The main borate anions are:
* tetrahydroxyborate , found in sodium tetrahydroxyborate .
* orthoborate , found in trisodium orthoborate 
* , found in  the calcium yttrium borosilicate oxyapatite 
* perborate , as in sodium perborate 
* metaborate  or its cyclic trimer , found in sodium metaborate 
* diborate , found in magnesium diborate  (suanite),
* triborate , found in calcium aluminium triborate  (johachidolite),
* tetraborate , found in anhydrous borax 
* tetrahydroxytetraborate , found in borax "decahydrate" 
* tetraborate(6-)  found in lithium tetraborate(6-) 
* pentaborate  or , found in sodium pentaborate 
* octaborate  found in disodium octaborate