| Directory > Science > Earth Sciences > Geochemistry > Databases > Thermochemical 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.
http://jess.murdoch.edu.au
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MELTS Supplemental Calculator
Calculator for thermodynamic data in geological systems as a function of temperature, pressure, and
composition. User can select a mineral solid solution and provide either mole fractions or oxide
weight percentages, and specify desired temperature and pressure.
http://penmelts.ess.washington.edu/MeltsCALC/
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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.
http://www.webelements.com/
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Table of the Nuclides
Interactive map of the nuclides. Users can click to zoom in on a region of the table or enter a
specific nuclide manually. Data listed for individual nuclides include atomic mass, binding energy,
atomic abundance, parent/daughter nuclides (if applicable), and cross section values.
http://www2.bnl.gov/ton/
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CODATA Thermodynamic Values for Key Substances
Table of internationally agreed upon values coordinated by The Committee on Data for Science and
Technology. Includes the standard enthalpy of formation at 298.15 K, the entropy at 298.15 K, and
the quantity H°(298.15 K)-H°(0) for elements, ions, and compounds.
http://www.codata.org/databases/key1.html
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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.
http://www.me.berkeley.edu/gri-mech/data/thermo_table.html
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Thermodynamic Dataset for Rock-Forming Minerals
Summaries of experimental results for 253 mineral reactions involving 94 rock-forming minerals and
the fluid components H2O, CO2, and O2. Values are given for entropy and enthalpy of formation. The
dataset can also be downloaded as a complete file.
http://www.gfz-potsdam.de/pb4/pg1/dataset/
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OECD/NEA Thermochemical Data Base Project
International effort of the Nuclear Energy Agency, a sub-agency within the Organisation for
Economic Co-operation and Development. Chemical thermodynamic data on selected elements and
compounds of concern in radioactive waste disposal, particularly uranium, neptunium, plutonium,
americium, and technetium. Only Gibbs energies, enthalpies, entropies and heat capacities are
provided. Registration is required, and some areas of the website are restricted to group members
only.
http://www.nea.fr/html/dbtdb/cgi-bin/tdbdocproc.cgi
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NIST Chemistry WebBook
This National Institute of Standards and Technology website provides 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.
http://webbook.nist.gov/chemistry/
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