 Zigrasite's atomic coordination consists of two phosphorus sites which are solely occupied by phosphorus and tetrahedrally coordinated by four oxygen anions with distances of 1.532 and 1.533 Å.There are also two magnesium, both of which are occupied solely by Mg and are octahedrally coordinated by two oxygen anions and four (H2O) groups with  distances of 2.064 and 2.075 Å.There is a single zircon site solely occupied by zircon and octahedrally coorinated by six oxygen anions with a  distance of 2.065 Å.