data_global _amcsd_formula_title 'Fe2 O9 Sr4 Tl0.965' loop_ _publ_author_name 'Daniel P' 'Barbey L' 'Groult D' 'Nguyen N' 'Van Tendeloo G' 'Raveau B' _journal_name_full 'European Journal of Solid State and Inorganic Chemistry' _journal_volume 31 _journal_year 1994 _journal_page_first 235 _journal_page_last 244 _publ_section_title ; Mixed valent iron oxides with the 0201-1201 intergrowth structure: (Pb1-x Tlx) Sr4 Fe2 O9 (0