T.M. shaw, A. Gupta, et al.
Journal of Materials Research
A temperature dependent "soft" optic phonon is found in the ferroelectric Pb5Ge3O11. Other details of the optic phonons that transform as the totally symmetric irreducible representation also are reported. © 1972.
T.M. shaw, A. Gupta, et al.
Journal of Materials Research
A.W. Smith, G. Burns
Physics Letters A
U. Venkateswaran, K. Strössner, et al.
Solid State Communications
G. Burns, M.I. Nathan
Proceedings of the IEEE