Crystal Structure of ?

Id4322444
Chemical name ?
a (Å)15.262(3)
b (Å)15.262(3)
c (Å)15.255(5)
α (°)90.00
β (°)90.00
γ (°)90.00
V (Å3)3553.3(15)
Space groupI -4
Temperature (K)291