1. ASTM Designation E157-63, 1975 Book of ASTM Standards, Part 11, American Society for Testing and Materials, Philadelphia, p 286 (1975).
2. W.B. Pearson,Handbook of Lattice Spacings and Structures of Metals and Alloys, Pergamon, NY, Vol. 1 (1958) and Vol. 2 (1967).
3. “Crystal Data Determinative Tables,” 3rd ed., U.S. Department of Commerce, National Bureau of Standards and the JCPDS-International Centre for Diffraction Data, Swarthmore, PA, USA, Vol. 2 (1973).
4. “International Tables for X-Ray Crystallography,” 3rd ed., Kynoch Press, Birmingham, Vol. I (1969).
5. NBS Tech.;A. D. Mighell,1981