Some years after the publication of Vol. III/11 and its
supplement III/18 dealing with elastic, piezoelectric,
pyroelectric and optical properties of crystals, a complete
recompilation of the data of these volumes and of new data
was performed. Because of the growth of this subject matter
it was found convenient to divide the material into four
volumes, III/29a and b forthe low frequency properties and
III/30a and b for high frequency propertiesof dielectric
crystals. The first subvolume III/29a, already published in
1992, contains exclusively second and higher order elastic
constants including temperature and pressure coefficients.
The present second subvolume III/29b essentially contains
relative dielectric constants and piezoelectric constants
and their temperature coefficients, as well as
electrostrictive and pyroelectric coefficients and
electromechanical coupling factors of dielectric crystals.
The data are given in numerous tables and figures, the
latter mostly showing temperature and compositional
dependences. An alphabetical index for all substances of
both subvolumes listed according to their element systems
and furthermore an index of chemical, mineralogical, and
technical names help the reader to find data.

Contributions by: A.S. Bhalla, W.R.Jr. Cook, S.T. Liu