/in /by

Nb/Ta systematics in arc magma differentiation and the role of arclogites in continent formation Ming Tang, Cin-Ty A. Lee, Kang Chen, Monica Erdman, Gelu Costin and Hehe Jiang The surfaces of rocky planets are mostly covered by basaltic crust, but Earth is unique in that it also has extensive regions of felsic crust, manifested in […]

SEG Special Publications, Chapter 9: Anhydrite assimilation by ultramafic melts of the Bushveld Complex, and its consequences to petrology and mineralization

October 16, 2018 /0 Comments/in /by

Anhydrite assimilation by ultramafic melts of the Bushveld Complex, and its consequences to petrology and mineralization Yudovskaya, M.A., Sluzhenikin, S.F., Costin, G., Shatagin, K.N., Dubinina, E.O., Grobler, D.F., Ueckermann, H., and Kinnaird1, J.A. in “Metals, Minerals and Society”, Special Publication no. 21, Society of Economic Geologists, Chapter 9,  pp. 177-206 Abstract Sulfate assimilation by mafic to ultramafic […]

Chemistry of Materials: A non-van der Waals 2D Material from natural titanium mineral ore Ilmenite

August 21, 2018 /0 Comments/in /by

A non-van der Waals 2D Material from natural titanium mineral ore Ilmenite Puthirath Balan, A., Radhakrishnan, S., Kumar, R., Neupane, R., Sinha, S.K., Deng, L., de los Reyes, C.A., Apte, A., Rao, B.M., Paulose, M., Vajtai, R., Chu, C.W., Costin, G., Marti, A.A., Varghese, O.K., Singh, A.K., Tiwary, C.S., Anantharaman, M.R., Ajayan, P.M Chemistry of […]

Chemistry of Materials: Impurity controlled crystal growth in low dimensional bismuth telluride

August 16, 2018 /0 Comments/in /by

Impurity controlled crystal growth in low dimensional bismuth telluride Sharifi, T., Yazdi, S., Costin, G., Apte, A., Coulter, G., Tiwary, C., and Ajayan, P.M. Chemistry of Materials,  https://pubs.acs.org/doi/10.1021/acs.chemmater.8b02548 ABSTRACT Topological insulators, such as layered Bi2Te3, exhibit extraordinary properties, manifesting profoundly only at nanoscale thicknesses. However, it has been challenging to synthesize these structures with controlled thickness. […]

Advanced Materials Interfaces: Chromiteen: A New 2D Oxide Magnetic Material from Natural Ore

July 19, 2018 /0 Comments/in /by

Chromiteen: A New 2D Oxide Magnetic Material from Natural Ore Advanced Materials Interfaces, 2018, 1800549. Posted by Gelu Costin Thakur Prasad Yadav,* Sharmila N. Shirodkar, Narumon Lertcumfu, Sruthi Radhakrishnan, Farheen N. Sayed, Kirtiman Deo Malviya, Gelu Costin, Robert Vajtai, Boris I. Yakobson,* Chandra Sekhar Tiwary,* and Pulickel M. Ajayan* The absence of inherent magnetism in […]

Nature Nanotechnology: Exfoliation of a non-van der Waals material from iron ore hematite

July 19, 2018 /0 Comments/in /by

Exfoliation of a non-van der Waals material from iron ore hematite Nature Nanotechnology, volume 13, pages602–609 (2018), posted by Gelu Costin Aravind Puthirath Balan 1,2,11, Sruthi Radhakrishnan1,11, Cristiano F. Woellner 3, Shyam K. Sinha4, Liangzi Deng5, Carlos de los Reyes6, Banki Manmadha Rao7, Maggie Paulose7, Ram Neupane7, Amey Apte1, Vidya Kochat1, Robert Vajtai 1, Avetik R. Harutyunyan8, Ching-Wu Chu5,9, Gelu […]

Nature Communication: Platinum-bearing chromite layers are caused by pressure reduction during magma ascent

February 8, 2018 /0 Comments/in /by

Platinum-bearing chromite layers are caused by pressure reduction during magma ascent Rais Latypov 1, Gelu Costin 2, Sofya Chistyakova 1, Emma J. Hunt 1, Ria Mukherjee 1 & Tony Naldrett 3 1: School of Geosciences, University of the Witwatersrand, Johannesburg, 2050, South Africa; 2: Department of Earth, Environmental and Planetary Sciences, Rice University, Houston, 6100, TX, 77005, USA; 3: Department of […]