Crystal Structure of ?

Id4330456
Chemical name ?
a (Å)4.09800(3)
b (Å)4.09800(3)
c (Å)19.4316(2)
α (°)90.00000
β (°)90.00000
γ (°)90.00000
V (Å3)326.327(5)
Space groupI 4/m m m
Temperature (K)298(2)