#Chromium Oxide, Cr03 #Orthorhombic, Ama2 (40), Z = 4. The structure of Cr03 was studied by Brakken [1931] and #refined by Bystrom and Wilhelmi [1950]. #Lattice constants of this sample #a = 5.7494(15), b = 8.556(2), c = 4.7961(11) #a/b = 0.6720, c/b = 0.5606 #Volume 235.93 A 3 4.279 4.186 3.435 3.383 2.874 2.454 2.398 2.370 2.255 2.139 2.091 2.006 1.966 1.866 1.842 1.749 1.743 1.7168 1.6921 1.6112 1.5954 1.5706 1.5512 1.5380 1.5159