Crystal Structure of ?

Id1517482
Chemical name ?
a (Å)25.8870(16)
b (Å)25.887
c (Å)6.8210(6)
α (°)90.0
β (°)90.0
γ (°)120.0
V (Å3)3958.6(4)
Space groupR -3 :H
Temperature (K)298