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
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
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
The database contains data valid only at room temperature and for
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