What type of bonding is present in lithium tetrahydridoaluminate?

I can tell that the negative ion has one bond which is a co-ordinate/dative covalent bond. 


However, overall, would you say that lithium tetrahydridoaluminate (lithium aluminium hydride) is ionic? If so, would you expect a lattice forming? 


[![enter image description here](https://i.stack.imgur.com/aDu2T.gif)](https://i.stack.imgur.com/aDu2T.gif)


