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This category is for databases containing thermodynamic and other chemical data on elements and compounds of interest to researchers in all fields of geochemistry.
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WebElements Periodic Table of the Elements - Interactive periodic table. Clicking on an element brings up a list of general properties and data, and information on its discovery, history, uses, geologic occurrence and abundance, compounds and chemical isolation. NIST Chemistry WebBook - This National Institute of Standards and Technology website with thermochemical, thermophysical, and ion energetics data. Information and data on gas-phase ion, organic, and organometallic thermochemistry, as well as thermophysical properties of selected fluid systems. Thermodynamic Database - Molar heat capacity, entropy, and standard enthalpy of formation values for selected elements and compounds. Data are given at 100 degree intervals from 200 to 3000 K, and also summarized for all species at 298 K. Joint Expert Speciation System - Thermochemical database for modelling aqueous solution chemistry, including more than 230,000 critically-assessed equilibrium constants and enthalpies for about 70,000 reactions.
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