1. JCPDS, International Centre for Diffraction Data, Swarthmore, PA.
2. Optical Properties of Artificial Minerals;Winchell,1964
3. Review: The chemistry of dicalcium silicate mineral;Surendra Ghosh;J. Mater. Sci.,1979
4. Elements of Crystallography and Mineralogy;Wade,1960
5. Optical Properties of Artificial Minerals;Newton Winchell,1964