Juraj Majzlan Erich Konigsberger Robert J. Bowell Charles N. Alpers Heather E. Jamieson D. Kirk Nordstrom Juraj Majzlan D. Kirk Nordstrom 2014 <p>Quantitative geochemical calculations are not possible without thermodynamic databases and considerable advances in the quantity and quality of these databases have been made since the early days of <span class="xref-bibr">Lewis and Randall (1923)</span>, <span class="xref-bibr">Latimer (1952)</span>, and <span class="xref-bibr">Rossini et al. (1952)</span>. <span class="xref-bibr">Oelkers et al. (2009)</span> wrote, “<i>The creation of thermodynamic databases may be one of the greatest advances in the field of geochemistry of the last century</i>.” Thermodynamic data have been used for basic research needs and for a countless variety of applications in hazardous waste management and policy making (<span class="xref-bibr">Zhu and Anderson 2002</span>; <span class="xref-bibr">Nordstrom and Archer 2003</span>; <span class="xref-bibr">Bethke 2008</span>; <span class="xref-bibr">Oelkers and Schott 2009</span>). The challenge today is to evaluate thermodynamic data for internal consistency, to reach a better consensus of the most reliable properties, to determine the degree of certainty needed for geochemical modeling, and to agree on priorities for further measurements and evaluations.</p> application/pdf 10.2138/rmg.2014.79.4 en Mineralogical Society of America; The Geochemical Society Thermodynamic properties for arsenic minerals and aqueous species chapter