Vibrational Spectra of Ternary Rare Earth Sulfides in Relation to Crystal Structures,
Abstract
The role of bond length and coordination of a series of rare earth sulfides with the A2BS4 stoichiometry on vibrational spectra was investigated. Far infrared and Raman spectra have been measured on compounds with A = La, Ce, Nd, Pr; B = Ba, Sr, Pb, Ca (Th3P4 structure I(4 bar)3d; A = Gd to Lu, B = Ba, Sr, Eu(2+) (CaFe2O4 structure Pnam); and A = Ho, Er, Tm, Yb, Y; B = Zn, Mg, Cd (spinel structure Fd3m). Band frequencies shift uniformly with cell parameter and show discontinuous shifts to lower values as the coordination scheme is varied from 6-4 to 8-6 to 8-8.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 15, 1974
- Accession Number
- ADA008493
Entities
People
- Larry E. Drafall
- Paul L. Provenzano
- Steven I. Boldish
- William B. White
Organizations
- Pennsylvania State University