NPL Aqueous Databases
MTAQ - The NPL Aqueous
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 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
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