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Preface to the special issue: ‘Protons in Minerals’

¹ Department of Earth Sciences, Oxford University, Parks Road, Oxford OX1 3PR, UK
² Department of Mineralogy, The Natural History Museum, Cromwell Road, London SW7 5BD, UK
³ Royal Institution of Great Britain, Albermarle Street, London W1S 4BS, UK
⁴ Department of Geological Sciences, University College London, Gower Street, London WC1E 6BT, UK

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Many minerals contain water, primarily in the form of molecular H₂O or as hydroxyl OH groups. The bonding characteristics of H can influence properties, such as electrical conductivity, compressibility and, in a wider context, mineral stability as a function of pressure, temperature and composition. Of particular interest geologically is the ability of mantle minerals to act as a significant reservoir for water. Over the past three decades a new picture has emerged of the distribution of water (H₂O and OH) in the Earth. The main water budget is no longer found to be restricted to the oceans and atmosphere, but is likely to be concentrated in the Earth’s mantle. Water is exchanged between the Earth’s surface and . . . [Full Text of this Article]