data_1010752 _chemical_name_systematic 'Bismuth selenide sulfide (2/1.5/1.5)' _chemical_name_mineral 'Guanajuatite' _chemical_compound_source 'from Guanajuato, Mexico' _chemical_formula_structural 'Bi2 (Se S)1.5' _chemical_formula_sum 'Bi2 S1.5 Se1.5' _publ_section_title ; Roentgenographic observations on ore minerals ; loop_ _publ_author_name 'Peacock, M A' 'Berry, L G' _journal_name_full ; University of Toronto Studies, Geological Series ; _journal_coden_ASTM UTSGAL _journal_volume 44 _journal_year 1940 _journal_page_first 47 _journal_page_last 69