Synthesis of Sulfides with the Calcium Ferrite Structure,
Abstract
Ternary sulfides with the calcium ferrite structure can be synthesized by reacting the appropriate oxides or carbonates at temperatures of 900 to 1400C in an atmosphere of flowing H2S. Compounds synthesized include SrHo2S4, SrDy2S4, SrTm2S4, SrEr2S4, Eu(2+)Yb2S4, BaNd2S4, BaGd2S4 and BaYb2S4. Compounds were fine grained powders, light colored, and stable in air. They were characterized by measurement of unit cell dimensions and band gap. Precision x-ray powder data are presented. Increase in oxygen activity of the gas stream leads to formation of oxysulfides. Powder data for the oxysulfides are also presented. No single crystals could be grown in spite of repeated attempts by a variety of CVD, hydrothermal and flux techniques.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1974
- Accession Number
- ADA008492
Entities
People
- Larry E. Drafall
- William B. White
Organizations
- Pennsylvania State University