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Tangeman et al. 2001
Tangeman, J.A., Phillips, B.L., Navrotsky, A., Weber, J.K.R., Hixson, A.D. and Key, T.S. (2001). Vitreous forsterite (Mg2SiO4): Synthesis, structure, and thermochemistry. Geophysical Research Letters 28: doi: 10.1029/2000GL012222. issn: 0094-8276.

Here we report the first synthesis of a forsterite (Mg2SiO4) composition glass as an essentially phase-pure bulk material. Under containerless conditions, with heterogeneous nucleation sites minimized, glass forms by cooling ca. 1 mm liquid Mg2SiO4 droplets in oxygen at 700 K/s. 29Si NMR spectroscopic data indicate that the SiO4 tetrahedra and MgO6 octahedra exist in a corner sharing arrangement in the glass, but upon crystallization the polyhedral units reorganize to form edge-sharing linkages. Transposed temperature drop calorimetry shows that the glass is 61.4¿1.3 kJ/mol higher in enthalpy than the crystal. ¿ 2001 American Geophysical Union

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Abstract

Keywords
Mineralogy and Petrology, Experimental mineralogy and petrology, Mineralogy and Petrology, Igneous petrology, Mineral Physics, NMR, Mossbauer spectroscopy, and other magnetic techniques, Mineral Physics, Physical thermodynamics
Journal
Geophysical Research Letters
http://www.agu.org/journals/gl/
Publisher
American Geophysical Union
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