'Correspondence re felspars.' Some papers in Russian and German. File includes notes on the influence of impurity of rubidium on A1-Si order in potash felspar (1965?). Correspondents include:
Daniel E Appleman, 1962, re anorthite and 1972, re buddingtonite;
Mr B B Baschkin, 1962;
Bill Brown, Manchester University, 1962-4, re structure of anorthite, a plagioclase felspar;
Dr O H J Christie, 1962;
Joan R Clark;
W J Cruickshank;
Gai [Gabrielle Donnay?], 1959, re silicates;
Thomas W Donnelly;
Alfred J Frueh;
Theo Hahn, 1962;
Gilbert N Hanson;
John B Jones;
Prof F Laves, 1962 and 1967;
Dr Nobuo Morimoto, 1962;
E (Ted) Radoslovich;
Paul H Ribbe;
Joseph V Smith, 1961;
David B Stewart, 1965, re calcic plagioclases;
Dr William Mackenzie and others, 1960-73, re high albites used 'for structural study';
Josef Zemann.