vajdakite

== English == === Etymology === From Vajdak +‎ -ite, after Josef Vajdak (1930–2019), for his significant contribution in the study of minerals in the Jachymov ore district (in northwestern Bohemia, Czechia). === Noun === vajdakite (mineralogy) A monoclinic-prismatic mineral containing arsenic, hydrogen, molybdenum, and oxygen. ==== References ==== “vajdakite”, in Mindat.org, Keswick, Va.: Hudson Institute of Mineralogy, 2000–2026. David Barthelmy (1997–2026), “Vajdakite”, in Webmineral Mineralogy Database.