hat
Mg5 (SiO4) 2F2 se fòmil manm nan fen jan yo bay nan Asosyasyon Mineralogik Entènasyonal la, molar mas 351.6 g. Gen anjeneral kèk OH nan sit F yo, sepandan, ak Fe ak Ti ka ranplase pou Mg, se konsa fòmil la pou mineral la natirèlman rive pi bon ekri (Mg, Fe, Ti) 5 (SiO4) 2 (F, OH, O ) 2.
eng
Mg5(SiO4)2F2 is the end member formula as given by the International Mineralogical Association, molar mass 351.6 g. There is usually some OH in the F sites, however, and Fe and Ti can substitute for Mg, so the formula for the naturally occurring mineral is better written (Mg,Fe,Ti)5(SiO4)2(F,OH,O)2.