H in  Triphylite

• Libowitzky E, Beran A, Wieczorek AK, Wirth R (2012) On the presence of a hydrous component in a gemstone variety of intermediate olivine-type triphylite-lithiophilite, Li(Fe,Mn)PO₄.  Mineralogy and Petrology 105, ‏ 31-39 .