Database on the phase diagrams of semiconductor systems "Diagram"

A database "Diagram" contains information on tens of the most important pressure-temperature-concentration phase diagrams of semiconducting systems evaluated by qualified experts and also on the physical-chemical properties of the intermediate phases. The figures of the diagrams are only presented after critical assessment, statistical optimization (using expert evaluation of the data of different researchers) or thermodynamic self-consistency. The DB "Diagram" includes detailed analytical reviews for each system - mini-monographs of a sort - that reflect the extent of investigation of the system. Thermodynamic parameters and computational models, which were utilized for thermodynamic self-consistency or statistical optimization of data of the different investigators, are stored separately. Apart from information about semiconducting systems, this DB contains data about crystal structures of the chemical elements.

DB was included into State Register of databases (Registration N.943, December 29, 2001).

DB has Internet-access: https://diag.imet-db.ru.

Database on substances with significant acousto-optical, electro-optical and nonlinear optical properties "Crystal"

A database "Crystal" contains information on the most important substances of this class as evaluated by experts. The information contained in the database about the properties of the crystals is:

• tables of values physical and chemical properties of substances (temperature of phase transitions, density, hardness, solubility in various solvents, heat capacity at various temperatures, lattice parameters at various temperatures, etc.);
• tables of values of functional properties (electro-optical, nonlinear optical, elasto-optical coefficients, acousto-optical parameters, elastic constants, etc.).

In addition, the database includes extensive graphical information about the properties of the substances and detailed analytical reviews for each substance. At present the data on more than one hundred of the substances are stored in this database. In addition to a DB in Russian, a version in English has also been developed.

DB was included into State Register of databases (Registration N.944, December 29, 2001).

A version of this DB for Internet-users was made: https://crystal.imet-db.ru.

Database on properties of inorganic compounds "Phases"

A DB on the properties of inorganic compounds "Phases" contains now the following information on more than 50, 000 ternary more than 35, 000 quaternary compounds. Information was extracted from more than 20, 000 publications.

DB contains the following information about compounds: the region of homogeneity of compound, type of melting and melting point (at 1 atm), boiling point and decomposition in solid or vapor phase (at 1 atm), type of crystal structure with the indicating of temperature and pressure of existence of the given crystal modification, class system, space group, Z, critical temperature of transition to superconducting state and upper critical magnetic field at 4.2 K. DB contains the brief information for each system: temperatures of the investigated isothermal sections and designations of known quasibinary sections. The relevant bibliographic references are given for each ternary system.

DB was included into State Register of databases (Registration N. 1071, December 16, 1996).

A version of this DB for Internet-users was made: https://phase.imet-db.ru.

Database on width of forbidden zone of inorganic substances "Bandgap"

The database covers values of width of forbidden zone of the major classes of thousands inorganic substances. The database contains information on methods of bandgap determination and the appro-priate temperature ranges. The data on chemical and phase composition of materials, type of a crystal lattice (crystal system, structural type, space group), orientations of samples at optical measurements are given in addition. The all data are provided with references. Database includes the extensive graphical information about dependences of bandgap on various factors.

DB has Internet-access: https://bg.imet-db.ru.

Database on properties of chemical elements "Elements"

Database "Elements" contains information about more than 90 properties of chemical elements.

DB contains the following information about elements: size parameters, thermal, thermodynamic, mechanical, electrical, magnetic, etc. properties. The all data are provided with references.

DB has Internet-access: https://phase.imet-db.ru/elements.

Database of information resources on inorganic chemistry and materials science "IRIC"

Database IRIC contains brief data about information systems in inorganic chemistry and materials science. Data were extracted from papers.

DB has Internet-access: https://en.iric.imet-db.ru.