ferricinium ion Directory References Discover Do Lemmings Really Commit Mass Suicide? Why Are Some Time Zones 30 Minutes Off Instead of an Hour? Nostradamus and His Prophecies Uninvited Guests: The 7 Worst Parasitic Worms 8 Deadliest Wars of the 21st Century 6 Cultures That Recognize More than Two Genders Major Mass Extinctions Contents Ask the Chatbot a Question ferricinium ion chemical ion Ask the Chatbot a Question Learn about this topic in these articles:production In ferrocene…of salts containing the blue ferricinium cation, (C5H5)2Fe+. Read More Britannica ChatbotChatbot answers are created from Britannica articles using AI. This is a beta feature. AI answers may contain errors. Please verify important information using Britannica articles. About Britannica AI.