NPL Aqueous Databases

MTAQ - The NPL Aqueous Database

This database is currently being developed as part of project RC156. This project, coordinated by the Mineral Industry Research Organisation (MIRO) follows on from earlier projects RC106 (feasibility study) and RC128 (H₂O-X binary systems). It is concerned with the further development of a database for industrial strength high temperature aqueous systems including transition elements. The resulting thermodynamic database makes it possible for the first time to calculate binary T-x phase diagrams for aqueous systems over a wide range of temperature and composition.

The latest round of this project, building of the results of earlier phases of the project, began in the summer of 2003 and focuses on ternary H₂O-X-Y systems with common anions. The anions selected by the sponsors will include chloride, sulphate and possibly nitrate.

For more information contact Hugh Davies.

AQDATA - The NPL Database for Ideal Aqueous Species

AQDATA contains data for over 450 aqueous species, including ionic and neutral complexes: elements, oxides, hydroxides, halides, sulphates, sulphites, nitrates, nitrites, phosphates and many more.

The database contains data valid only at room temperature and for dilute solutions.

HOTAQ - The NPL Database for Ideal Aqueous System 'Fe,Cr,Ni,C,S,H,O,/-'

HOTAQ database contains many data for iron, chromium and nickel with carbon and sulphur in dilute aqueous solution up to 573 K.

MTSPCRT - The MTDATA implementation of the SuperCrit Aqueous Database

The MTSPCRT database is the MTDATA implementation of the high temperature dilute aqueous solution database developed for use with the SuperCrit program. It has enthalpy, entropy and heat capacity data for 1335 aqueous species mixing ideally. The reference states have been made consistent with other MTDATA databases.

MTCHVAL - The MTDATA implementation of the ChemVal Aqueous Database

The MTCHVAL database is the MTDATA implementation of the ChemVal database which was developed during a European Union project. The database contains data valid only at room temperature and for dilute solutions of 1356 aqueous species for nuclear environmental modelling.