A Geoscience Digital Image Library

DescriptionThe white mineral is quartz, and the bluish gray mineral is triphylite, a lithium iron (manganese) phosphate with end member composition LiFePO4. Triphylite forms a solid solution series with lithiophilite, LiMnPO4, and most samples have intermediate compositions. Triphylite is a primary phosphate mineral generally found in granite pegmatites. It alters easily into other phosphate minerals, especially manganese phosphates. Triphylite's name comes from the Greek tri meaning “threefold” and fylon meaning “family” in allusion to the three cations in the formula. This sample is 9.5 cm across.
PhotographerShannon Heinle. 2001-03-06.
CollectionUniversity of North Dakota Mineralogy Collection #1011.
Key wordstriphylite, lithium, phosphate, lithiophilite
Tech details472 KB. Hand specimen. Fujifilm FinePix S1Pro digital camera; 60mm AF Nikon micro lens.
GeoDIL number174