caa a22 4500 465791344 CHVBK 20180323112025.0 cr unu---uuuuu 170327e19900601xx s 000 0 eng 10.1007/BF00320968 doi (NATIONALLICENCE)springer-10.1007/BF00320968 Energetics of glasses in the system diopside-anorthite-forsterite [Elektronische Daten] [Alexandra Navrotsky, Papu Maniar, Richard Oestrike] Enthalpies of mixing in glasses in the experimentally accessible region of the system Di-An-Fo are generally less than 4 kJ/mol in magnitude. Enthalpies of mixing of liquids in this and in several other petrologically relevant melts are also small; thus, if magmas of different compositions mix isothermally, the heat released or absorbed can be neglected in any consideration of the thermal evolution of the magmas, unless melting or crystallization takes place. The enthalpy of vitrification of Mg2SiO4 (to form a hypothetical glass at 700°C) is estimated to be 61±4 kJ/mol, in contrast to the enthalpy of fusion at 1500°C, 89±12 kJ/mol (Navrotsky et al. 1989). This suggests an average difference in heat capacity (Δ C p) between liquid and crystal of 35 J/K. mol, half that estimated by Ghiorso and Carmichael (1980, 1987). Springer-Verlag, 1990 Navrotsky Alexandra Department of Geological and Geophysical Sciences, 98544, Princeton, NJ, USA aut Maniar Papu Department of Geological and Geophysical Sciences, 98544, Princeton, NJ, USA aut Oestrike Richard Department of Geological and Geophysical Sciences, 98544, Princeton, NJ, USA aut Contributions to Mineralogy and Petrology Springer-Verlag 105/1(1990-06-01), 81-86 0010-7999 105:1<81 1990 105 410 https://doi.org/10.1007/BF00320968 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00320968 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Navrotsky Alexandra Department of Geological and Geophysical Sciences, 98544, Princeton, NJ, USA aut NATIONALLICENCE 700 1- Maniar Papu Department of Geological and Geophysical Sciences, 98544, Princeton, NJ, USA aut NATIONALLICENCE 700 1- Oestrike Richard Department of Geological and Geophysical Sciences, 98544, Princeton, NJ, USA aut NATIONALLICENCE 773 0- Contributions to Mineralogy and Petrology Springer-Verlag 105/1(1990-06-01), 81-86 0010-7999 105:1<81 1990 105 410 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer