Crystal Structure of ?

Id3000099
Chemical name ?
a (Å)12.5517(19)
b (Å)12.5517(19)
c (Å)12.985(3)
α (°)90
β (°)90
γ (°)120
V (Å3)1771.6(6)
Space groupR 3 c :H
Temperature (K)693