tephroite-fayalite series Directory References Discover 7 Deadliest Weapons in History 9 of the World’s Deadliest Snakes 9 Memorials and Monuments in the United States Why Do Some Cicadas Appear Only Every 17 Years? 7 Everyday English Idioms and Where They Come From 7 of the World’s Deadliest Plants How Deadly Is Quicksand? Contents tephroite-fayalite series mineralogy Ask Our Chatbot a Question Ask Our Chatbot a Question Learn about this topic in these articles:formation In tephroite…Mn2SiO4) forms a solid solution series with the olivine fayalite in which iron completely replaces manganese in the molecular structure. For detailed physical properties, see olivine (table). Read More