“…The structure of some AIIBIVCV compounds was thoroughly studied by Pfister (1958Pfister ( , 1963, Folberth & Pfister (1957), Goodman (1957), Strauss & Rosenberg (1961), Gasson, Holmes, Jennings, Marathe & Parrott (1962), Leroux-Hugon (1963), Goriunova, Mamaev & Protchuchan (1962), Goriunova, Sokolova & Tsian Bin-Si (1963) and Tsian Bin-Si, Titchina, Osmanov & Goriunova (1963).…”