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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.
E.A. Giess, B.A. Scott, et al.
Materials Research Bulletin
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Physica C: Superconductivity and its applications
G. Burns, J.D. Axe
Physics Letters
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Materials Research Society Symposium - Proceedings