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2020
Helmy, Hassan M., Ballhaus, Chris, Fonseca, Raul O. C. 
ORCID: 0000-0002-0897-4884 and Leitzke, Felipe P.
(2020).
Concentrations of Pt, Pd, S, As, Se and Te in silicate melts at sulfide, arsenide, selenide and telluride saturation: evidence of PGE complexing in silicate melts?
Contrib. Mineral. Petrol., 175 (7).
NEW YORK:
SPRINGER.
ISSN 1432-0967
2017
Ballhaus, Chris, Fonseca, Raul O. C. ORCID: 0000-0002-0897-4884, Muenker, Carsten, Rohrbach, Arno, Nagel, Thorsten, Speelmanns, Iris M., Helmy, Hassan M., Zirner, Aurelia, Vogel, Antje K. and Heuser, Alexander ORCID: 0000-0003-3772-5534
(2017).
The great sulfur depletion of Earth's mantle is not a signature of mantle-core equilibration.
Contrib. Mineral. Petrol., 172 (8).
NEW YORK:
SPRINGER.
ISSN 1432-0967
Helmy, Hassan M. and Bragagni, Alessandro (2017). Platinum-group elements fractionation by selective complexing, the Os, Ir, Ru, Rh-arsenide-sulfide systems above 1020 degrees C. Geochim. Cosmochim. Acta, 216. S. 169 - 184. OXFORD: PERGAMON-ELSEVIER SCIENCE LTD. ISSN 1872-9533