Why Is AlF3 Not Aluminum Trifluoride?

Why Is AlF3 Not Aluminum Trifluoride? Because its a simple inorganic substance, ‘tri’ is superfluous because we know the valency of aluminium is (almost always) 3+ and thus we know there will be three chloride anions without even having to look at its formula. Is AlF3 aluminum a trifluoride? Names Other names Aluminium(III) fluoride Aluminum