The lattice constants are a = 3.25 Å and c = 5.2 Å; their ratio c/a ~ 1.60 is close to the ideal value for hexagonal cell c/a = 1.633.
Konstanta kisinya adalah a = 3.25 Å and c = 5.2 Å; rasio c/a ~ 1.60 mendekati nilai ideal untuk sel heksagonal c/a = 1.633.